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49 results on '"Mastinu P.F."'

1. Status and perspectives of the neutron time-of-flight facility n_TOF at CERN

Author

Chiaveri E., Aberle O., Alcayne V., Amaducci S., Andrzejewski J., Audouin L., Babiano-Suarez V., Bacak M., Barbagallo M., Bennett S., Berthoumieux E., Bosnar D., Brown A.S., Busso M., Caamaño M., Caballero L., Calviani M., Calviño F., Cano-Ott D., Casanovas A., Cerutti F., Colonna N., Cortés G.P., Cortés-Giraldo M.A., Cosentino L., Cristallo S., Damone L.A., Davies P.J., Diakaki M., Dietz M., Domingo-Pardo C., Dressler R., Ducasse Q., Dupont E., Durán I., Eleme Z., Fernández-Domíngez B., Ferrari A., Ferro-Gonçalves I., Finocchiaro P., Furman V., Garg R., Gawlik A., Gilardoni S., Göbel K., González-Romero E., Guerrero C., Gunsing F., Heinitz S., Heyse J., Jenkins D.G., Jericha E., Jiri U., Junghans A., Kadi Y., Käppeler F., Kimura A., Knapová I., Kokkoris M., Kopatch Y., Krtička M., Kurtulgil D., Ladarescu I., Lederer-Woods C., Lerendegui-Marco J., Lonsdale S.-J., Macina D., Manna A., Martínez T., Masi A., Massimi C., Mastinu P.F., Mastromarco M., Maugeri E., Mazzone A., Mendoza E., Mengoni A., Michalopoulou V., Milazzo P.M., Millán-Callado M.A., Mingrone F., Moreno-Soto J., Musumarra A., Negret A., Ogállar F., Oprea A., Patronis N., Pavlik A., Perkowski J., Petrone C., Piersanti L., Pirovano E., Porras I., Praena J., Quesada J.M., Ramos Doval D., Reifarth R., Rochman D., Rubbia C., Sabaté-Gilarte M., Saxena A., Schillebeeckx P., Schumann D., Sekhar A., Smith A.G., Sosnin N., Sprung P., Stamatopoulos A., Tagliente G., Tain J.L., Tarifeño-Saldivia A.E., Tassan-Got L., Thomas B., Torres-Sánchez P., Tsinganis A., Urlass S., Valenta S., Vannini G., Variale V., Vaz P., Ventura A., Vescovi D., Vlachoudis V., Vlastou R., Wallner A., Woods P.J., Wright T.J., and Žugec P.

Subjects
Physics, QC1-999
Abstract

Since the start of its operation in 2001, based on an idea of Prof. Carlo Rubbia [1], the neutron time of-flight facility of CERN, n_TOF, has become one of the most forefront neutron facilities in the world for wide-energy spectrum neutron cross section measurements. Thanks to the combination of excellent neutron energy resolution and high instantaneous neutron flux available in the two experimental areas, the second of which has been constructed in 2014, n_TOF is providing a wealth of new data on neutron-induced reactions of interest for nuclear astrophysics, advanced nuclear technologies and medical applications. The unique features of the facility will continue to be exploited in the future, to perform challenging new measurements addressing the still open issues and long-standing quests in the field of neutron physics. In this document the main characteristics of the n_TOF facility and their relevance for neutron studies in the different areas of research will be outlined, addressing the possible future contribution of n_TOF in the fields of nuclear astrophysics, nuclear technologies and medical applications. In addition, the future perspectives of the facility will be described including the upgrade of the spallation target, the setup of an imaging installation and the construction of a new irradiation area.

Published
2020
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2. New reaction rates for the destruction of 7Be during big bang nucleosynthesis measured at CERN/n_TOF and their implications on the cosmological lithium problem

Author

Mengoni A., Damone L.A., Barbagallo M., Aberle O., Alcayne V., Amaducci S., Andrzejewski J., Audouin L., Babiano-Suarez V, Bacak M., Bennett S., Berthoumieux E., Bosnar D., Brown A.S., Busso M., Caamaño M., Caballero L., Calviani M., Calviño F., Cano-Ott D, Casanovas A., Cerutti F., Chiaveri E., Colonna N., Cortés G.P., Cortés-Giraldo M.A., Cosentino L., Cristallo S., Davies P.J., Diakaki M., Dietz M., Domingo-Pardo C, Dressler R., Ducasse Q., Dupont E., Durán I., Eleme Z., Fernández-Domíngez B., Ferrari A., Ferro-Gonçalves I., Finocchiaro P., Furman V., Garg R., Gawlik A., Gilardoni S., Göbel K., González-Romero E., Guerrero C., Gunsing F., Heinitz S., Heyse J., Jenkins D.G., Jericha E., Jiri U., Junghans A., Kadi Y., Käppeler F., Kimura A., Knapová I., Kokkoris M., Kopatch Y., Krtička M., Kurtulgil D., Ladarescu I., Lederer-Woods C, Lerendegui-Marco J, Lonsdale S.-J., Macina D., Manna A., Martínez T., Masi A., Massimi C., Mastinu P.F., Mastromarco M., Maugeri E., Mazzone A., Mendoza E., Michalopoulou V., Milazzo P.M., Millán-Callado M.A., Mingrone F., Moreno-Soto J, Musumarra A., Negret A., Ogállar F., Oprea A., Patronis N., Pavlik A., Perkowski J., Petrone C., Piersanti L., Pirovano E., Porras I., Praena J., Quesada J.M., Doval D. Ramos, Reifarth R., Rochman D., Rubbia C., Sabaté-Gilarte M., Saxena A., Schillebeeckx P., Schumann D., Sekhar A., Smith A.G., Sosnin N., Sprung P., Stamatopoulos A., Tagliente G., Tain J.L., Tarifeño-Saldivia A.E., Tassan-Got L, Thomas B., Torres-Sánchez P., Tsinganis A., Urlass S., Valenta S., Vannini G., Variale V., Vaz P., Ventura A., Vescovi D., Vlachoudis V., Vlastou R., Wallner A., Woods P.J., Wright T.J., and Žugec P.

Subjects
Physics, QC1-999
Abstract

New measurements of the 7Be(n,α)4He and 7Be(n,p)7Li reaction cross sections from thermal to keV neutron energies have been recently performed at CERN/n_TOF. Based on the new experimental results, astrophysical reaction rates have been derived for both reactions, including a proper evaluation of their uncertainties in the thermal energy range of interest for big bang nucleosynthesis studies. The new estimate of the 7Be destruction rate, based on these new results, yields a decrease of the predicted cosmological 7Li abundance insufficient to provide a viable solution to the cosmological lithium problem.

Published
2020
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3. High accuracy 234U(n,f) cross section in the resonance energy region

Author

Leal-Cidoncha E., Durán I., Paradela C., Tassan-Got L., Audouin L., Leal L.C., Naour C. Le, Noguere G., Tarrío D., Leong L.S., Altstadt S., Andrzejewski J., Barbagallo M., Bécares V., Bečvář F., Belloni F., Berthoumieux E., Billowes J., Boccone V., Bosnar D., Brugger M., Calviani M., Calviño F., Cano-Ott D., Carrapiço C., Cerutti F., Chiaveri E., Chin M., Colonna N., Cortés G., Cortés-Giraldo M.A., Diakaki M., Domingo-Pardo C., Dressler R., Eleftheriadis C., Ferrari A., Fraval K., Ganesan S., García A.R., Giubrone G., Gómez-Hornillos M.B., Gonçalves I.F., González-Romero E., Griesmayer E., Guerrero C., Gunsing F., Gurusamy P., Hernández-Prieto A., Jenkins D.G., Jericha E., Kadi Y., Käppeler F., Karadimos D., Kivel N., Kokkoris M., Krtička M., Kroll J., Lampoudis C., Langer C., Lederer C., Leeb H., Losito R., Mallick A., Manousos A., Marganiec J., Martínez T., Massimi C., Mastinu P.F., Mastromarco M., Meaze M., Mendoza E., Mengoni A., Milazzo P.M., Mingrone F., Mirea M., Mondelaers W., Pavlik A., Perkowski J., Plompen A., Praena J., Quesada J.M., Rauscher T., Reifarth R., Riego A., Robles M.S., Roman F., Rubbia C., Sabaté-Gilarte M., Sarmento R., Saxena A., Schillebeeckx P., Schmidt S., Schumann D., Tagliente G., Tain J.L., Tsinganis A., Valenta S., Vannini G., Variale V., Vaz P., Ventura A., Versaci R., Vermeulen M.J., Vlachoudis V., Vlastou R., Wallner A., Ware T., Weigand M., Weiß C., Wright T., and Žugec P.

Subjects
Physics, QC1-999
Abstract

New results are presented of the 234U neutron-induced fission cross section, obtained with high accuracy in the resonance region by means of two methods using the 235U(n,f) as reference. The recent evaluation of the 235U(n,f) obtained with SAMMY by L. C. Leal et al. (these Proceedings), based on previous n_TOF data [1], has been used to calculate the 234U(n,f) cross section through the 234U/235U ratio, being here compared with the results obtained by using the n_TOF neutron flux.

Published
2017
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4. Fission Fragment Angular Distribution measurements of 235U and 238U at CERN n_TOF facility

Author

Leal-Cidoncha E., Durán I., Paradela C., Tarrío D., Leong L.S., Tassan-Got L., Audouin L., Altstadt S., Andrzejewski J., Barbagallo M., Bécares V., Bečvář F., Belloni F., Berthoumieux E., Billowes J., Boccone V., Bosnar D., Brugger M., Calviani M., Calviño F., Cano-Ott D., Carrapiço C., Cerutti F., Chiaveri E., Chin M., Colonna N., Cortés G., Cortés-Giraldo M.A., Diakaki M., Domingo-Pardo C., Dressler R., Dzysiuk N., Eleftheriadis C., Ferrari A., Fraval K., Ganesan S., García A.R., Giubrone G., Gómez-Hornillos M.B., Gonçalves I.F., González-Romero E., Griesmayer E., Guerrero C., Gunsing F., Gurusamy P., Hernández-Prieto A., Jenkins D.G., Jericha E., Kadi Y., Käppeler F., Karadimos D., Kivel N., Koehler P., Kokkoris M., Krtička M., Kroll J., Lampoudis C., Langer C., Lederer C., Leeb H., Lo Meo S., Losito R., Mallick A., Manousos A., Marganiec J., Martínez T., Massimi C., Mastinu P.F., Mastromarco M., Meaze M., Mendoza E., Mengoni A., Milazzo P.M., Mingrone F., Mirea M., Mondelaers W., Pavlik A., Perkowski J., Plompen A., Praena J., Quesada J.M., Rauscher T., Reifarth R., Riego A., Robles M.S., Roman F., Rubbia C., Sabaté-Gilarte M., Sarmento R., Saxena A., Schillebeeckx P., Schmidt S., Schumann D., Tagliente G., Tain J.L., Tsinganis A., Valenta S., Vannini G., Variale V., Vaz P., Ventura A., Versaci R., Vermeulen M.J., Vlachoudis V., Vlastou R., Wallner A., Ware T., Weigand M., Weiß C., Wright T., and Žugec P.

Subjects
Physics, QC1-999
Abstract

Neutron-induced fission cross sections of 238U and 235U are used as standards in the fast neutron region up to 200 MeV. A high accuracy of the standards is relevant to experimentally determine other neutron reaction cross sections. Therefore, the detection effciency should be corrected by using the angular distribution of the fission fragments (FFAD), which are barely known above 20 MeV. In addition, the angular distribution of the fragments produced in the fission of highly excited and deformed nuclei is an important observable to investigate the nuclear fission process. In order to measure the FFAD of neutron-induced reactions, a fission detection setup based on parallel-plate avalanche counters (PPACs) has been developed and successfully used at the CERN-n_TOF facility. In this work, we present the preliminary results on the analysis of new 235U(n,f) and 238U(n,f) data in the extended energy range up to 200 MeV compared to the existing experimental data.

Published
2016
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5. The SPES project of INFN: Facility and detectors

Author

de Angelis G., Prete G., Andrighetto A., Manzolaro M., Corradetti S., Scarpa D., Rossignoli M., Monetti A., Lollo M., Calderolla M., Vasquez J., Zafiropoulos D., Sarchiapone L., Benini D., Favaron P., Rigato M., Pegoraro R., Maniero D., Calabretta L., Comunian M., Maggiore M., Lombardi A., Piazza L., Porcellato A.M., Roncolato C., Bisoffi G., Pisent A., Galatà A., Giacchini M., Bassato G., Canella S., Gramegna F., Valiente J., Bermudez J., Mastinu P.F., Esposito J., Wyss J., Russo A., and Zanella S.

Subjects
Physics, QC1-999
Abstract

The SPES Radioactive Ion Beam facility at INFN-LNL is presently in the construction phase. The facility is based on the Isol (Isotope separation on-line) method with an UCx Direct Target able to sustain a power of 10 kW. The primary proton beam is provided by a high current Cyclotron accelerator with energy of 35-70 MeV and a beam current of 0.2-0.5 mA. Neutron-rich radioactive ions are produced by proton induced Uranium fission at an expected fission rate of the order of 1013 fissions per second. After ionization and selection the exotic isotopes are re-accelerated by the ALPI superconducting Linac at energies of 10A MeV for masses in the region A = 130 amu. The expected secondary beam rates are of the order of 107 - 109 pps. Aim of the SPES project is to provide a facility for high intensity radioactive ion beams for nuclear physics research as well as to develop an interdisciplinary research center based on the cyclotron proton beam.

Published
2015
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6. Experimental neutron capture data of 58Ni from the CERN n_TOF facility

Author

Žugec P., Barbagallo M., Colonna N., Bosnar D., Altstadt S., Andrzejewski J., Audouin L., Bécares V., Bečvář F., Belloni F., Berthoumieux E., Billowes J., Boccone V., Brugger M., Calviani M., Calviño F., Cano-Ott D., Carrapiço C., Cerutti F., Chiaveri E., Chin M., Cortés G., Cortés-Giraldo M.A., Diakaki M., Domingo-Pardo C., Dressler R., Duran I., Dzysiuk N., Eleftheriadis C., Ferrari A., Fraval K., Ganesan S., García A.R., Giubrone G., Gómez-Hornillos M.B., Gonçalves I.F., González-Romero E., Griesmayer E., Guerrero C., Gunsing F., Gurusamy P., Heinitz S., Jenkins D.G., Jericha E., Kadi Y., Käppeler F., Karadimos D., Kivel N., Koehler P., Kokkoris M., Krtička M., Kroll J., Langer C., Lederer C., Leeb H., Leong L.S., Lo Meo S., Losito R., Manousos A., Marganiec J., Martínez T., Massimi C., Mastinu P.F., Mastromarco M., Meaze M., Mendoza E., Mengoni A., Milazzo P.M., Mingrone F., Mirea M., Mondalaers W., Paradela C., Pavlik A., Perkowski J., Pignatari M., Plompen A., Praena J., Quesada J.M., Rauscher T., Reifarth R., Riegov A., Roman F., Rubbia C., Sarmento R., Saxena A., Schillebeeckx P., Schmidt S., Schumann D., Tagliente G., Tain J.L., Tarrío D., Tassan-Got L., Tsinganis A., Valenta S., Vannini G., Variale V., Vaz P., Ventura A., Versaci R., Vermeulen M.J., Vlachoudis V., Vlastou R., Wallner A., Ware T., Weigand M., Weiß C., and Wright T.

Subjects
Physics, QC1-999
Abstract

The neutron capture cross section of 58Ni was measured at the neutron time of flight facility n_TOF at CERN, from 27 meV to 400 keV neutron energy. Special care has been taken to identify all the possible sources of background, with the so-called neutron background obtained for the first time using high-precision GEANT4 simulations. The energy range up to 122 keV was treated as the resolved resonance region, where 51 resonances were identified and analyzed by a multilevel R-matrix code SAMMY. Above 122 keV the code SESH was used in analyzing the unresolved resonance region of the capture yield. Maxwellian averaged cross sections were calculated in the temperature range of kT = 5 – 100 keV, and their astrophysical implications were investigated.

Published
2015
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7. The SPES project at the INFN- Laboratori Nazionali di Legnaro

Author

Pretea G., Andrighetto A., Manzolaro M., Corradetti S., Scarpa D., Rossignoli M., Monetti A., Lollo M., Calderolla M., Vasquez J., Zafiropoulos D., Sarchiapone L., Benini D., Favaron P., Rigato M., Pegoraro R., Maniero D., Calabretta L., Comunian M., Maggiore M., Lombardi A., Piazza L., Porcellato A.M., Roncolato C., Bisoffi G., Pisent A., Galatà A., Giacchini M., Bassato G., Canella S., Gramegna F., Valiente J., Bermudez J., Mastinu P.F., Esposito J., Wyss J., and Zanella S.

Subjects
Physics, QC1-999
Abstract

The SPES Radioactive Ion Beam (RIB) facility at INFN-LNL is in the construction phase. It is based on the ISOL method with an UCx Direct Target able to sustain a power of 10 kW. The primary proton beam is delivered by a high current Cyclotron accelerator, with energy 35-70 MeV and a beam current of 0.2-0.5 mA. Neutron-rich radioactive ions will be produced by proton induced Uranium fission in the UCx target at an expected fission rate in the order of 1013 fissions per second. The exotic isotopes will be re-accelerated by the ALPI superconducting LINAC at energies of 10A MeV and higher, for masses in the region A=130 amu at expected rate on the secondary target of 107 – 109 pps. The SPES project has the aim to provide high intensity and highquality beams of neutron-rich nuclei as well as to develop an interdisciplinary research center based on the cyclotron proton beam.

Published
2014
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8. The nucleosynthesis of heavy elements in Stars: the key isotope 25Mg

Author

Massimi C., Koehler P., Kopecky S., Mingrone F., Schillebeeckx P., Vannini G., Altstadt S., Andrzejewski J., Audouin L., Barbagallo M., Bécares V., Bečvář F., Belloni F, Berthoumieux E., Billowes J., Bosnar D., Brugger M., Calviani M., Calviño F., Cano-Ott D., Carrapiço C., Cerutti F., Chiaveri E., Chin M., Colonna N., Cortés G., Cortés-Giraldo M.A., Diakaki M., Domingo-Pardo C., Duran I., Dressler R., Eleftheriadis C., Ferrari A., Fraval K., Ganesan S., García A.R., Giubrone G., Gonçalves I.F., González-Romero E., Griesmayer E., Guerrero C., Gunsing F., Hernández-Prieto A., Jenkins D.G., Jericha E., Kadi Y., Käppeler F., Karadimos D., Kivel N., Krtička M., Kroll J., Lampoudis C., Langer C., Leal-Cidoncha E., Lederer C., Leeb H., Leong L.S., Losito R., Mallick A., Manousos A., Marganiec J., Martínez T., Mastinu P.F., Mastromarco M., Mendoza E., Mengoni A., Milazzo P.M., Mirea M., Mondalaers W., Paradela C., Pavlik A., Perkowski J., Plompen A., Praena J., Quesada J.M., Rauscher T., Reifarth R., Riego A., Robles M.S., Rubbia C., Sabaté-Gilarte M., Sarmento R., Saxena A., Schmidt S., Schumann D., Tagliente G., Tain J.L., Tarrío D., Tassan-Got L., Tsinganis A., Valenta S., Variale V., Vaz P., Ventura A., Vermeulen M.J., Vlachoudis V., Vlastou R., Wallner A., Ware T., Weigand M., Weiß C., Wright T., and Žugec P.

Subjects
Physics, QC1-999
Abstract

We have measured the radiative neutron-capture cross section and the total neutron-induced cross section of one of the most important isotopes for the s process, the 25Mg. The measurements have been carried out at the neutron time-of-flight facilities n_TOF at CERN (Switzerland) and GELINA installed at the EC-JRC-IRMM (Belgium). The cross sections as a function of neutron energy have been measured up to approximately 300 keV, covering the energy region of interest to the s process. The data analysis is ongoing and preliminary results show the potential relevance for the s process.

Published
2014
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9. 238U(n, γ) reaction cross section measurement with C6D6 detectors at the n_TOF CERN facility.

Author

Mingrone F., Massimi C., Vannini G., Altstadt S., Andrzejewski J., Audouin L., Barbagallo M., Bécares V., Bečvář F., Belloni F, Berthoumieux E., Billowes J., Bosnar D., Brugger M., Calviani M., Calviño F., Cano-Ott D., Carrapiço C., Cerutti F., Chiaveri E., Chin M., Colonna N., Cortés G., Cortés-Giraldo M.A., Diakaki M., Domingo-Pardo C., Duran I., Dressler R., Eleftheriadis C., Ferrari A., Fraval K., Ganesan S., García A.R., Giubrone G., Gonçalves I.F., González-Romero E., Griesmayer E., Guerrero C., Gunsing F., Hernández-Prieto A., Jenkins D.G., Jericha E., Kadi Y., Käppeler F., Karadimos D., Kivel N., Koehler P., Krtička M., Kroll J., Lampoudis C., Langer C., Leal-Cidoncha E., Lederer C., Leeb H., Leong L.S., Losito R., Mallick A., Manousos A., Marganiec J., Martínez T., Mastinu P.F., Mastromarco M., Mendoza E., Mengoni A., Milazzo P.M., Mirea M., Mondalaers W., Paradela C., Pavlik A., Perkowski J., Plompen A., Praena J., Quesada J.M., Rauscher T., Reifarth R., Riego A., Robles M.S., Rubbia C., Sabaté-Gilarte M., Sarmento R., Saxena A., Schillebeeckx P., Schmidt S., Schumann D., Tagliente G., Tain J.L., Tarrío D., Tassan-Got L., Tsinganis A., Valenta S., Variale V., Vaz P., Ventura A., Vermeulen M.J., Vlachoudis V., Vlastou R., Wallner A., Ware T., Weigand M., Weiß C., Wright T., and Žugec P.

Subjects
Physics, QC1-999
Abstract

The radiative capture cross section of 238U is very important for the developing of new reactor technologies and the safety of existing ones. Here the preliminary results of the 238U(n,γ) cross section measurement performed at n_TOF with C6D6 scintillation detectors are presented, paying particular attention to data reduction and background subtraction.

Published
2014
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10. Current quests in nucleosynthesis: present and future neutron-induced reaction measurements

Author

Praena J., Pignatari M., Mastinu P.F., Martín-Hernández G., Prete G., Quesada J.M., and Sabaté-Gilarte M.

Subjects
Physics, QC1-999
Abstract

We present some open questions in nucleosynthesis focused on the measurement of relevant neutron capture cross-sections and on new experimental methods. We review the recent 63Ni(n,γ) experiment carried out at the n_TOF facility at CERN and its astrophysical implications as well as future experiments and opportunities at n_TOF. We argue some improvements in the measurement of cross-sections by activation arising from a new method for the generation of stellar neutron spectra. We show preliminary results of the experimental validation of the method. We discuss the astrophysical implications of the 181Ta(n,γ) stellar cross-section measured with this method. Finally, we describe challenging experiments consisting of in situ radioactive ion beams and stellar neutron beams.

Published
2014
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11. Measurements of neutron cross sections for advanced nuclear energy systems at n_TOF (CERN)

Author

Barbagallo M., Colonna N., Altstadt S., Andrzejewski J., Audouin L., Bécares V., Bečvář F., Belloni F, Berthoumieux E., Billowes J., Bosnar D., Brugger M., Calviani M., Calviño F., Cano-Ott D., Carrapiço C., Cerutti F., Chiaveri E., Chin M., Cortés G., Cortés-Giraldo M.A., Diakaki M., Domingo-Pardo C., Duran I., Dressler R., Eleftheriadis C., Ferrari A., Fraval K., Ganesan S., García A.R., Giubrone G., Gonçalves I.F., González-Romero E., Griesmayer E., Guerrero C., Gunsing F., Hernández-Prieto A., Jenkins D.G., Jericha E., Kadi Y., Käppeler F., Karadimos D., Kivel N., Koehler P., Krtička M., Kroll J., Lampoudis C., Langer C., Leal-Cidoncha E., Lederer C., Leeb H., Leong L.S., Losito R., Manousos A., Marganiec J., Martínez T., Massimi C., Mastinu P.F., Mastromarco M., Mendoza E., Mengoni A., Milazzo P.M., Mingrone F., Mirea M., Mondalaers W., Paradela C., Pavlik A., Perkowski J., Plompen A., Praena J., Quesada J.M., Rauscher T., Reifarth R., Riego A., Rubbia C., Sabaté-Gilarte M., Sarmento R., Saxena A., Schillebeeckx P., Schmidt S., Schumann D., Tagliente G., Tain J.L., Tarrío D., Tassan-Got L., Tsinganis A., Valenta S., Vannini G., Variale V., Vaz P., Ventura A., Vermeulen M.J., Vlachoudis V., Vlastou R., Wallner A., Ware T., Weigand M., Weiß C., Wright T., and Žugec P.

Subjects
Physics, QC1-999
Abstract

The n_TOF facility operates at CERN with the aim of addressing the request of high accuracy nuclear data for advanced nuclear energy systems as well as for nuclear astrophysics. Thanks to the features of the neutron beam, important results have been obtained on neutron induced fission and capture cross sections of U, Pu and minor actinides. Recently the construction of another beam line has started; the new line will be complementary to the first one, allowing to further extend the experimental program foreseen for next measurement campaigns.

Published
2014
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12. Neutron cross-sections for advanced nuclear systems: the n_TOF project at CERN

Author

Barbagallo M., Mastromarco M., Colonna N., Altstadt S., Andrzejewski J., Audouin L., Bécares V., Bečvář F., Belloni F, Berthoumieux E., Billowes J., Bosnar D., Brugger M., Calviani M., Calviño F., Cano-Ott D., Carrapiço C., Cerutti F., Chiaveri E., Chin M., Cortés G., Cortés-Giraldo M.A., Diakaki M., Domingo-Pardo C., Duran I., Dressler R., Eleftheriadis C., Ferrari A., Fraval K., Ganesan S., García A.R., Giubrone G., Gonçalves I.F., González-Romero E., Griesmayer E., Guerrero C., Gunsing F., Hernández-Prieto A., Jenkins D.G., Jericha E., Kadi Y., Käppeler F., Karadimos D., Kivel N., Koehler P., Krtička M., Kroll J., Lampoudis C., Langer C., Leal-Cidoncha E., Lederer C., Leeb H., Leong L.S., Losito R., Manousos A., Marganiec J., Martínez T., Massimi C., Mastinu P.F., Mendoza E., Mengoni A., Milazzo P.M., Mingrone F., Mirea M., Mondalaers W., Paradela C., Pavlik A., Perkowski J., Plompen A., Praena J., Quesada J.M., Rauscher T., Reifarth R., Riego A., Rubbia C., Sabaté-Gilarte M., Sarmento R., Saxena A., Schillebeeckx P., Schmidt S., Schumann D., Tagliente G., Tain J.L., Tarrío D., Tassan-Got L., Tsinganis A., Valenta S., Vannini G., Variale V., Vaz P., Ventura A., Vermeulen M.J., Vlachoudis V., Vlastou R., Wallner A., Ware T., Weigand M., Weiß C., Wright T., and Žugec P.

Subjects
Physics, QC1-999
Abstract

The study of neutron-induced reactions is of high relevance in a wide variety of fields, ranging from stellar nucleosynthesis and fundamental nuclear physics to applications of nuclear technology. In nuclear energy, high accuracy neutron data are needed for the development of Generation IV fast reactors and accelerator driven systems, these last aimed specifically at nuclear waste incineration, as well as for research on innovative fuel cycles. In this context, a high luminosity Neutron Time Of Flight facility, n_TOF, is operating at CERN since more than a decade, with the aim of providing new, high accuracy and high resolution neutron cross-sections. Thanks to the features of the neutron beam, a rich experimental program relevant to nuclear technology has been carried out so far. The program will be further expanded in the near future, thanks in particular to a new high-flux experimental area, now under construction.

Published
2014
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13. Angular distribution in the neutron-induced fission of actinides

Author

Leong L.S., Tassan-Got L., Tarrio D., Audouin L., Paradela C., Duran I., Le Naour C., Altstadt S., Andrzejewsky J., Barbagallo M., Bécares V., Bečvář F., Belloni F., Berthoumieux E., Billowes J., Boccone V., Bosnar D., Brugger M., Calvino F., Calviani M., Cano-Ott D., Carrapiço C., Cerutti F., Chiaveri E., Chin M., Colonna N., Cortés G., Cortés-Giraldo M.A., Diakaki M., Domingo-Pardo C., Dressler R., Dzysiuk N., Eleftheriadis C., Ferrari A., Fraval K., Ganesan S., García A.R., Giubrone G., Gómez-Hornillos M.B., Gonçalves I.F., González-Romero, Griesmayer E., Guerrero C., Gunsing F., Gurusamy P., Jenkins D.G., Jericha E., Kadi E., Käppeler F., Karadimos D., Kivel N., Koehler P., Kokkoris M., Korschinek G., Kroll J., Krtička M., Langer C., Lederer C., Leeb H., Losito R., Manousos A., Marganiec J., Massimi C., Martínez T., Mastinu P.F., Mastromarco M., Meaze M., Mengon A., Mendoza E., Milazzo P.M., Mingrone T., Mirea M., Mondelaers W., Pavlik A., Perkowski J., Pignatari M., Plompen A., Praena J., Quesada J.M., Rauscher T., Reifhart R., Riego A., Roman F., Rubbia C., Sarmento R., Schillebeeckx P., Schmidt S., Schumann D., Taín J.L., Tagliente G., Tsinganis A., Valenta S., Vannini G., Variale V., Vaz P., Ventura A., Versaci R., Vermeulen M.J., Vlachoudis V., Vlastou V., Wallner A., Ware T., Weigand M., Weiß C., Wright T., and Zǔgec

Subjects
Physics, QC1-999
Abstract

Above 1 MeV of incident neutron energy the fission fragment angular distribution (FFAD) has generally a strong anisotropic behavior due to the combination of the incident orbital momentum and the intrinsic spin of the fissioning nucleus. This effect has to be taken into account for the efficiency estimation of devices used for fission cross section measurements. In addition it bears information on the spin deposition mechanism and on the structure of transitional states. We designed and constructed a detection device, based on Parallel Plate Avalanche Counters (PPAC), for measuring the fission fragment angular distributions of several isotopes, in particular 232Th. The measurement has been performed at n_TOF at CERN taking advantage of the very broad energy spectrum of the neutron beam. Fission events were recognized by back to back detection in coincidence in two position-sensitive detectors surrounding the targets. The detection efficiency, depending mostly on the stopping of fission fragments in backings and electrodes, has been computed with a Geant4 simulation and validated by the comparison to the measured case of 235U below 3 keV where the emission is isotropic. In the case of 232Th, the result is in good agreement with previous data below 10 MeV, with a good reproduction of the structures associated to vibrational states and the opening of second chance fission. In the 14 MeV region our data are much more accurate than previous ones which are broadly scattered.

Published
2013
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14. Present status and future programs of the n_TOF experiment

Author

Wright T.J., Ware T., Vlastou R., Wallner A., Vermeulen M.J., Versaci R., Vaz P., Ventura A., Valenta S., Vannini G., Variale V., Tassan-Got L., Tsinganis A., Tain J.L., Tarrio D., Sarmento R., Tagliente G., Roman F., Rubbia C., Reifarth R., Riego A., Rauscher T., Quesada J.M., Perkowski J., Praena J., Paradela C., Pavlik A., Mirea M., Mengoni A., Milazzo P.M., Mendoza E., Meaze M., Mastromarco M., Mastinu P.F., Martinez T., Massimi C., Manousos A., Marganiec J., Lozano M., Losito R., Leong L.S., Lederer C., Leeb H., Krtička M., Kroll J., Karadimos D., Kokkoris M., Käppeler F., Kadi Y., Jenkins D.G., Jericha E., Guerrero C., Gunsing F., Heil M., Griesmayer E., González-Romero E., Gramegna F., Gonçalves I.F., Gómez-Hornillos M.B., Giubrone G., Ganesan S., Fraval K., Fernández-Ordóñez M., Ferrari A., Dzysiuk N., Eleftheriadis C., Duran I., Dillmann I., Domingo-Pardo C., Diakaki M., Cortés-Giraldo M.A., Cortés G., Colonna N., Chin M., Carrapiço C., Cerutti F., Calviño F., Cano-Ott D., Brugger M., Billowes J., Boccone V., Berthoumieux E., Belloni F., Barbagallo M., Bécares V., Beĉvář F., Avrigeanu F., Andrzejewski J., Audouin L., Weis C., Andriamonje S., Vlachoudis V., Calviani M., and Chiaveri E.

Subjects
Physics, QC1-999
Abstract

The neutron time-of-flight facility n_TOF at CERN, Switzerland, operational since 2001, delivers neutrons using the Proton Synchrotron (PS) 20 GeV/c proton beam impinging on a lead spallation target. The facility combines a very high instantaneous neutron flux, an excellent time of flight resolution due to the distance between the experimental area and the production target (185 meters), a low intrinsic background and a wide range of neutron energies, from thermal to GeV neutrons. These characteristics provide a unique possibility to perform neutron-induced capture and fission cross-section measurements for applications in nuclear astrophysics and in nuclear reactor technology. The most relevant measurements performed up to now and foreseen for the future will be presented in this contribution. The overall efficiency of the experimental program and the range of possible measurements achievable with the construction of a second experimental area (EAR-2), vertically located 20 m on top of the n_TOF spallation target, might offer a substantial improvement in measurement sensitivities. A feasibility study of the possible realisation of the installation extension will be also presented.

Published
2012
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16. Measurement of the 154Gd(n,γ) cross section and its astrophysical implications

Author

Mazzone, A., Cristallo, S., Aberle, O., Alaerts, G., Alcayne, V., Amaducci, S., Andrzejewski, J., Audouin, L., Babiano-Suarez, V., Bacak, M., Barbagallo, M., Bécares, V., Bečvář, F., Bellia, G., Berthoumieux, E., Billowes, J., Bosnar, D., Brown, A.S., Busso, M., Caamaño, M., Caballero, L., Calviani, M., Calviño, F., Cano-Ott, D., Casanovas, A., Castelluccio, D.M., Cerutti, F., Chen, Y.H., Chiaveri, E., Clai, G., Colonna, N., Cortés, G.P., Cortés-Giraldo, M.A., Cosentino, L., Damone, L.A., Diakaki, M., Dietz, M., Domingo-Pardo, C., Dressler, R., Dupont, E., Durán, I., Eleme, Z., Fernández-Domíngez, B., Ferrari, A., Ferro-Gonçalves, I., Finocchiaro, P., Furman, V., Garg, R., Gawlik, A., Gilardoni, S., Glodariu, T., Göbel, K., González-Romero, E., Guerrero, C., Gunsing, F., Heinitz, S., Heyse, J., Jenkins, D.G., Jericha, E., Kadi, Y., Käppeler, F., Kimura, A., Kivel, N., Kokkoris, M., Kopatch, Y., Kopecky, S., Krtička, M., Kurtulgil, D., Ladarescu, I., Lederer-Woods, C., Lerendegui-Marco, J., Lo Meo, S., Lonsdale, S.-J., Macina, D., Manna, A., Martínez, T., Masi, A., Massimi, C., Mastinu, P.F., Mastromarco, M., Matteucci, F., Maugeri, E., Mendoza, E., Mengoni, A., Michalopoulou, V., Milazzo, P.M., Mingrone, F., Mucciola, R., Musumarra, A., Negret, A., Nolte, R., Ogállar, F., Oprea, A., Patronis, N., Pavlik, A., Perkowski, J., Piersanti, L., Porras, I., Praena, J., Quesada, J.M., Radeck, D., Ramos Doval, D., Reifarth, R., Rochman, D., Rubbia, C., Sabaté-Gilarte, M., Saxena, A., Schillebeeckx, P., Schumann, D., Smith, A.G., Sosnin, N., Stamatopoulos, A., Tagliente, G., Tain, J.L., Talip, Z., Tarifeño-Saldivia, A.E., Tassan-Got, L., Torres-Sánchez, P., Tsinganis, A., Ulrich, J., Urlass, S., Valenta, S., Vannini, G., Variale, V., Vaz, P., Ventura, A., Vescovi, D., Vlachoudis, V., Vlastou, R., Wallner, A., Woods, P.J., Wynants, R., Wright, T.J., and Žugec, P.

Published
2020
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17. Measurement of the Gd(n, ) Cross Section and its Astrophysical Implications

Author

Mazzone, A., Cristallo, S., Aberle, O., Alaerts, G., Alcayne, V., Amaducci, S., Andrzejewski, J., Audouin, L., Babiano-Suarez, V., Bacak, M., Barbagallo, M., Bécares, V., Bečvář, F., Bellia, G., Berthoumieux, E., Billowes, J., Bosnar, D., Brown, A.S., Busso, M., Caamaño, M., Caballero, L., Calviani, M., Calviño, F., Cano-Ott, D., Casanovas, A., Castelluccio, D.M., Cerutti, F., Chen, Y.H., Chiaveri, E., Clai, G., Colonna, N., Cortés, G.P., Cortés-Giraldo, M.A., Cosentino, L., Damone, L.A., Diakaki, M., Dietz, M., Domingo-Pardo, C., Dressler, R., Dupont, E., Durán, I., Eleme, Z., Fernández-Domíngez, B., Ferrari, A., Ferro-Gonçalves, I., Finocchiaro, P., Furman, V., Garg, R., Gawlik, A., Gilardoni, S., Glodariu, T., Göbel, K., González-Romero, E., Guerrero, C., Gunsing, F., Heinitz, S., Heyse, J., Jenkins, D.G., Jericha, E., Kadi, Y., Käppeler, F., Kimura, A., Kivel, N., Kokkoris, M., Kopatch, Y., Kopecky, S., Krtička, M., Kurtulgil, D., Ladarescu, I., Lederer-Woods, C., Lerendegui-Marco, J., Lo Meo, S., Lonsdale, S.J., Macina, D., Manna, A., Martínez, T., Masi, A., Massimi, C., Mastinu, P.F., Mastromarco, M., Matteucci, F., Maugeri, E., Mendoza, E., Mengoni, A., Michalopoulou, V., Milazzo, P.M., Mingrone, F., Mucciola, R., Musumarra, A., Negret, A., Nolte, R., Ogállar, F., Oprea, A., Patronis, N., Pavlik, A., Perkowski, J., Piersanti, L., Porras, I., Praena, J., Quesada, J.M., Radeck, D., Ramos Doval, D., Reifarth, R., Rochman, D., Rubbia, C., Sabaté-Gilarte, M., Saxena, A., Schillebeeckx, P., Schumann, D., Smith, A.G., Sosnin, N., Stamatopoulos, A., Tagliente, G., Tain, J.L., Talip, Z., Tarifeño-Saldivia, A.E., Tassan-Got, L., Torres-Sánchez, P., Tsinganis, A., Ulrich, J., Urlass, S., Valenta, S., Vannini, G., Variale, V., Vaz, P., Ventura, A., Vescovi, D., Vlachoudis, V., Vlastou, R., Wallner, A., Woods, P.J., Wynants, R., Wright, T.J., and Žugec, P.

Abstract

The neutron capture cross section of $^{154}$Gd was measured from 1 eV to 300 keV in the experimental area located 185 m from the CERN n_TOF neutron spallation source, using a metallic sample of gadolinium, enriched to 67% in $^{154}$Gd. The capture measurement, performed with four C$_{6}$D$_{6}$ scintillation detectors, has been complemented by a transmission measurement performed at the GELINA time-of-flight facility (JRC-Geel), thus minimising the uncertainty related to sample composition. An accurate Maxwellian averaged capture cross section (MACS) was deduced over the temperature range of interest for s process nucleosynthesis modelling. We report a value of 880(50) mb for the MACS at kT=30 keV, significantly lower compared to values available in literature. The new adopted $^{154}$Gd(n,γ) cross section reduces the discrepancy between observed and calculated solar s-only isotopic abundances predicted by s-process nucleosynthesis models.

Published
2020

18. New reaction rates for the destruction of7Be during big bang nucleosynthesis measured at CERN/n_TOF and their implications on the cosmological lithium problem

Author

Mengoni, A., primary, Damone, L.A., additional, Barbagallo, M., additional, Aberle, O., additional, Alcayne, V., additional, Amaducci, S., additional, Andrzejewski, J., additional, Audouin, L., additional, Babiano-Suarez, V, additional, Bacak, M., additional, Bennett, S., additional, Berthoumieux, E., additional, Bosnar, D., additional, Brown, A.S., additional, Busso, M., additional, Caamaño, M., additional, Caballero, L., additional, Calviani, M., additional, Calviño, F., additional, Cano-Ott, D, additional, Casanovas, A., additional, Cerutti, F., additional, Chiaveri, E., additional, Colonna, N., additional, Cortés, G.P., additional, Cortés-Giraldo, M.A., additional, Cosentino, L., additional, Cristallo, S., additional, Davies, P.J., additional, Diakaki, M., additional, Dietz, M., additional, Domingo-Pardo, C, additional, Dressler, R., additional, Ducasse, Q., additional, Dupont, E., additional, Durán, I., additional, Eleme, Z., additional, Fernández-Domíngez, B., additional, Ferrari, A., additional, Ferro-Gonçalves, I., additional, Finocchiaro, P., additional, Furman, V., additional, Garg, R., additional, Gawlik, A., additional, Gilardoni, S., additional, Göbel, K., additional, González-Romero, E., additional, Guerrero, C., additional, Gunsing, F., additional, Heinitz, S., additional, Heyse, J., additional, Jenkins, D.G., additional, Jericha, E., additional, Jiri, U., additional, Junghans, A., additional, Kadi, Y., additional, Käppeler, F., additional, Kimura, A., additional, Knapová, I., additional, Kokkoris, M., additional, Kopatch, Y., additional, Krtička, M., additional, Kurtulgil, D., additional, Ladarescu, I., additional, Lederer-Woods, C, additional, Lerendegui-Marco, J, additional, Lonsdale, S.-J., additional, Macina, D., additional, Manna, A., additional, Martínez, T., additional, Masi, A., additional, Massimi, C., additional, Mastinu, P.F., additional, Mastromarco, M., additional, Maugeri, E., additional, Mazzone, A., additional, Mendoza, E., additional, Michalopoulou, V., additional, Milazzo, P.M., additional, Millán-Callado, M.A., additional, Mingrone, F., additional, Moreno-Soto, J, additional, Musumarra, A., additional, Negret, A., additional, Ogállar, F., additional, Oprea, A., additional, Patronis, N., additional, Pavlik, A., additional, Perkowski, J., additional, Petrone, C., additional, Piersanti, L., additional, Pirovano, E., additional, Porras, I., additional, Praena, J., additional, Quesada, J.M., additional, Doval, D. Ramos, additional, Reifarth, R., additional, Rochman, D., additional, Rubbia, C., additional, Sabaté-Gilarte, M., additional, Saxena, A., additional, Schillebeeckx, P., additional, Schumann, D., additional, Sekhar, A., additional, Smith, A.G., additional, Sosnin, N., additional, Sprung, P., additional, Stamatopoulos, A., additional, Tagliente, G., additional, Tain, J.L., additional, Tarifeño-Saldivia, A.E., additional, Tassan-Got, L, additional, Thomas, B., additional, Torres-Sánchez, P., additional, Tsinganis, A., additional, Urlass, S., additional, Valenta, S., additional, Vannini, G., additional, Variale, V., additional, Vaz, P., additional, Ventura, A., additional, Vescovi, D., additional, Vlachoudis, V., additional, Vlastou, R., additional, Wallner, A., additional, Woods, P.J., additional, Wright, T.J., additional, and Žugec, P., additional

Published
2020
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19. Neutron spectroscopy of 26Mg states: Constraining the stellar neutron source 22Ne(α,n)25Mg

Author

Massimi, C., Altstadt, S., Andrzejewski, J., Audouin, L., Barbagallo, M., Bécares, V., Bečvář, F., Belloni, F., Berthoumieux, E., Billowes, J., Bisterzo, S., Bosnar, D., Brugger, M., Calviani, M., Calviño, F., Cano-Ott, D., Carrapiço, C., Castelluccio, D.M., Cerutti, F., Chiaveri, E., Cosentino, L., Chin, M., Clai, G., Colonna, N., Cortés, G., Cortés-Giraldo, M.A., Cristallo, S., Diakaki, M., Domingo-Pardo, C., Duran, I., Dressler, R., Eleftheriadis, C., Ferrari, A., Finocchiaro, P., Fraval, K., Ganesan, S., García, A.R., Giubrone, G., Gonçalves, I.F., González-Romero, E., Griesmayer, E., Guerrero, C., Gunsing, F., Hernández-Prieto, A., Jenkins, D.G., Jericha, E., Kadi, Y., Käppeler, F., Karadimos, D., Kivel, N., Koehler, P., Kokkoris, M., Kopecky, S., Krtička, M., Kroll, J., Lampoudis, C., Langer, C., Leal-Cidoncha, E., Lederer, C., Leeb, H., Leong, L.S., Lo Meo, S., Losito, R., Mallick, A., Manousos, A., Marganiec, J., Martínez, T., Mastinu, P.F., Mastromarco, M., Mendoza, E., Mengoni, A., Milazzo, P.M., Mingrone, F., Mirea, M., Mondelaers, W., Musumarra, A., Paradela, C., Pavlik, A., Perkowski, J., Pignatari, M., Piersanti, L., Plompen, A., Praena, J., Quesada, J.M., Rauscher, T., Reifarth, R., Riego, A., Robles, M.S., Rubbia, C., Sabaté-Gilarte, M., Sarmento, R., Saxena, A., Schillebeeckx, P., Schmidt, S., Schumann, D., Tagliente, G., Tain, J.L., Tarrío, D., Tassan-Got, L., Tsinganis, A., Valenta, S., Vannini, G., Van Rijs, I., Variale, V., Vaz, P., Ventura, A., Vermeulen, M.J., Vlachoudis, V., Vlastou, R., Wallner, A., Ware, T., Weigand, M., Weiß, C., Wynants, R., Wright, T., and Žugec, P.

Published
2017
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20. Neutron spectroscopy of ²⁶Mg states: Constraining the stellar neutron source ²²Ne(α,n)²⁵Mg

Author

Massimi, C., Altstadt, S., Andrzejewski, J., Audouin, L., Barbagallo, M., Bécares, V., Bečvář, F., Belloni, F., Berthoumieux, E., Billowes, J., Bisterzo, S., Bosnar, D., Brugger, M., Calviani, M., Calviño, F., Cano-Ott, D., Carrapiço, C., Castelluccio, D.M., Cerutti, F., Chiaveri, E., Cosentino, L., Chin, M., Clai, G., Colonna, N., Cortés, G., Cortés-Giraldo, M.A., Cristallo, S., Diakaki, M., Domingo-Pardo, C., Duran, I., Dressler, R., Eleftheriadis, C., Ferrari, A., Finocchiaro, P., Fraval, K., Ganesan, S., García, A.R., Giubrone, G., Gonçalves, I.F., González-Romero, E., Griesmayer, E., Guerrero, C., Gunsing, F., Hernández-Prieto, A., Jenkins, D.G., Jericha, E., Kadi, Y., Käppeler, F., Karadimos, D., Kivel, N., Koehler, P., Kokkoris, M., Kopecky, S., Krtička, M., Kroll, J., Lampoudis, C., Langer, C., Leal-Cidoncha, E., Lederer, C., Leeb, H., Leong, L.S., Lo Meo, S., Losito, R., Mallick, A., Manousos, A., Marganiec, J., Martínez, T., Mastinu, P.F., Mastromarco, M., Mendoza, E., Mengoni, A., Milazzo, P.M., Mingrone, F., Mirea, M., Mondelaers, W., Musumarra, A., Paradela, C., Pavlik, A., Perkowski, J., Pignatari, M., Piersanti, L., Plompen, A., Praena, J., Quesada, J.M., Rauscher, T., Reifarth, R., Riego, A., Robles, M.S., Rubbia, C., Sabaté-Gilarte, M., Sarmento, R., Saxena, A., Schillebeeckx, P., Schmidt, S., Schumann, D., Tagliente, G., Tain, J.L., Tarrío, D., Tassan-Got, L., Tsinganis, A., Valenta, S., Vannini, G., Van Rijs, I., Variale, V., Vaz, P., Ventura, A., Vermeulen, M.J., Vlachoudis, V., Vlastou, R., Wallner, A., Ware, T., Weigand, M., Weiß, C., Wynants, R., Wright, T., and Žugec, P.

Subjects
α+²², s Process, Ne, Physics, Neutron spectroscopy, ddc:530
Abstract

This work reports on accurate, high-resolution measurements of the 25Mg(n,γ)26Mg and 25Mg(n,tot) cross sections in the neutron energy range from thermal to about 300 keV, leading to a significantly improved 25Mg(n,γ)26Mg parametrization. The relevant resonances for n+25Mg were characterized from a combined R-matrix analysis of the experimental data. This resulted in an unambiguous spin/parity assignment of the corresponding excited states in 26Mg. With this information experimental upper limits of the reaction rates for 22Ne(α,n)25Mg and 22Ne(α,γ)26Mg were established, potentially leading to a significantly higher (α,n)/(α,γ) ratio than previously evaluated. The impact of these results has been studied for stellar models in the mass range 2 to 25 M⊙ .

Published
2017

21. Neutron capture cross section measurement of $^{238}$U at the CERN n_TOF facility in the energy region from 1 eV to 700 keV

Author

Mingrone, F., Massimi, C., Vannini, G., Colonna, N., Gunsing, F., Žugec, P., Altstadt, S., Andrzejewski, J., Audouin, L., Barbagallo, M., Bécares, V., Bečvář, F., Belloni, F., Berthoumieux, E., Billowes, J., Bosnar, D., Brugger, M., Calviani, M., Calviño, F., Cano-Ott, D., Carrapiço, C., Cerutti, F., Chiaveri, E., Chin, M., Cortés, G., Cortés-Giraldo, M.A., Diakaki, M., Domingo-Pardo, C., Duran, I., Dressler, R., Eleftheriadis, C., Ferrari, A., Fraval, K., Ganesan, S., García, A.R., Giubrone, G., Gonçalves, I.F., González-Romero, E., Griesmayer, E., Guerrero, C., Hernández-Prieto, A., Jenkins, D.G., Jericha, E., Kadi, Y., Käppeler, F., Karadimos, D., Kivel, N., Koehler, P., Kokkoris, M., Krtička, M., Kroll, J., Lampoudis, C., Langer, C., Leal-Cidoncha, E., Lederer, C., Leeb, H., Leong, L.S., Lo Meo, S., Losito, R., Mallick, A., Manousos, A., Marganiec, J., Martínez, T., Mastinu, P.F., Mastromarco, M., Mendoza, E., Mengoni, A., Milazzo, P.M., Mirea, M., Mondalaers, W., Paradela, C., Pavlik, A., Perkowski, J., Plompen, A., Praena, J., Quesada, J.M., Rauscher, T., Reifarth, R., Riego, A., Robles, M.S., Rubbia, C., Sabaté-Gilarte, M., Sarmento, R., Saxena, A., Schillebeeckx, P., Schmidt, S., Schumann, D., Tagliente, G., Tain, J.L., Tarrío, D., Tassan-Got, L., Tsinganis, A., Valenta, S., Variale, V., Vaz, P., Ventura, A., Vermeulen, M.J., Vlachoudis, V., Vlastou, R., Wallner, A., Ware, T., Weigand, M., Weiss, C., Wright, T., Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Institut de Physique Nucléaire d'Orsay (IPNO), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), n_TOF, Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Institut de Recherches sur les lois Fondamentales de l'Univers ( IRFU ), Commissariat à l'énergie atomique et aux énergies alternatives ( CEA ) -Université Paris-Saclay, Institut de Physique Nucléaire d'Orsay ( IPNO ), Université Paris-Sud - Paris 11 ( UP11 ) -Institut National de Physique Nucléaire et de Physique des Particules du CNRS ( IN2P3 ) -Centre National de la Recherche Scientifique ( CNRS ), and Commissariat à l'énergie atomique et aux énergies alternatives ( CEA )

Subjects
energy: high, CERN Lab, geometry, cross section, background, scintillation counter: liquid, n: time-of-flight, radiative capture, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], n: spectrum, cascade, FLUKA, uranium, n: beam, resonance, 25.40.Lw, gamma ray, 27.90.+b, [ PHYS.NEXP ] Physics [physics]/Nuclear Experiment [nucl-ex], n: capture, Nuclear Experiment, Monte Carlo, experimental results, n: flux
Abstract

International audience; The aim of this work is to provide a precise and accurate measurement of the U238(n,γ) reaction cross section in the energy region from 1 eV to 700 keV. This reaction is of fundamental importance for the design calculations of nuclear reactors, governing the behavior of the reactor core. In particular, fast reactors, which are experiencing a growing interest for their ability to burn radioactive waste, operate in the high energy region of the neutron spectrum. In this energy region most recent evaluations disagree due to inconsistencies in the existing measurements of up to 15%. In addition, the assessment of nuclear data uncertainty performed for innovative reactor systems shows that the uncertainty in the radiative capture cross section of U238 should be further reduced to 1–3% in the energy region from 20 eV to 25 keV. To this purpose, addressed by the Nuclear Energy Agency as a priority nuclear data need, complementary experiments, one at the GELINA and two at the n_TOF facility, were proposed and carried out within the 7th Framework Project ANDES of the European Commission. The results of one of these U238(n,γ) measurements performed at the n_TOF CERN facility are presented in this work. The γ-ray cascade following the radiative neutron capture has been detected exploiting a setup of two C6D6 liquid scintillators. Resonance parameters obtained from this work are on average in excellent agreement with the ones reported in evaluated libraries. In the unresolved resonance region, this work yields a cross section in agreement with evaluated libraries up to 80 keV, while for higher energies our results are significantly higher.

Published
2017

22. Neutron capture cross section measurement of $^{238}$U at the n_TOF CERN facility in the energy region from 1 eV to 700 keV

Author

Mingrone, F., Massimi, C., Vannini, G., Colonna, N., Gunsing, F., Žugec, P., Altstadt, S., Andrzejewski, J., Audouin, L., Barbagallo, M., Bécares, V., Bečvář, F., Belloni, F., Berthoumieux, E., Billowes, J., Bosnar, D., Brugger, M., Calviani, M., Calviño, F., Cano-Ott, D., Carrapiço, C., Cerutti, F., Chiaveri, E., Chin, M., Cortés, G., Cortés-Giraldo, M.A., Diakaki, M., Domingo-Pardo, C., Duran, I., Dressler, R., Eleftheriadis, C., Ferrari, A., Fraval, K., Ganesan, S., García, A.R., Giubrone, G., Gonçalves, I.F., González-Romero, E., Griesmayer, E., Guerrero, C., Hernández-Prieto, A., Jenkins, D.G., Jericha, E., Kadi, Y., Käppeler, F., Karadimos, D., Kivel, N., Koehler, P., Kokkoris, M., Krtička, M., Kroll, J., Lampoudis, C., Langer, C., Leal-Cidoncha, E., Lederer, C., Leeb, H., Leong, L.S., Lo Meo, S., Losito, R., Mallick, A., Manousos, A., Marganiec, J., Martínez, T., Mastinu, P.F., Mastromarco, M., Mendoza, E., Mengoni, A., Milazzo, P.M., Mirea, M., Mondalaers, W., Paradela, C., Pavlik, A., Perkowski, J., Plompen, A., Praena, J., Quesada, J.M., Rauscher, T., Reifarth, R., Riego, A., Robles, M.S., Rubbia, C., Sabaté-Gilarte, M., Sarmento, R., Saxena, A., Schillebeeckx, P., Schmidt, S., Schumann, D., Tagliente, G., Tain, J.L., Tarrío, D., Tassan-Got, L., Tsinganis, A., Valenta, S., Variale, V., Vaz, P., Ventura, A., Vermeulen, M.J., Vlachoudis, V., Vlastou, R., Wallner, A., Ware, T., Weigand, M., Weiß, C., and Wright, T.

Subjects
Nuclear Physics - Experiment, Nuclear Experiment
Abstract

The aim of this work is to provide a precise and accurate measurement of the 238U(n,g) reaction cross section in the energy region from 1 eV to 700 keV. This reaction is of fundamental importance for the design calculations of nuclear reactors, governing the behaviour of the reactor core. In particular, fast reactors, which are experiencing a growing interest for their ability to burn radioactive waste, operate in the high energy region of the neutron spectrum. In this energy region most recent evaluations disagree due to inconsistencies in the existing measurements of up to 15%. In addition, the assessment of nuclear data uncertainty performed for innovative reactor systems shows that the uncertainty in the radiative capture cross-section of 238U should be further reduced to 1-3% in the energy region from 20 eV to 25 keV. To this purpose, addressed by the Nuclear Energy Agency as a priority nuclear data need, complementary experiments, one at the GELINA and two at the n_TOF facility, were proposed and carried out within the 7th Framework Project ANDES of the European Commission. The results of one of these 238U(n,g) measurements performed at the n_TOF CERN facility are presented in this work. The gamma-ray cascade following the radiative neutron capture has been detected exploiting a setup of two C6D6 liquid scintillators. Resonance parameters obtained from this work are on average in excellent agreement with the ones reported in evaluated libraries. In the unresolved resonance region, this work yields a cross section in agreement with evaluated libraries up to 80 keV, while for higher energies our results are significantly higher. The aim of this work is to provide a precise and accurate measurement of the U238(n,γ) reaction cross section in the energy region from 1 eV to 700 keV. This reaction is of fundamental importance for the design calculations of nuclear reactors, governing the behavior of the reactor core. In particular, fast reactors, which are experiencing a growing interest for their ability to burn radioactive waste, operate in the high energy region of the neutron spectrum. In this energy region most recent evaluations disagree due to inconsistencies in the existing measurements of up to 15%. In addition, the assessment of nuclear data uncertainty performed for innovative reactor systems shows that the uncertainty in the radiative capture cross section of U238 should be further reduced to 1–3% in the energy region from 20 eV to 25 keV. To this purpose, addressed by the Nuclear Energy Agency as a priority nuclear data need, complementary experiments, one at the GELINA and two at the n_TOF facility, were proposed and carried out within the 7th Framework Project ANDES of the European Commission. The results of one of these U238(n,γ) measurements performed at the n_TOF CERN facility are presented in this work. The γ-ray cascade following the radiative neutron capture has been detected exploiting a setup of two C6D6 liquid scintillators. Resonance parameters obtained from this work are on average in excellent agreement with the ones reported in evaluated libraries. In the unresolved resonance region, this work yields a cross section in agreement with evaluated libraries up to 80 keV, while for higher energies our results are significantly higher. The aim of this work is to provide a precise and accurate measurement of the 238U(n,g) reaction cross section in the energy region from 1 eV to 700 keV. This reaction is of fundamental importance for the design calculations of nuclear reactors, governing the behaviour of the reactor core. In particular, fast reactors, which are experiencing a growing interest for their ability to burn radioactive waste, operate in the high energy region of the neutron spectrum. In this energy region most recent evaluations disagree due to inconsistencies in the existing measurements of up to 15%. In addition, the assessment of nuclear data uncertainty performed for innovative reactor systems shows that the uncertainty in the radiative capture cross-section of 238U should be further reduced to 1-3% in the energy region from 20 eV to 25 keV. To this purpose, addressed by the Nuclear Energy Agency as a priority nuclear data need, complementary experiments, one at the GELINA and two at the n_TOF facility, were proposed and carried out within the 7th Framework Project ANDES of the European Commission. The results of one of these 238U(n,g) measurements performed at the n_TOF CERN facility are presented in this work. The gamma-ray cascade following the radiative neutron capture has been detected exploiting a setup of two C6D6 liquid scintillators. Resonance parameters obtained from this work are on average in excellent agreement with the ones reported in evaluated libraries. In the unresolved resonance region, this work yields a cross section in agreement with evaluated libraries up to 80 keV, while for higher energies our results are significantly higher.

Published
2016

23. $^{62}$Ni($n,\gamma$) and $^{63}$Ni($n,\gamma$) cross sections measured at n_TOF/CERN

Author

Lederer, C., Massimi, C., Berthoumieux, E., Colonna, N., Dressler, R., Guerrero, C., Gunsing, F., Käppeler, F., Kivel, N., Pignatari, M., Reifarth, R., Schumann, D., Wallner, A., Altstadt, S., Andriamonje, S., Andrzejewski, J., Audouin, L., Barbagallo, M., Bécares, V., Bečvář, F., Belloni, F., Berthier, B., Billowes, J., Boccone, V., Bosnar, D., Brugger, M., Calviani, M., Calviño, F., Cano-Ott, D., Carrapiço, C., Cerutti, F., Chiaveri, E., Chin, M., Cortés, G., Cortés-Giraldo, M.A., Dillmann, I., Domingo-Pardo, C., Duran, I., Dzysiuk, N., Eleftheriadis, C., Fernández-Ordóñez, M., Ferrari, A., Fraval, K., Ganesan, S., García, A.R., Giubrone, G., Gómez-Hornillos, M.B., Gonçalves, I.F., González-Romero, E., Gramegna, F., Griesmayer, E., Gurusamy, P., Harrisopulos, S., Heil, M., Ioannides, K., Jenkins, D.G., Jericha, E., Kadi, Y., Karadimos, D., Korschinek, G., Krtička, M., Kroll, J., Langer, C., Lebbos, E., Leeb, H., Leong, L.S., Losito, R., Lozano, M., Manousos, A., Marganiec, J., Marrone, S., Martinez, T., Mastinu, P.F., Mastromarco, M., Meaze, M., Mendoza, E., Mengoni, A., Milazzo, P.M., Mingrone, F., Mirea, M., Mondalaers, W., Paradela, C., Pavlik, A., Perkowski, J., Plag, R., Plompen, A., Praena, J., Quesada, J.M., Rauscher, T., Riego, A., Roman, F., Rubbia, C., Sarmento, R., Schillebeeckx, P., Schmidt, S., Tagliente, G., Tain, J.L., Tarrío, D., Tassan-Got, L., Tsinganis, A., Tlustos, L., Valenta, S., Vannini, G., Variale, V., Vaz, P., Ventura, A., Vermeulen, M.J., Versaci, R., Vlachoudis, V., Vlastou, R., Ware, T., Weigand, M., Weiß, C., Wright, T.J., and Žugec, P.

Subjects
Astrophysics::High Energy Astrophysical Phenomena, Nuclear Physics - Experiment, Nuclear Experiment
Abstract

The cross section of the $^{62}$Ni($n,\gamma$) reaction was measured with the time-of-flight technique at the neutron time-of-flight facility n_TOF at CERN. Capture kernels of 42 resonances were analyzed up to 200~keV neutron energy and Maxwellian averaged cross sections (MACS) from $kT=5-100$ keV were calculated. With a total uncertainty of 4.5%, the stellar cross section is in excellent agreement with the the KADoNiS compilation at $kT=30$ keV, while being systematically lower up to a factor of 1.6 at higher stellar temperatures. The cross section of the $^{63}$Ni($n,\gamma$) reaction was measured for the first time at n_TOF. We determined unresolved cross sections from 10 to 270 keV with a systematic uncertainty of 17%. These results provide fundamental constraints on $s$-process production of heavier species, especially the production of Cu in massive stars, which serve as the dominant source of Cu in the solar system. The cross section of the Ni62(n,γ) reaction was measured with the time-of-flight technique at the neutron time-of-flight facility n_TOF at CERN. Capture kernels of 42 resonances were analyzed up to 200 keV neutron energy and Maxwellian averaged cross sections (MACS) from kT= 5–100 keV were calculated. With a total uncertainty of 4.5%, the stellar cross section is in excellent agreement with the the KADoNiS compilation at kT=30 keV, while being systematically lower up to a factor of 1.6 at higher stellar temperatures. The cross section of the Ni63(n,γ) reaction was measured for the first time at n_TOF. We determined unresolved cross sections from 10 to 270 keV with a systematic uncertainty of 17%. These results provide fundamental constraints on s-process production of heavier species, especially the production of Cu in massive stars, which serve as the dominant source of Cu in the solar system. The cross section of the $^{62}$Ni($n,\gamma$) reaction was measured with the time-of-flight technique at the neutron time-of-flight facility n_TOF at CERN. Capture kernels of 42 resonances were analyzed up to 200~keV neutron energy and Maxwellian averaged cross sections (MACS) from $kT=5-100$ keV were calculated. With a total uncertainty of 4.5%, the stellar cross section is in excellent agreement with the the KADoNiS compilation at $kT=30$ keV, while being systematically lower up to a factor of 1.6 at higher stellar temperatures. The cross section of the $^{63}$Ni($n,\gamma$) reaction was measured for the first time at n_TOF. We determined unresolved cross sections from 10 to 270 keV with a systematic uncertainty of 17%. These results provide fundamental constraints on $s$-process production of heavier species, especially the production of Cu in massive stars, which serve as the dominant source of Cu in the solar system.

Published
2014

24. Fission Fragment Angular Distribution measurements of235U and238U at CERN n_TOF facility

Author

Leal-Cidoncha, E., primary, Durán, I., additional, Paradela, C., additional, Tarrío, D., additional, Leong, L.S., additional, Tassan-Got, L., additional, Audouin, L., additional, Altstadt, S., additional, Andrzejewski, J., additional, Barbagallo, M., additional, Bécares, V., additional, Bečvář, F., additional, Belloni, F., additional, Berthoumieux, E., additional, Billowes, J., additional, Boccone, V., additional, Bosnar, D., additional, Brugger, M., additional, Calviani, M., additional, Calviño, F., additional, Cano-Ott, D., additional, Carrapiço, C., additional, Cerutti, F., additional, Chiaveri, E., additional, Chin, M., additional, Colonna, N., additional, Cortés, G., additional, Cortés-Giraldo, M.A., additional, Diakaki, M., additional, Domingo-Pardo, C., additional, Dressler, R., additional, Dzysiuk, N., additional, Eleftheriadis, C., additional, Ferrari, A., additional, Fraval, K., additional, Ganesan, S., additional, García, A.R., additional, Giubrone, G., additional, Gómez-Hornillos, M.B., additional, Gonçalves, I.F., additional, González-Romero, E., additional, Griesmayer, E., additional, Guerrero, C., additional, Gunsing, F., additional, Gurusamy, P., additional, Hernández-Prieto, A., additional, Jenkins, D.G., additional, Jericha, E., additional, Kadi, Y., additional, Käppeler, F., additional, Karadimos, D., additional, Kivel, N., additional, Koehler, P., additional, Kokkoris, M., additional, Krtička, M., additional, Kroll, J., additional, Lampoudis, C., additional, Langer, C., additional, Lederer, C., additional, Leeb, H., additional, Lo Meo, S., additional, Losito, R., additional, Mallick, A., additional, Manousos, A., additional, Marganiec, J., additional, Martínez, T., additional, Massimi, C., additional, Mastinu, P.F., additional, Mastromarco, M., additional, Meaze, M., additional, Mendoza, E., additional, Mengoni, A., additional, Milazzo, P.M., additional, Mingrone, F., additional, Mirea, M., additional, Mondelaers, W., additional, Pavlik, A., additional, Perkowski, J., additional, Plompen, A., additional, Praena, J., additional, Quesada, J.M., additional, Rauscher, T., additional, Reifarth, R., additional, Riego, A., additional, Robles, M.S., additional, Roman, F., additional, Rubbia, C., additional, Sabaté-Gilarte, M., additional, Sarmento, R., additional, Saxena, A., additional, Schillebeeckx, P., additional, Schmidt, S., additional, Schumann, D., additional, Tagliente, G., additional, Tain, J.L., additional, Tsinganis, A., additional, Valenta, S., additional, Vannini, G., additional, Variale, V., additional, Vaz, P., additional, Ventura, A., additional, Versaci, R., additional, Vermeulen, M.J., additional, Vlachoudis, V., additional, Vlastou, R., additional, Wallner, A., additional, Ware, T., additional, Weigand, M., additional, Weiß, C., additional, Wright, T., additional, and Žugec, P., additional

Published
2016
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25. Neutron capture cross section of unstable 63Ni: implications for stellar nucleosynthesis

Author

Lederer, C., Massimi, C., Altstadt, S., Andrzejewski, J., Audouin, L., Barbagallo, M., Becares, V., Be cv a r, F., Belloni, F., Berthoumieux, E., Billowes, J., Boccone, V., Bosnar, Damir, Brugger, M., Calviani, M., Calvino, F., Cano-Ott, D., Carrapi co, C., Cerutti, F., Chiaveri, E., Chin, M., Colonna, N., Cort es, G., Cort es-Giraldo, M.A., Diakaki, M., Domingo-Pardo, C., Duran, I., Dressler, R., Dzysiuk, N., Eleftheriadis, C., Ferrari, A., Fraval, K., Ganesan, S., Garc ia, A.R., Giubrone, G., G omez-Hornillos, E., Gon calves, I.F., Gonzalez-Romero, E., Griesmayer, E., Guerrero, C., Gunsing, F., Gurusamy, P., Jenkins, D.K., Jericha, E., Kadi, Y., Kappeler, F., Karadimos, D., Kivel, N., Koehler, P., Kokkoris, M., Korschinek, G., Krti cka, M., Kroll, J., Langer, C., Leeb, H., Leong, L.S., Losito, R., Manousos, A., Marganiec, J., Mart nez, T., Mastinu, P.F., Mastromarco, M., Meaze, M., Mendoza, E., Mengoni, A., Milazzo, P.M., Mingrone, F., Mirea, M., Mondelaers, W., Paradela, C., Pavlik, A., Perkowski, J., Pignatari, M., Plompen, A., Praena, J., Quesada, J.M., Rauscher, T., Reifarth, R., Riego, A., Roman, F., Rubbia, C., Sarmento, R., Schillebeeckx, P., Schmidt, S., Schumann, D., Tagliente, G., Tain, J.L., Tarr o, D., Tassan-Got, L., Tsinganis, A., Valenta, S., Vannini, G, Variale, V., Vaz, P., Ventura, A., Versaci, R., Vermeulen, M.J., Vlachoudis, v., Vlastou, R., Wallner, A., Ware, T., Weigand, M., Weis , C., Wright, T.J., Žugec, Petar, C. Lederer, C. Massimi, S. Altstadt, J. Andrzejewski, L. Audouin, M. Barbagallo, V. Bécare, F. Bečvář, F. Belloni, E. Berthoumieux, J. Billowe, V. Boccone, D. Bosnar, M. Brugger, M. Calviani, F. Calviño, D. Cano-Ott, C. Carrapiço, F. Cerutti, E. Chiaveri, M. Chin, N. Colonna, G. Corté, M. A. Cortés-Giraldo, M. Diakaki, C. Domingo-Pardo, I. Duran, R. Dressler, N. Dzysiuk, C. Eleftheriadi, A. Ferrari, K. Fraval, S. Ganesan, A. R. García, G. Giubrone, M. B. Gómez-Hornillo, I. F. Gonçalve, E. González-Romero, E. Griesmayer, C. Guerrero, F. Gunsing, P. Gurusamy, D. G. Jenkin, E. Jericha, Y. Kadi, F. Käppeler, D. Karadimo, N. Kivel, P. Koehler, M. Kokkori, G. Korschinek, M. Krtička, J. Kroll, C. Langer, H. Leeb, L. S. Leong, R. Losito, A. Manouso, J. Marganiec, T. Martínez, P. F. Mastinu, M. Mastromarco, M. Meaze, E. Mendoza, A. Mengoni, P. M. Milazzo, F. Mingrone, M. Mirea, W. Mondelaer, C. Paradela, A. Pavlik, J. Perkowski, M. Pignatari, A. Plompen, J. Praena, J. M. Quesada, T. Rauscher, R. Reifarth, A. Riego, F. Roman, C. Rubbia, R. Sarmento, P. Schillebeeckx, S. Schmidt, D. Schumann, G. Tagliente, J. L. Tain, D. Tarrío, L. Tassan-Got, A. Tsingani, S. Valenta, G. Vannini, V. Variale, P. Vaz, A. Ventura, R. Versaci, M. J. Vermeulen, V. Vlachoudi, R. Vlastou, A. Wallner, T. Ware, M. Weigand, C. Weiß, T. J. Wright, P. Žugec, Institut de Physique Nucléaire d'Orsay (IPNO), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, nTOF, and Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)

Subjects
NUCLEOSYNTHESIS, radiative caputre, resonance reactions, neutron, s-process (nuclear astrophyiscs), Astrophysics::High Energy Astrophysical Phenomena, FOS: Physical sciences, Astrophysics::Cosmology and Extragalactic Astrophysics, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Astrophysics - Solar and Stellar Astrophysics, Astrophysics::Solar and Stellar Astrophysics, Nuclear Physics - Experiment, Nuclear Experiment (nucl-ex), NEUTRON CAPTURE, CROSS SECTION MEASUREMENTS, Nuclear Experiment, S-PROCESS, Solar and Stellar Astrophysics (astro-ph.SR), Astrophysics::Galaxy Astrophysics
Abstract

The $^{63}$Ni($n, \gamma$) cross section has been measured for the first time at the neutron time-of-flight facility n\_TOF at CERN from thermal neutron energies up to 200 keV. In total, capture kernels of 12 (new) resonances were determined. Maxwellian Averaged Cross Sections were calculated for thermal energies from kT = 5 keV to 100 keV with uncertainties around 20%. Stellar model calculations for a 25 M$_\odot$ star show that the new data have a significant effect on the $s$-process production of $^{63}$Cu, $^{64}$Ni, and $^{64}$Zn in massive stars, allowing stronger constraints on the Cu yields from explosive nucleosynthesis in the subsequent supernova. The Ni63(n,γ) cross section has been measured for the first time at the neutron time-of-flight facility n_TOF at CERN from thermal neutron energies up to 200 keV. In total, capture kernels of 12 (new) resonances were determined. Maxwellian averaged cross sections were calculated for thermal energies from kT=5–100 keV with uncertainties around 20%. Stellar model calculations for a 25M⊙ star show that the new data have a significant effect on the s-process production of Cu63, Ni64, and Zn64 in massive stars, allowing stronger constraints on the Cu yields from explosive nucleosynthesis in the subsequent supernova. The $^{63}$Ni($n, \gamma$) cross section has been measured for the first time at the neutron time-of-flight facility n\_TOF at CERN from thermal neutron energies up to 200 keV. In total, capture kernels of 12 (new) resonances were determined. Maxwellian Averaged Cross Sections were calculated for thermal energies from kT = 5 keV to 100 keV with uncertainties around 20%. Stellar model calculations for a 25 M$_\odot$ star show that the new data have a significant effect on the $s$-process production of $^{63}$Cu, $^{64}$Ni, and $^{64}$Zn in massive stars, allowing stronger constraints on the Cu yields from explosive nucleosynthesis in the subsequent supernova.

Published
2013

26. The data acquisition system of the neutron time-of-flight facility n- TOF at CERN

Author

Abbondanno, U., Aerts, G., Alvarez-Velarde, F., Alvarez, H., Andriamonje, S., Andrzejewski, J., Badurek, G., Baumann, P., Becvar, F., Benlliure, J., Berthomieux, E., Betev, B., Calvino, P., Cano-Ott, D., Capote, R., Cennini, P., Chepel, V., Chiaveri, E., Colonna, N., Cortes, G., Cortina, D., Couture, A., Cox, J., Dababneh, S., David, S., Dolfini, R., Domingo-Pardo, C., Duran, I., Eleftheriadis, C., Embid-Segura, M., Ferrant, L., Ferrari, Anthony, Ferreira-Marques, R., Frais-Koelbl, H., Furman, W.I., Goncalves, I.F., Gonzalez-Romero, E., Goverdovski, A., Gramegna, F., Griesmayer, E., Gunsing, F., Haas, B., Haight, R., Heil, M., Herrera-Martinez, A., Isaev, S., Jericha, E., Käppeler, F., Kadi, Y., Kerveno, M., Ketlerov, V., Koehler, P.E., Konovalov, V., Kossionides, E., Krticka, M., Leeb, H., Lindote, A., Lopes, M.I., Lozano, M., Lukic, S., Marganiec, J., Marrone, S., Martinez-Val, J., Mastinu, P.F., Mengoni, A., Milazzo, P.M., Molina-Coballes, A., Moreau, C., Mosconi, M., Neves, F., Oberhummer, H., O'Brien, S., Pancin, J., Papaevangelou, T., Paradela, C., Pavlik, A., Pavlopoulos, P., Perlado, J.M., Perrot, L., Peskov, V., Plag, R., Plompen, A., Plukis, A., Poch, A., Policarpo, A., Pretel, C., Quesada, J.M., Rapp, W., Rauscher, T., Reifarth, R., Rosetti, M., Rubbia, C., Rudolf, G., Rulhusen, P., Salgado, J., Schäfer, E., Soares, J.C., Stephan, C., Tagliente, G., Tain, J.L., Tassan-Got, L., Tavora, L.M.N., Terlizzi, R., Vannini, G., Vaz, P., Ventura, A., Villamarin-Fernandez, D., Vincente-Vincente, M., Vlachoudis, V., Voss, F., Wendler, H., Wiescher, M., Wisshak, K., Universitat Politècnica de Catalunya. Departament de Física i Enginyeria Nuclear, Universitat Politècnica de Catalunya. GREENER - Grup de recerca d'estudis energètics i de les radiacions, U.Abbondanno, G. Aert, F.Alvarez, H.Alvarez, S.Andriamonje, J.Andrzejewski, G.Badurek, P.Baumann, F.Becvar, J. Benlliure, E. Berthomieux, B.Betev, F. Calvino, D.Cano-Ott, R.Capote, P.Cennini, V.Chepel, E.Chiaveri, N.Colonna, G.Corte, D.Cortina, A.Couture, J.Cox, S.Dababneh, S.David, R.Dolfini, C.Domingo-Pardo, I.Duran, M.Embid-Segura, L.Ferrant, A.Ferrari, R.Ferreira-Marque, H.Frais-Koelbl, W.Furman, I.Goncalve, E.Gonzalez-Romero, A.Goverdovski, F.Gramegna, E.Griesmayer, F.Gunsing, B.Haa, R.Haight, M.Heil, A.Herrera-Martinez, S.Isaev, E.Jericha, Y.Kadi, F.Kappeler, M.Kerveno, V.Ketlerov, P.E.Koehlera, V.Konovalov, M.Krticka, H.Leeb, A.Lindote, M.I.Lope, M. Lozano, S.Lukic, J.Marganiec, S.Marrone, J.Martinez-Val, P.Mastinu, A.Mengoni, P.M.Milazzo, A.Molina-Coballe, C.Moreau, M.Mosconi, F.Neve, H.Oberhummer, S.O'Brien, J.Pancin, T.Papaevangelou, C.Paradela, A.Pavlik, P.Pavlopoulo, J.M.Perlado, L.Perrot, V.Peskov, R.Plag, A.Plompen, A.Pluki, A. Poch, A.Policarpo, C.Pretel, J.M.Quesada, W. Rapp, T. Rauscher, R. Reifarth, M. Rosetti, C. Rubbia, G. Rudolf, P. Rullhusena, J. Salgado, E. Schaeffer, J.C. Soare, C. Stephan, G. Tagliente, J.L. Tain, L. Tassan-Got, L.M.N. Tavora, R. Terlizzi, G. Vannini, P. Vaz, A. Ventura, D. Villamarin-Fernandez, M. Vincente-Vincente, V. Vlachoudi, F. Vo, H. Wendler, M. Wiescher, K. Wisshak., Institut de Recherches Subatomiques (IReS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Cancéropôle du Grand Est-Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Nucléaire d'Orsay (IPNO), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and TOF

Subjects
Nuclear and High Energy Physics, Memory buffer register, TheoryofComputation_COMPUTATIONBYABSTRACTDEVICES, Radiative capture, Computer interfaces, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, ComputingMethodologies_ARTIFICIALINTELLIGENCE, Radiació, Nuclear physics--Experiments, Nuclear magnetic resonance, Data acquisition, Neutron flux, 0103 physical sciences, Pulse shape analysis, Neutron, 010306 general physics, Instrumentation, Physics, Large Hadron Collider, Física [Àrees temàtiques de la UPC], 010308 nuclear & particles physics, business.industry, 25.40.Lw, 25.40.Ny, 29.50.+v, 29.85.+c, Neutron time-of-flight spectroscopy, TheoryofComputation_GENERAL, Dead time, Flash-ADC, Time of flight, Neutron capture, Física nuclear -- Experiments, ComputingMethodologies_PATTERNRECOGNITION, business, Computer hardware
Abstract

The n_TOF facility at CERN has been designed for the measurement of neutron capture, fission and (n; n) crosssections with high accuracy. This requires a flexible and—due to the high instantaneous neutron flux—almost dead time free data acquisition system. A scalable and versatile data solution has been designed based on 8-bit flash-ADCs with sampling rates up to 2GHz and 8 Mbyte memory buffer. The software is written in C and Cþþand is running on PCs equipped with RedHat Linux.

Published
2005

27. Time-energy relation of the n_TOF neutron beam: Energy standards revisited

Author

Lorusso, G. Colonna, N. Marrone, S. Tagliente, G. Heil, M. Cano-Ott, D. Mosconi, M. Moreau, C. Mengoni, A. Abbondanno, U. Aerts, G. Alvarez-Pol, H. Alvarez-Velarde, F. Andriamonje, S. Andrzejewski, J. Angelopoulos, A. Assimakopoulos, P. Badurek, G. Baumann, P. Bečvár, F. Benlliure, J. Berthomieux, E. Bisceglie, E. Calviño, P. Capote, R. Cennini, P. Chepel, V. Chiaveri, E. Coceva, C. Cortes, G. Cortina, D. Couture, A. Cox, J. Dababneh, S. Dahlfors, M. David, S. Dolfini, R. Domingo-Pardo, C. Duran, I. Eleftheriadis, C. Embid-Segura, M. Ferrant, L. Ferrari, A. Ferreira-Marques, R. Frais-Koelbl, H. Furman, W.I. Goncalves, I.F. Gonzalez-Romero, E. Goverdovski, A. Gramegna, F. Griesmayer, E. Gunsing, F. Haas, B. Haight, R. Herrera-Martinez, A. Ioannides, K.G. Isaev, S. Jericha, E. Käppeler, F. Kadi, Y. Karamanis, D. Ketlerov, V. Kitis, G. Koehler, P.E. Konovalov, V. Kossionides, E. Krticka, M. Leeb, H. Lindote, A. Lopes, M.I. Lozano, M. Lukic, S. Marganiec, J. Mastinu, P.F. Milazzo, P.M. Molina-Coballes, A. Neves, F. Oberhummer, H. O'Brien, S. Pancin, J. Paradela, C. Pavlik, A. Pavlopoulos, P. Perrot, L. Peskov, V. Plag, R. Plompen, A. Plukis, A. Poch, A. Policarpo, A. Pretel, C. Quesada, J.M. Rapp, W. Rauscher, T. Reifarth, R. Rosetti, M. Rubbia, C. Rudolf, G. Rullhusen, P. Salgado, J. Savvidis, E. Soares, J.C. Stephan, C. Tain, J.L. Tassan-Got, L. Tavora, L.M.N. Terlizzi, R. Tsangas, N. Vannini, G. Vaz, P. Ventura, A. Villamarin, D. Vincente, M.C. Vlachoudis, V. Vlastou, R. Voss, F. Wendler, H. Wiescher, M. Wisshak, K.

Subjects
Physics::Accelerator Physics, Nuclear Experiment
Abstract

The accurate determination of neutron cross-sections as a function of the neutron energy at a time-of-flight facility requires a precise knowledge of the time-energy relation for the neutron beam. For the n_TOF neutron beam at CERN, produced by spallation of high-energy protons on a Pb target, the time-energy relation is connected to the production mechanism and to the subsequent moderation process. A calibration of the neutron energy scale is proposed based on detailed Monte Carlo simulations of the facility. This time-energy relation has been experimentally validated by means of dedicated measurements of standard energy resonances, from 1eV to approximately 1MeV. On the basis of the present measurements, it is proposed to correct the energy of the 1.3eV resonance of 193Ir, which is commonly considered as an energy standard. © 2004 Elsevier B.V. All rights reserved.

Published
2004

28. A low-mass neutron flux monitor for the n_TOF facility at CERN

Author

Mastinu, P.F. Abbondanno, U. Aerts, G. Alvarez, H. Andriamonje, S. Angelopoulos, A. Assimakopoulos, P. Bacri, C.O. Badurek, G. Baumann, P. Bečvář, F. Beer, H. Benlliure, J. Berthier, B. Berthomieux, E. Boffi, S. Borcea, C. Boscolo-Marchi, E. Bustreo, N. Calviño, P. Cano-Ott, D. Capote, R. Carlson, P. Cennini, P. Chepel, V. Chiaveri, E. Coceva, C. Colonna, N. Cortes, G. Cortina, D. Couture, A. Cox, J. Dababneh, S. Dahlfors, M. David, S. Dolfini, R. Domingo-Pardo, C. Duran, I. Eleftheriadis, C. Embid-Segura, M. Ferrant, L. Ferrari, A. Ferreira-Lourenco, L. Ferreira-Marques, R. Frais-Koelbl, H. Furman, W.I. Giomataris, Y. Goncalves, I.F. Gonzalez-Romero, E. Goverdovski, A. Gramegna, F. Griesmayer, E. Gunsing, F. Haight, R. Heil, M. Herrera-Martinez, A. Ioannides, K.G. Janeva, N. Jericha, E. Käppeler, F. Kadi, Y. Karamanis, D. Kelic, A. Ketlerov, V. Kitis, G. Koehler, P.E. Konovalov, V. Kossionides, E. Lacoste, V. Leeb, H. Lindote, A. Lopes, M.I. Loriggiola, M. Lozano, M. Lukic, S. Markov, S. Marigo, S. Marrone, S. Martinez-Val, J. Mengoni, A. Milazzo, P.M. Minguez, E. Molina-Coballes, A. Moreau, C. Neves, F. Oberhummer, H. O'Brien, S. Pancin, J. Papaevangelou, T. Paradela, C. Pavlik, A. Pavlopoulos, P. Perez-Parra, A. Perlado, J.M. Perrot, L. Peskov, V. Plag, R. Plompen, A. Plukis, A. Poch, A. Policarpo, A. Pretel, C. Quesada, J.M. Radici, M. Raman, S. Rapp, W. Rauscher, T. Reifarth, R. Rejmund, F. Rosetti, M. Rubbia, C. Rudolf, G. Rullhusen, P. Salgado, J. Savvidis, E. Soares, J.C. Stephan, C. Tagliente, G. Tain, J.L. Tapia, C. Tassan-Got, L. Tavora, L.M.N. Terlizzi, R. Terrani, M. Tsangas, N. Vannini, G. Vaz, P. Ventura, A. Villamarin-Fernandez, D. Vincente-Vincente, M. Vlachoudis, V. Vlastou, R. Voss, F. Wendler, H. Wiescher, M. Wisshak, K. Zanini, L.

Subjects
Physics::Instrumentation and Detectors, Astrophysics::High Energy Astrophysical Phenomena, Physics::Accelerator Physics, Nuclear Experiment
Abstract

A small-mass system has been developed for monitoring the flux of neutrons with energy up to 1 MeV at the new time-of-flight facility at CERN, n_TOF. The monitor is based on a thin Mylar foil with a 6Li deposit, placed in the neutron beam, and an array of Silicon detectors, placed outside the beam, for detecting the products of the 6Li(n, α)3H reaction. The small amount of material on the beam ensures a minimal perturbation of the flux and minimizes the background related to scattered neutrons. Moreover, a further reduction of the γ-ray background has been obtained by constructing the scattering chamber hosting the device in carbon fibre. A detailed description of the flux monitor is here presented, together with the characteristics of the device, in terms of efficiency, resolution and induced background. The use of the monitor in the measurement of neutron capture cross-sections at n-TOF is discussed.

Published
2004

29. 238U(n,γ) reaction cross section measurement with C6D6detectors at the n_TOF CERN facility.

Author

Mingrone, F., primary, Massimi, C., additional, Vannini, G., additional, Altstadt, S., additional, Andrzejewski, J., additional, Audouin, L., additional, Barbagallo, M., additional, Bécares, V., additional, Bečvář, F., additional, Belloni, F, additional, Berthoumieux, E., additional, Billowes, J., additional, Bosnar, D., additional, Brugger, M., additional, Calviani, M., additional, Calviño, F., additional, Cano-Ott, D., additional, Carrapiço, C., additional, Cerutti, F., additional, Chiaveri, E., additional, Chin, M., additional, Colonna, N., additional, Cortés, G., additional, Cortés-Giraldo, M.A., additional, Diakaki, M., additional, Domingo-Pardo, C., additional, Duran, I., additional, Dressler, R., additional, Eleftheriadis, C., additional, Ferrari, A., additional, Fraval, K., additional, Ganesan, S., additional, García, A.R., additional, Giubrone, G., additional, Gonçalves, I.F., additional, González-Romero, E., additional, Griesmayer, E., additional, Guerrero, C., additional, Gunsing, F., additional, Hernández-Prieto, A., additional, Jenkins, D.G., additional, Jericha, E., additional, Kadi, Y., additional, Käppeler, F., additional, Karadimos, D., additional, Kivel, N., additional, Koehler, P., additional, Krtička, M., additional, Kroll, J., additional, Lampoudis, C., additional, Langer, C., additional, Leal-Cidoncha, E., additional, Lederer, C., additional, Leeb, H., additional, Leong, L.S., additional, Losito, R., additional, Mallick, A., additional, Manousos, A., additional, Marganiec, J., additional, Martínez, T., additional, Mastinu, P.F., additional, Mastromarco, M., additional, Mendoza, E., additional, Mengoni, A., additional, Milazzo, P.M., additional, Mirea, M., additional, Mondalaers, W., additional, Paradela, C., additional, Pavlik, A., additional, Perkowski, J., additional, Plompen, A., additional, Praena, J., additional, Quesada, J.M., additional, Rauscher, T., additional, Reifarth, R., additional, Riego, A., additional, Robles, M.S., additional, Rubbia, C., additional, Sabaté-Gilarte, M., additional, Sarmento, R., additional, Saxena, A., additional, Schillebeeckx, P., additional, Schmidt, S., additional, Schumann, D., additional, Tagliente, G., additional, Tain, J.L., additional, Tarrío, D., additional, Tassan-Got, L., additional, Tsinganis, A., additional, Valenta, S., additional, Variale, V., additional, Vaz, P., additional, Ventura, A., additional, Vermeulen, M.J., additional, Vlachoudis, V., additional, Vlastou, R., additional, Wallner, A., additional, Ware, T., additional, Weigand, M., additional, Weiß, C., additional, Wright, T., additional, and Žugec, P., additional

Published
2014
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30. Energetic proton emission in heavy ion collisions at intermediate energy: Pre-equilibrium and cooperative effects

Author

Sapienza, P., Coniglione, R., Colonna, M., Migneco, E., Agodi, C., Alba, R., Bellia, G., Del Zoppo, A., Finocchiaro, P., Greco, V., Loukachine, K., Maiolino, C., Piattelli, P., Santonocito, D., Ventura, P.G., Blumenfeld, Y., Bruno, M., Colonna, N., D'Agostino, M., Fabbietti, L., Fiandri, M.L., Gramegna, F., Iori, I., Margagliotti, G.V., Mastinu, P.F., Milazzo, P.M., Moroni, A., Rui, R., Scarpaci, J-A., Vannini, G., Institut de Physique Nucléaire d'Orsay (IPNO), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), P., Sapienza, R., Coniglione, M., Colonna, E., Migneco, C., Agodi, R., Alba, G., Bellia, A., Del Zoppo, P., Finocchiaro, V., Greco, K., Loucakine, C., Maiolino, P., Piattelli, D., Santonocito, P. G., Ventura, Y., Blumenfeld, M., Bruno, N., Colonna, M., D'Agostino, L., Fabbietti, M. L., Fiandri, F., Gramegna, I., Iori, Margagliotti, Giacomo, P. F., Mastinu, P. M., Milazzo, A., Moroni, Rui, Rinaldo, J. A., Scarpaci, G., Vannini, and Robert, Suzanne

Subjects
Physics, Nuclear and High Energy Physics, Proton, [PHYS.NEXP] Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Theory, Hadron, General Physics and Astronomy, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], pre-equilibrium, Nuclear physics, Intermediate energy, subthreshold emission, Available energy, Heavy ion, Multiplicity (chemistry), Proton emission, Atomic physics, Nuclear Experiment, Nucleon
Abstract

Energetic proton emission has been investigated as a function of the centrality in the reaction Ni-58 + Ni-58 at 30 AMeV. Protons with energy extending up to a relevant fraction of the total available energy in the reaction were measured and studied. The dependence on the reaction centrality has been extensively investigated and data have been compared with the results of microscopic transport calculations. The more striking observation concerns the extremely energetic proton (E-P(NN) greater than or equal to 130 MeV) multiplicity which is found to increase almost quadratically with the number of participant nucleons thus indicating the onset of a mechanism beyond one and two-body dynamics.

Published
2002

31. Neutron reactions and nuclear cosmo-chronology

Author

Universitat Politècnica de Catalunya. Departament de Física i Enginyeria Nuclear, Universitat Politècnica de Catalunya. GREENER - Grup de recerca d'estudis energètics i de les radiacions, Tagliente, G., Taín Enríquez, José Luis, Ketlerov, V., Tassan-Got, L., Tavora, L., Konovalov, V., Salgado, J., Koehler, P., Sarchiapone, L., Krticka, M., Savvidis, I., Rauscher, T., Reifarth, R., Plompen, A., Perrot, L., Pavlopoulos, P., Papadopoulos, C., Paradela, C., Patronis, N., Pavlik, A., O'Brien, S., Baumann, P., Pancin, J., Papachristodoulou, C., Neves, F., Moreau, C., Oshima, M., Oberhummer, H., Berthoumieux, E., Becvar, F., Mastinu, P.F., Milazzo, P.M., Badurek, G., Marques, L., Audouin, L., Marrone, S., Assimakopoulos, P., Lukic, S., Andrzejewski, J., Marganiec, J., Kossionides, E., Andriamonje, S., Álvarez-Velarde, F., Álvarez-Pol, H., Bisterzo, S., Lozano, M, Lopes, I., Lindote, A., Leeb, H., Lamboudis, C., Stephan, C., Vannini, G., Vaz, P., Abbondanno, U., Isaev, S., Mosconi, M., Jericha, E., Heil, M., Kadi, Y., Kappeler, F., Karamanis, D., Mengoni, A., Karadimos, D., Plag, R., Kerveno, M., Fujii, K., Aerts, G., Terlizzi, R., Wendler, H., Wiescher, M., Voss, F., Walter, S., Igashira, M., Vlachoudis, V., Herrera-Martinez, A., Vlastou, R., Haight, R., Villamarin, D., Haas, B., Vincente, M.C., Wisshak, K., Goverdovski, A., Ventura, A., Gramegna, F., Goncalves, I., Gonzalez-Romero, E., Gunsing, F., Griesmayer, E., Guerrero, C., Embid-Segura, M., Ferrari, A., Ferrant, L., Domingo-Pardo, C., Dridi, W., Duran, I., Eleftheriadis, C., Dahlfors, M., David, S., Dillmann, I., Dolfini, R., Cox, J., Couture, A., Colonna, N., Chiaveri, E., Cortés Rossell, Guillem Pere, Cennini, P., Chepel, V., Capote, R., Carrillo de Albornoz, A., Calviño Tavares, Francisco, Cano-Ott, D., Rullhusen, P., Rudolf, G., Pretel Sánchez, Carme, Quesada, J., Plukis, A., Poch Parés, Agustí, Rosetti, M., Rubbia, C., Universitat Politècnica de Catalunya. Departament de Física i Enginyeria Nuclear, Universitat Politècnica de Catalunya. GREENER - Grup de recerca d'estudis energètics i de les radiacions, Tagliente, G., Taín Enríquez, José Luis, Ketlerov, V., Tassan-Got, L., Tavora, L., Konovalov, V., Salgado, J., Koehler, P., Sarchiapone, L., Krticka, M., Savvidis, I., Rauscher, T., Reifarth, R., Plompen, A., Perrot, L., Pavlopoulos, P., Papadopoulos, C., Paradela, C., Patronis, N., Pavlik, A., O'Brien, S., Baumann, P., Pancin, J., Papachristodoulou, C., Neves, F., Moreau, C., Oshima, M., Oberhummer, H., Berthoumieux, E., Becvar, F., Mastinu, P.F., Milazzo, P.M., Badurek, G., Marques, L., Audouin, L., Marrone, S., Assimakopoulos, P., Lukic, S., Andrzejewski, J., Marganiec, J., Kossionides, E., Andriamonje, S., Álvarez-Velarde, F., Álvarez-Pol, H., Bisterzo, S., Lozano, M, Lopes, I., Lindote, A., Leeb, H., Lamboudis, C., Stephan, C., Vannini, G., Vaz, P., Abbondanno, U., Isaev, S., Mosconi, M., Jericha, E., Heil, M., Kadi, Y., Kappeler, F., Karamanis, D., Mengoni, A., Karadimos, D., Plag, R., Kerveno, M., Fujii, K., Aerts, G., Terlizzi, R., Wendler, H., Wiescher, M., Voss, F., Walter, S., Igashira, M., Vlachoudis, V., Herrera-Martinez, A., Vlastou, R., Haight, R., Villamarin, D., Haas, B., Vincente, M.C., Wisshak, K., Goverdovski, A., Ventura, A., Gramegna, F., Goncalves, I., Gonzalez-Romero, E., Gunsing, F., Griesmayer, E., Guerrero, C., Embid-Segura, M., Ferrari, A., Ferrant, L., Domingo-Pardo, C., Dridi, W., Duran, I., Eleftheriadis, C., Dahlfors, M., David, S., Dillmann, I., Dolfini, R., Cox, J., Couture, A., Colonna, N., Chiaveri, E., Cortés Rossell, Guillem Pere, Cennini, P., Chepel, V., Capote, R., Carrillo de Albornoz, A., Calviño Tavares, Francisco, Cano-Ott, D., Rullhusen, P., Rudolf, G., Pretel Sánchez, Carme, Quesada, J., Plukis, A., Poch Parés, Agustí, Rosetti, M., and Rubbia, C.

Abstract

The -decay of 187Re (t1/2 = 42.3 Gyr) represents a suited cosmo-chronometer for the age of the r-process abundances, since the radiogenic part of the daughter isotope 187Os is defined by the difference between the solar 187Os abundance and s-process contribution to 187Os. The latter component can be determined via the s-process systematics based on the stellar neutron capture cross sections of 186Os and 187Os. The laboratory cross section of 187Os requires a significant correction for the effect of the low-lying excited state at 9.75 keV, which is strongly populated under stellar conditions. This theoretical correction can be improved by an experimental cross section for inelastic scattering to the 9.75 keV state. High resolution time-of-flight measurements of (n, ) cross sections of 186,187,188Os from 1 eV to 1 MeV at CERN n TOF facility are reported. The inferred stellar cross sections differ from previously recommended values. In addition, the inelastic scattering cross section has been measured at 30 keV neutron energy via time-of-flight at the Karlsruhe 3.7 MV Van de Graaff. The implications of these results for the Re/Os clock are discussed., Peer Reviewed, Postprint (published version)

Published
2007

32. Present status and future programs of the n_TOF experiment

Author

Chiaveri, E., primary, Calviani, M., additional, Vlachoudis, V., additional, Weis, C., additional, Andriamonje, S., additional, Andrzejewski, J., additional, Audouin, L., additional, Avrigeanu, F., additional, Barbagallo, M., additional, Bécares, V., additional, Beĉvář, F., additional, Belloni, F., additional, Berthoumieux, E., additional, Billowes, J., additional, Boccone, V., additional, Brugger, M., additional, Calviño, F., additional, Cano-Ott, D., additional, Carrapiço, C., additional, Cerutti, F., additional, Chin, M., additional, Colonna, N., additional, Cortés, G., additional, Cortés-Giraldo, M.A., additional, Diakaki, M., additional, Dillmann, I., additional, Domingo-Pardo, C., additional, Duran, I., additional, Dzysiuk, N., additional, Eleftheriadis, C., additional, Fernández-Ordóñez, M., additional, Ferrari, A., additional, Fraval, K., additional, Ganesan, S., additional, Giubrone, G., additional, Gómez-Hornillos, M.B., additional, Gonçalves, I.F., additional, González-Romero, E., additional, Gramegna, F., additional, Griesmayer, E., additional, Guerrero, C., additional, Gunsing, F., additional, Heil, M., additional, Jenkins, D.G., additional, Jericha, E., additional, Kadi, Y., additional, Käppeler, F., additional, Karadimos, D., additional, Kokkoris, M., additional, Krtička, M., additional, Kroll, J., additional, Lederer, C., additional, Leeb, H., additional, Leong, L.S., additional, Losito, R., additional, Lozano, M., additional, Manousos, A., additional, Marganiec, J., additional, Martinez, T., additional, Massimi, C., additional, Mastinu, P.F., additional, Mastromarco, M., additional, Meaze, M., additional, Mendoza, E., additional, Mengoni, A., additional, Milazzo, P.M., additional, Mirea, M., additional, Paradela, C., additional, Pavlik, A., additional, Perkowski, J., additional, Praena, J., additional, Quesada, J.M., additional, Rauscher, T., additional, Reifarth, R., additional, Riego, A., additional, Roman, F., additional, Rubbia, C., additional, Sarmento, R., additional, Tagliente, G., additional, Tain, J.L., additional, Tarrio, D., additional, Tassan-Got, L., additional, Tsinganis, A., additional, Valenta, S., additional, Vannini, G., additional, Variale, V., additional, Vaz, P., additional, Ventura, A., additional, Vermeulen, M.J., additional, Versaci, R., additional, Vlastou, R., additional, Wallner, A., additional, Ware, T., additional, and Wright, T.J., additional

Published
2012
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33. The reaction entrance channel and isotopic composition of fragments in a dynamical and statistical multifragmentation regime

Author

Milazzo, P. M., primary, Margagliotti, G. V., additional, Rui, R., additional, Sisto, M., additional, Vannini, G., additional, Bruno, M., additional, D'Agostino, M., additional, Agodi, C., additional, Alba, R., additional, Bellia, G., additional, Coniglione, R., additional, Del Zoppo, A., additional, Finocchiaro, P., additional, Maiolino, C., additional, Migneco, E., additional, Piattelli, P., additional, Santonocito, D., additional, Sapienza, P., additional, Colonna, N., additional, Gramegna, F., additional, Mastinu, P.F., additional, Iori, I., additional, and Moroni, A., additional

Published
2004
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34. Measurement of the $^{154}$Gd(n,γ) cross section and its astrophysical implications

Author

Mazzone, A., Cristallo, S., Aberle, O., Alaerts, G., Alcayne, V., Amaducci, S., Andrzejewski, J., Audouin, L., Babiano-Suarez, V., Bacak, M., Barbagallo, M., Bécares, V., Bečvář, F., Bellia, G., Berthoumieux, E., Billowes, J., Bosnar, D., Brown, A.S., Busso, M., Caamaño, M., Caballero, L., Calviani, M., Calviño, F., Cano-Ott, D., Casanovas, A., Castelluccio, D.M., Cerutti, F., Chen, Y.H., Chiaveri, E., Clai, G., Colonna, N., Cortés, G.P., Cortés-Giraldo, M.A., Cosentino, L., Damone, L.A., Diakaki, M., Dietz, M., Domingo-Pardo, C., Dressler, R., Dupont, E., Durán, I., Eleme, Z., Fernández-Domíngez, B., Ferrari, A., Ferro-Gonçalves, I., Finocchiaro, P., Furman, V., Garg, R., Gawlik, A., Gilardoni, S., Glodariu, T., Göbel, K., González-Romero, E., Guerrero, C., Gunsing, F., Heinitz, S., Heyse, J., Jenkins, D.G., Jericha, E., Kadi, Y., Käppeler, F., Kimura, A., Kivel, N., Kokkoris, M., Kopatch, Y., Kopecky, S., Krtička, M., Kurtulgil, D., Ladarescu, I., Lederer-Woods, C., Lerendegui-Marco, J., Lo Meo, S., Lonsdale, S.-J., Macina, D., Manna, A., Martínez, T., Masi, A., Massimi, C., Mastinu, P.F., Mastromarco, M., Matteucci, F., Maugeri, E., Mendoza, E., Mengoni, A., Michalopoulou, V., Milazzo, P.M., Mingrone, F., Mucciola, R., Musumarra, A., Negret, A., Nolte, R., Ogállar, F., Oprea, A., Patronis, N., Pavlik, A., Perkowski, J., Piersanti, L., Porras, I., Praena, J., Quesada, J.M., Radeck, D., Ramos Doval, D., Reifarth, R., Rochman, D., Rubbia, C., Sabaté-Gilarte, M., Saxena, A., Schillebeeckx, P., Schumann, D., Smith, A.G., Sosnin, N., Stamatopoulos, A., Tagliente, G., Tain, J.L., Talip, Z., Tarifeño-Saldivia, A.E., Tassan-Got, L., Torres-Sánchez, P., Tsinganis, A., Ulrich, J., Urlass, S., Valenta, S., Vannini, G., Variale, V., Vaz, P., Ventura, A., Vescovi, D., Vlachoudis, V., Vlastou, R., Wallner, A., Woods, P.J., Wynants, R., Wright, T.J., and Žugec, P.

Subjects
Neutron time of flight, n_TOF, 7. Clean energy, s process, 154Gd
Abstract

The neutron capture cross section of 154Gd was measured from 1 eV to 300 keV in the experimental area located 185 m from the CERN n_TOF neutron spallation source, using a metallic sample of gadolinium, enriched to 67% in 154Gd. The capture measurement, performed with four C6D6 scintillation detectors, has been complemented by a transmission measurement performed at the GELINA time-of-flight facility (JRC-Geel), thus minimising the uncertainty related to sample composition. An accurate Maxwellian averaged capture cross section (MACS) was deduced over the temperature range of interest for s process nucleosynthesis modelling. We report a value of 880(50) mb for the MACS at kT=30 keV, significantly lower compared to values available in literature. The new adopted 154Gd(n,γ) cross section reduces the discrepancy between observed and calculated solar s-only isotopic abundances predicted by s-process nucleosynthesis models.

35. Measurement of the 154Gd(n,γ) cross section and its astrophysical implications

Author

Z. Talip, A. S. Brown, J. Lerendegui-Marco, S. Amaducci, Alexandru Negret, P. Vaz, F. Käppeler, A. Masi, R. Wynants, Alberto Ventura, D. G. Jenkins, M. Sabaté-Gilarte, E. Mendoza, A. Kimura, G. Vannini, O. Aberle, V. Babiano-Suarez, Stefan Kopecky, A. Manna, A. Pavlik, A. Stamatopoulos, M. Diakaki, M. Mastromarco, C. Domingo-Pardo, V. Variale, Dimitri Rochman, S. Heinitz, M. A. Cortés-Giraldo, Z. Eleme, Emilio Andrea Maugeri, M. Kokkoris, Anton Wallner, D. Macina, B. Fernández-Domíngez, E. Jericha, S. Urlass, Mario Barbagallo, Alfredo Ferrari, Paolo Finocchiaro, Maurizio Busso, G. Alaerts, A. Oprea, J. Heyse, D. M. Castelluccio, R. Mucciola, F. Calviño, D. Schumann, Ariel Tarifeño-Saldivia, S. J. Lonsdale, A. Musumarra, G. Cortes, E. Chiaveri, D. Cano-Ott, I. Ferro-Gonçalves, P. M. Milazzo, Ignacio Porras, Rene Reifarth, Giulia Clai, S. Valenta, A. Gawlik, N. Patronis, P. Schillebeeckx, Javier Praena, S. Lo Meo, Carlos Guerrero, J. Perkowski, P. Torres-Sánchez, F. Bečvář, A. Saxena, Marco Calviani, Alberto Mengoni, I. Ladarescu, A. G. Smith, R. Garg, J. Billowes, J. M. Quesada, E. González-Romero, L. Tassan-Got, F. Gunsing, Francesca Matteucci, I. Duran, M. Dietz, Diego Vescovi, Sergio Cristallo, F. Mingrone, J. Andrzejewski, Cristian Massimi, Philip Woods, V. Bécares, L. Caballero, Claudia Lederer-Woods, R. Dressler, V. Vlachoudis, R. Vlastou, Ralf Nolte, M. Caamaño, Deniz Kurtulgil, L. A. Damone, Damir Bosnar, Y. Kadi, K. Göbel, F. Cerutti, V. Alcayne, T. Wright, V. Furman, Y. Kopatch, N. V. Sosnin, Simone Gilardoni, Annamaria Mazzone, Petar Žugec, J. Ulrich, D. Radeck, E. Berthoumieux, J. L. Tain, Niko Kivel, G. Bellia, F. Ogállar, Y. H. Chen, C. Rubbia, G. Tagliente, D. Ramos Doval, A. Casanovas, L. Cosentino, P. F. Mastinu, M. Krtička, T. Martinez, A. Tsinganis, Luciano Piersanti, Nicola Colonna, E. Dupont, M. Bacak, T. Glodariu, L. Audouin, V. Michalopoulou, ITA, GBR, FRA, DEU, ESP, AUT, BEL, HRV, JPN, GRC, IND, POL, CZE, CHE, Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, n_TOF, Universitat Politècnica de Catalunya. Departament de Física, Universitat Politècnica de Catalunya. Doctorat en Enginyeria Nuclear i de les Radiacions Ionitzants, Universitat Politècnica de Catalunya. Institut de Tècniques Energètiques, Universitat Politècnica de Catalunya. ANT - Advanced Nuclear Technologies Research Group, Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear, Mazzone, A., Cristallo, S., Aberle, O., Alaerts, G., Alcayne, V., Amaducci, S., Andrzejewski, J., Audouin, L., Babiano-Suarez, V., Bacak, M., Barbagallo, M., Becares, V., Becvar, F., Bellia, G., Berthoumieux, E., Billowes, J., Bosnar, D., Brown, A. S., Busso, M., Caamano, M., Caballero, L., Calviani, M., Calvino, F., Cano-Ott, D., Casanovas, A., Castelluccio, D. M., Cerutti, F., Chen, Y. H., Chiaveri, E., Clai, G., Colonna, N., Cortes, G. P., Cortes-Giraldo, M. A., Cosentino, L., Damone, L. A., Diakaki, M., Dietz, M., Domingo-Pardo, C., Dressler, R., Dupont, E., Duran, I., Eleme, Z., Fernandez-Domingez, B., Ferrari, A., Ferro-Goncalves, I., Finocchiaro, P., Furman, V., Garg, R., Gawlik, A., Gilardoni, S., Glodariu, T., Gobel, K., Gonzalez-Romero, E., Guerrero, C., Gunsing, F., Heinitz, S., Heyse, J., Jenkins, D. G., Jericha, E., Kadi, Y., Kappeler, F., Kimura, A., Kivel, N., Kokkoris, M., Kopatch, Y., Kopecky, S., Krticka, M., Kurtulgil, D., Ladarescu, I., Lederer-Woods, C., Lerendegui-Marco, J., Lo Meo, S., Lonsdale, S. -J., Macina, D., Manna, A., Martinez, T., Masi, A., Massimi, C., Mastinu, P. F., Mastromarco, M., Matteucci, F., Maugeri, E., Mendoza, E., Mengoni, A., Michalopoulou, V., Milazzo, P. M., Mingrone, F., Mucciola, R., Musumarra, A., Negret, A., Nolte, R., Ogallar, F., Oprea, A., Patronis, N., Pavlik, A., Perkowski, J., Piersanti, L., Porras, I., Praena, J., Quesada, J. M., Radeck, D., Ramos Doval, D., Reifarth, R., Rochman, D., Rubbia, C., Sabate-Gilarte, M., Saxena, A., Schillebeeckx, P., Schumann, D., Smith, A. G., Sosnin, N., Stamatopoulos, A., Tagliente, G., Tain, J. L., Talip, Z., Tarifeno-Saldivia, A. E., Tassan-Got, L., Torres-Sanchez, P., Tsinganis, A., Ulrich, J., Urlass, S., Valenta, S., Vannini, G., Variale, V., Vaz, P., Ventura, A., Vescovi, D., Vlachoudis, V., Vlastou, R., Wallner, A., Woods, P. J., Wynants, R., Wright, T. J., Zugec, P., Mazzone A., Cristallo S., Aberle O., Alaerts G., Alcayne V., Amaducci S., Andrzejewski J., Audouin L., Babiano-Suarez V., Bacak M., Barbagallo M., Becares V., Becvar F., Bellia G., Berthoumieux E., Billowes J., Bosnar D., Brown A.S., Busso M., Caamano M., Caballero L., Calviani M., Calvino F., Cano-Ott D., Casanovas A., Castelluccio D.M., Cerutti F., Chen Y.H., Chiaveri E., Clai G., Colonna N., Cortes G.P., Cortes-Giraldo M.A., Cosentino L., Damone L.A., Diakaki M., Dietz M., Domingo-Pardo C., Dressler R., Dupont E., Duran I., Eleme Z., Fernandez-Domingez B., Ferrari A., Ferro-Goncalves I., Finocchiaro P., Furman V., Garg R., Gawlik A., Gilardoni S., Glodariu T., Gobel K., Gonzalez-Romero E., Guerrero C., Gunsing F., Heinitz S., Heyse J., Jenkins D.G., Jericha E., Kadi Y., Kappeler F., Kimura A., Kivel N., Kokkoris M., Kopatch Y., Kopecky S., Krticka M., Kurtulgil D., Ladarescu I., Lederer-Woods C., Lerendegui-Marco J., Lo Meo S., Lonsdale S.-J., Macina D., Manna A., Martinez T., Masi A., Massimi C., Mastinu P.F., Mastromarco M., Matteucci F., Maugeri E., Mendoza E., Mengoni A., Michalopoulou V., Milazzo P.M., Mingrone F., Mucciola R., Musumarra A., Negret A., Nolte R., Ogallar F., Oprea A., Patronis N., Pavlik A., Perkowski J., Piersanti L., Porras I., Praena J., Quesada J.M., Radeck D., Ramos Doval D., Reifarth R., Rochman D., Rubbia C., Sabate-Gilarte M., Saxena A., Schillebeeckx P., Schumann D., Smith A.G., Sosnin N., Stamatopoulos A., Tagliente G., Tain J.L., Talip Z., Tarifeno-Saldivia A.E., Tassan-Got L., Torres-Sanchez P., Tsinganis A., Ulrich J., Urlass S., Valenta S., Vannini G., Variale V., Vaz P., Ventura A., Vescovi D., Vlachoudis V., Vlastou R., Wallner A., Woods P.J., Wynants R., Wright T.J., and Zugec P.

Subjects
Nuclear and High Energy Physics, Gd, Neutron time of flight, Física::Física de partícules [Àrees temàtiques de la UPC], Nuclear physics, Neutrons--Captura, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], nucl-ex, Neutron time of flightn, 01 natural sciences, 7. Clean energy, Neutrons--Capture, Cross section (physics), Nucleosynthesis, ComputingMethodologies_SYMBOLICANDALGEBRAICMANIPULATION, 0103 physical sciences, Neutron cross section, ddc:530, Nuclear Physics - Experiment, Spallation, Neutron, n_TOF, Nuclear Experiment, 010306 general physics, 154Gd, Physics, Scintillation, 154 Gd, Física [Àrees temàtiques de la UPC], 010308 nuclear & particles physics, s process, Atmospheric temperature range, lcsh:QC1-999, NATURAL SCIENCES. Physics, PRIRODNE ZNANOSTI. Fizika, Neutron time-of-flight, Física nuclear, s-process, lcsh:Physics
Abstract

The isotope used in this research was supplied by the United States Department of Energy Office of Science by the Isotope Program in the Office of Nuclear Physics., The neutron capture cross section of 154Gd was measured from 1 eV to 300 keV in the experimental area located 185 m from the CERN n_TOF neutron spallation source, using a metallic sample of gadolinium, enriched to 67% in 154Gd. The capture measurement, performed with four C6D6 scintillation detectors, has been complemented by a transmission measurement performed at the GELINA time-of-flight facility (JRC-Geel), thus minimising the uncertainty related to sample composition. An accurate Maxwellian averaged capture cross section (MACS) was deduced over the temperature range of interest for s process nucleosynthesis modelling. We report a value of 880(50) mb for the MACS at kT = 30 keV, significantly lower compared to values available in literature. The new adopted 154Gd(n,γ ) cross section reduces the discrepancy between observed and calculated solar s-only isotopic abundances predicted by s-process nucleosynthesis models., EUFRAT open access programme of the Joint Research Centre at Geel

Published
2020

36. $^{80}$Se(n,$\gamma$) cross-section measurement at CERN n_TOF

Author

I. Knapova, P. Vaz, F. Mingrone, E. Jericha, J. Andrzejewski, Luis Caballero, Paolo Finocchiaro, A. Gawlik, F. Ogállar, V. Vlachoudis, G. Tagliente, D. Ramos Doval, G. Vannini, F. Gunsing, Javier Praena, J. L. Tain, Cristian Massimi, F. Calviño, J. Perkowski, Alberto Ventura, M. Sabaté-Gilarte, Z. Eleme, A. Casanovas, Emilio Andrea Maugeri, E. Mendoza, V. Variale, Dimitri Rochman, Arnd R. Junghans, Rene Reifarth, M. Kokkoris, Y. Kopatch, Carlos Guerrero, L. Cosentino, S. Heinitz, A. Tsinganis, J. Lerendegui-Marco, S. Amaducci, R. Garg, J. M. Quesada, L. Tassan-Got, P. J. Davies, A. Kimura, Diego Vescovi, C. Petrone, Luciano Piersanti, Sergio Cristallo, E. González-Romero, Alfredo Ferrari, Nicola Colonna, E. Chiaveri, G. Cortes, M. A. Cortés-Giraldo, D. Cano-Ott, M. Caamaño, O. Aberle, I. Ferro-Gonçalves, P. J. Woods, E. Dupont, J. Balibrea-Correa, D. Macina, S. Valenta, F. Cerutti, A. Sekhar, M. Diakaki, P. M. Milazzo, Pierfrancesco Mastinu, A. S. Brown, A. Pavlik, N. Patronis, C. Domingo-Pardo, M. Bacak, A. Musumarra, M. A. Millán-Callado, Marco Calviani, P. Schillebeeckx, Mario Barbagallo, B. Fernández-Domíngez, A. G. Smith, D. Schumann, Ignacio Porras, C. Rubbia, Simone Gilardoni, S. Urlass, P. Torres-Sánchez, Alberto Mengoni, I. Ladarescu, A. Oprea, J. Heyse, M. Dietz, M. Mastromarco, U. Jiri, Q. Ducasse, A. Saxena, V. Michalopoulou, K. Göbel, Anton Wallner, S. Bennett, A. Masi, A. Stamatopoulos, T. Wright, J. Moreno-Soto, D. G. Jenkins, I. Duran, Maurizio Busso, R. Vlastou, R. Dressler, Damir Bosnar, Y. Kadi, Ariel Tarifeño-Saldivia, S. J. Lonsdale, L. A. Damone, M. Krtička, T. Martinez, E. Berthoumieux, N. V. Sosnin, Annamaria Mazzone, Petar Žugec, P. Sprung, Alexandru Negret, F. Käppeler, E. Pirovano, V. Babiano-Suarez, A. Manna, V. Furman, B. Thomas, V. Alcayne, L. Audouin, Claudia Lederer-Woods, Deniz Kurtulgil, Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear, European Research Council (ERC) 681740, Babiano-Suarez V., Aberle O., Alcayne V., Amaducci S., Andrzejewski J., Audouin L., Bacak M., Balibrea-Correa J., Barbagallo M., Bennett S., Berthoumieux E., Bosnar D., Brown A.S., Busso M., Caamao M., Caballero L., Calviani M., Calvio F., Cano-Ott D., Casanovas A., Cerutti F., Chiaveri E., Colonna N., Cortes G.P., Cortes-Giraldo M.A., Cosentino L., Cristallo S., Damone L.A., Davies P.J., Diakaki M., Dietz M., Domingo-Pardo C., Dressler R., Ducasse Q., Dupont E., Durn I., Eleme Z., Fernndez-Domingez B., Ferrari A., Ferro-Goncalves I., Finocchiaro P., Furman V., Garg R., Gawlik A., Gilardoni S., Gobel K., Gonzlez-Romero E., Guerrero C., Gunsing F., Heinitz S., Heyse J., Jenkins D.G., Jericha E., Jiri U., Junghans A., Kadi Y., Kappeler F., Kimura A., Knapov I., Kokkoris M., Kopatch Y., Krticka M., Kurtulgil D., Ladarescu I., Lederer-Woods C., Lerendegui-Marco J., Lonsdale S.-J., Macina D., Manna A., Martinez T., Masi A., Massimi C., Mastinu P.F., Mastromarco M., Maugeri E., Mazzone A., Mendoza E., Mengoni A., Michalopoulou V., Milazzo P.M., Milln-Callado M.A., Mingrone F., Moreno-Soto J., Musumarra A., Negret A., Ogllar F., Oprea A., Patronis N., Pavlik A., Perkowski J., Petrone C., Piersanti L., Pirovano E., Porras I., Praena J., Quesada J.M., Ramos Doval D., Reifarth R., Rochman D., Rubbia C., Sabate-Gilarte M., Saxena A., Schillebeeckx P., Schumann D., Sekhar A., Smith A.G., Sosnin N., Sprung P., Stamatopoulos A., Tagliente G., Tain J.L., Tarifeo-Saldivia A.E., Tassan-Got L., Thomas B., Torres-Snchez P., Tsinganis A., Urlass S., Valenta S., Vannini G., Variale V., Vaz P., Ventura A., Vescovi D., Vlachoudis V., Vlastou R., Wallner A., Woods P.J., Wright T.J., Zugec P., Babiano-Suarez, V., Aberle, O., Alcayne, V., Amaducci, S., Andrzejewski, J., Audouin, L., Bacak, M., Balibrea-Correa, J., Barbagallo, M., Bennett, S., Berthoumieux, E., Bosnar, D., Brown, A. S., Busso, M., Caamao, M., Caballero, L., Calviani, M., Calvio, F., Cano-Ott, D., Casanovas, A., Cerutti, F., Chiaveri, E., Colonna, N., Cortes, G. P., Cortes-Giraldo, M. A., Cosentino, L., Cristallo, S., Damone, L. A., Davies, P. J., Diakaki, M., Dietz, M., Domingo-Pardo, C., Dressler, R., Ducasse, Q., Dupont, E., Durn, I., Eleme, Z., Fernndez-Domingez, B., Ferrari, A., Ferro-Goncalves, I., Finocchiaro, P., Furman, V., Garg, R., Gawlik, A., Gilardoni, S., Gobel, K., Gonzlez-Romero, E., Guerrero, C., Gunsing, F., Heinitz, S., Heyse, J., Jenkins, D. G., Jericha, E., Jiri, U., Junghans, A., Kadi, Y., Kappeler, F., Kimura, A., Knapov, I., Kokkoris, M., Kopatch, Y., Krticka, M., Kurtulgil, D., Ladarescu, I., Lederer-Woods, C., Lerendegui-Marco, J., Lonsdale, S. -J., Macina, D., Manna, A., Martinez, T., Masi, A., Massimi, C., Mastinu, P. F., Mastromarco, M., Maugeri, E., Mazzone, A., Mendoza, E., Mengoni, A., Michalopoulou, V., Milazzo, P. M., Milln-Callado, M. A., Mingrone, F., Moreno-Soto, J., Musumarra, A., Negret, A., Ogllar, F., Oprea, A., Patronis, N., Pavlik, A., Perkowski, J., Petrone, C., Piersanti, L., Pirovano, E., Porras, I., Praena, J., Quesada, J. M., Ramos Doval, D., Reifarth, R., Rochman, D., Rubbia, C., Sabate-Gilarte, M., Saxena, A., Schillebeeckx, P., Schumann, D., Sekhar, A., Smith, A. G., Sosnin, N., Sprung, P., Stamatopoulos, A., Tagliente, G., Tain, J. L., Tarifeo-Saldivia, A. E., Tassan-Got, L., Thomas, B., Torres-Snchez, P., Tsinganis, A., Urlass, S., Valenta, S., Vannini, G., Variale, V., Vaz, P., Ventura, A., Vescovi, D., Vlachoudis, V., Vlastou, R., Wallner, A., Woods, P. J., Wright, T. J., and Zugec, P.

Subjects
Physics, History, Large Hadron Collider, Isotope, General Physics and Astronomy, 80Se, neutron capture, neutron time of flight, n_TOF, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, Computer Science Applications, Education, Nuclear physics, s process, neutron physics, Time of flight, Nucleosynthesis, 0103 physical sciences, Neutron cross section, Radiative transfer, Nuclear Physics - Experiment, Slow neutron, 010306 general physics, s-process, 010303 astronomy & astrophysics
Abstract

Radiative neutron capture cross section measurements are of fundamental importance for the study of the slow neutron capture (s-) process of nucleosynthesis. This mechanism is responsible for the formation of most elements heavier than iron in the Universe. Particularly relevant are branching nuclei along the s-process path, which are sensitive to the physical conditions of the stellar environment. One such example is the branching at 79Se (3.27 × 105 y), which shows a thermally dependent β-decay rate. However, an astrophysically consistent interpretation requires also the knowledge of the closest neighbour isotopes involved. In particular, the 80Se(n,γ) cross section directly affects the stellar yield of the “cold” branch leading to the formation of the s-only 82Kr. Experimentally, there exists only one previous measurement on 80Se using the time of flight (TOF) technique. However, the latter suffers from some limitations that are described in this presentation. These drawbacks have been significantly improved in a recent measurement at CERN n TOF. This contribution presents a summary of the latter measurement and the status of the data analysis.

Published
2019

37. Neutron capture measurement at the n TOF facility of the 204Tl and 205Tl s-process branching points

Author

Luis Caballero, V. Michalopoulou, S. Urlass, Maurizio Busso, I. Duran, A. Masi, E. Mendoza, D. Macina, Carlos Guerrero, R. Garg, A. S. Brown, A. Musumarra, Claudia Lederer-Woods, D. G. Jenkins, G. Cortes, Peter Schillebeeckx, Ariel Tarifeño-Saldivia, S. J. Lonsdale, Emilio Andrea Maugeri, U Koester, Deniz Kurtulgil, E. Dupont, I. Ferro-Gonçalves, M. Kokkoris, A. Pavlik, C. Domingo-Pardo, Ignacio Porras, L. Cosentino, A. Kimura, B. Fernández-Domíngez, P. M. Milazzo, M. Mastromarco, F. Mingrone, M. A. Cortés-Giraldo, D. Bosnar, Y. Kopatch, P. J. Woods, G. Vannini, S. Bennett, J Balibrea, J. Lerendegui-Marco, J. Andrzejewski, Massimo Barbagallo, S. Amaducci, A. Stamatopoulos, F. Ogállar, N. Patronis, A. K. Saxena, A. Oprea, M. Caamaño, E. Jericha, I. Knapova, Paolo Finocchiaro, Anton Wallner, Z. Eleme, Arnaud Ferrari, G. Tagliente, V. Vlachoudis, D. Ramos Doval, B. Thomas, P. Vaz, Dorothea Schumann, Alberto Mengoni, I. Ladarescu, Alberto Ventura, L. A. Damone, P. J. Davies, O. Aberle, V. Variale, Dimitri Rochman, Arnd R. Junghans, M. A. Millán-Callado, A. Casanovas, V. Alcayne, Rene Reifarth, A. Gawlik, S. Heinitz, C. Petrone, F. Gunsing, Diego Vescovi, J. M. Quesada, L. Tassan-Got, Cristian Massimi, Y. Kadi, E. González-Romero, Sergio Cristallo, S. Valenta, Marco Calviani, A. G. Smith, P. Torres-Sánchez, M. Dietz, M. Sabaté-Gilarte, J. Moreno-Soto, D. Cano-Ott, A. Sekhar, M. Diakaki, M. Krtička, T. Martinez, E. Chiaveri, P. F. Mastinu, Kathrin Göbel, Jan Heyse, L. Audouin, M. Bacak, Rugard Dressler, A. Tsinganis, Luciano Piersanti, Nicola Colonna, N. V. Sosnin, Annamaria Mazzone, Petar Žugec, P. Sprung, E. Pirovano, R. Vlastou, E. Berthoumieux, V. Furman, T. J. Wright, Simone Gilardoni, U. Jiri, F. Cerutti, F. Calviño, J. Perkowski, Javier Praena, Alexandru Negret, F. Käppeler, V. Babiano-Suarez, A. Manna, J. L. Tain, C. Rubbia, Q. Ducasse, Casanovas, A., Tarifeo-Saldivia, A. E., Domingo-Pardo, C., Calvio, F., Maugeri, E., Guerrero, C., Lerendegui-Marco, J., Dressler, R., Heinitz, S., Schumann, D., Tain, J. L., Quesada, J. M., Aberle, O., Alcayne, V., Amaducci, S., Andrzejewski, J., Audouin, L., Babiano-Suarez, V., Bacak, M., Balibrea, J., Barbagallo, M., Bennett, S., Berthoumieux, E., Bosnar, D., Brown, A. S., Busso, M., Caamao, M., Caballero, L., Calviani, M., Cano-Ott, D., Cerutti, F., Chiaveri, E., Colonna, N., Cortes, G. P., Cortes-Giraldo, M. A., Cosentino, L., Cristallo, S., Damone, L. A., Davies, P. J., Diakaki, M., Dietz, M., Ducasse, Q., Dupont, E., Durn, I., Eleme, Z., Fernndez-Domingez, B., Ferrari, A., Ferro-Goncalves, I., Finocchiaro, P., Furman, V., Garg, R., Gawlik, A., Gilardoni, S., Gobel, K., Gonzlez-Romero, E., Gunsing, F., Heyse, J., Jenkins, D. G., Jericha, E., Jiri, U., Junghans, A., Kadi, Y., Kappeler, F., Kimura, A., Knapov, I., Kokkoris, M., Kopatch, Y., Krticka, M., Kurtulgil, D., Ladarescu, I., Lederer-Woods, C., Lonsdale, S. -J., Macina, D., Manna, A., Martinez, T., Masi, A., Massimi, C., Mastinu, P. F., Mastromarco, M., Mazzone, A., Mendoza, E., Mengoni, A., Michalopoulou, V., Milazzo, P. M., Milln-Callado, M. A., Mingrone, F., Moreno-Soto, J., Musumarra, A., Negret, A., Ogllar, F., Oprea, A., Patronis, N., Pavlik, A., Perkowski, J., Petrone, C., Piersanti, L., Pirovano, E., Porras, I., Praena, J., Ramos Doval, D., Reifarth, R., Rochman, D., Rubbia, C., Sabate-Gilarte, M., Saxena, A., Schillebeeckx, P., Sekhar, A., Smith, A. G., Sosnin, N., Sprung, P., Stamatopoulos, A., Tagliente, G., Tassan-Got, L., Thomas, B., Torres-Snchez, P., Tsinganis, A., Urlass, S., Valenta, S., Vannini, G., Variale, V., Vaz, P., Ventura, A., Vescovi, D., Vlachoudis, V., Vlastou, R., Wallner, A., Woods, P. J., Wright, T. J., Zugec, P., Koester, U., Institut de Physique Nucléaire d'Orsay (IPNO), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Institut Laue-Langevin (ILL), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), ILL, Casanovas A., Tarifeo-Saldivia A.E., Domingo-Pardo C., Calvio F., Maugeri E., Guerrero C., Lerendegui-Marco J., Dressler R., Heinitz S., Schumann D., Tain J.L., Quesada J.M., Aberle O., Alcayne V., Amaducci S., Andrzejewski J., Audouin L., Babiano-Suarez V., Bacak M., Balibrea J., Barbagallo M., Bennett S., Berthoumieux E., Bosnar D., Brown A.S., Busso M., Caamao M., Caballero L., Calviani M., Cano-Ott D., Cerutti F., Chiaveri E., Colonna N., Cortes G.P., Cortes-Giraldo M.A., Cosentino L., Cristallo S., Damone L.A., Davies P.J., Diakaki M., Dietz M., Ducasse Q., Dupont E., Durn I., Eleme Z., Fernndez-Domingez B., Ferrari A., Ferro-Goncalves I., Finocchiaro P., Furman V., Garg R., Gawlik A., Gilardoni S., Gobel K., Gonzlez-Romero E., Gunsing F., Heyse J., Jenkins D.G., Jericha E., Jiri U., Junghans A., Kadi Y., Kappeler F., Kimura A., Knapov I., Kokkoris M., Kopatch Y., Krticka M., Kurtulgil D., Ladarescu I., Lederer-Woods C., Lonsdale S.-J., Macina D., Manna A., Martinez T., Masi A., Massimi C., Mastinu P.F., Mastromarco M., Mazzone A., Mendoza E., Mengoni A., Michalopoulou V., Milazzo P.M., Milln-Callado M.A., Mingrone F., Moreno-Soto J., Musumarra A., Negret A., Ogllar F., Oprea A., Patronis N., Pavlik A., Perkowski J., Petrone C., Piersanti L., Pirovano E., Porras I., Praena J., Ramos Doval D., Reifarth R., Rochman D., Rubbia C., Sabate-Gilarte M., Saxena A., Schillebeeckx P., Sekhar A., Smith A.G., Sosnin N., Sprung P., Stamatopoulos A., Tagliente G., Tassan-Got L., Thomas B., Torres-Snchez P., Tsinganis A., Urlass S., Valenta S., Vannini G., Variale V., Vaz P., Ventura A., Vescovi D., Vlachoudis V., Vlastou R., Wallner A., Woods P.J., Wright T.J., Zugec P., and Koester U.

Subjects
History, Electron density, Nuclear Theory, General Physics and Astronomy, Natural abundance, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 010502 geochemistry & geophysics, 01 natural sciences, Education, Nuclear physics, Nucleosynthesis, 0103 physical sciences, Astrophysics::Solar and Stellar Astrophysics, ddc:530, Nuclear Physics - Experiment, Nuclear Experiment, 010306 general physics, neutron physics, n_TOF, s process nucleosynthesis, 0105 earth and related environmental sciences, Physics, Isotope, Nuclear data, 204Tl, 205Tl, neutron capture, neutron time of flight, n_TOF, Computer Science Applications, Neutron capture, Isotopes of lead, s-process
Abstract

Neutron capture cross sections are one of the fundamental nuclear data in the study of the s (slow) process of nucleosynthesis. More interestingly, the competition between the capture and the decay rates in some unstable nuclei determines the local isotopic abundance pattern. Since decay rates are often sensible to temperature and electron density, the study of the nuclear properties of these nuclei can provide valuable constraints to the physical magnitudes of the nucleosynthesis stellar environment. Here we report on the capture cross section measurement of two thallium isotopes, 204Tl and 205Tl performed by the time-of-flight technique at the n TOF facility at CERN. At some particular stellar s-process environments, the decay of both nuclei is strongly enhanced, and determines decisively the abundance of two s-only isotopes of lead, 204Pb and 205Pb. The latter, as a long-lived radioactive nucleus, has potential use as a chronometer of the last s-process events that contributed to final solar isotopic abundances.

Published
2020

38. Characterization and First Test of an i-TED Prototype at CERN n_TOF

Author

Ralf Nolte, A. Kimura, L. A. Damone, Mario Barbagallo, Y. H. Chen, V. Bécares, D. Schumann, G. Cortes, I. Duran, R. Dressler, L. Cosentino, O. Aberle, A. Gawlik, K. Göbel, B. Fernández-Domíngez, Luis Caballero, Ignacio Porras, Rene Reifarth, M. A. Cortés-Giraldo, Simone Gilardoni, C. Rubbia, Alfredo Ferrari, A. Oprea, P. Schillebeeckx, E. Chiaveri, D. Cano-Ott, T. Wright, D. Macina, J. Heyse, J. M. Quesada, L. Tassan-Got, Emilio Andrea Maugeri, M. Krtička, G. Bellia, M. Mastromarco, M. Kokkoris, Sergio Cristallo, Paolo Finocchiaro, V. Furman, F. Ogállar, A. Pavlik, T. Martinez, Z. Talip, G. Tagliente, C. Domingo-Pardo, D. Ramos Doval, Alexandru Negret, G. Vannini, Anton Wallner, Javier Praena, S. Lo Meo, F. Bečvář, A. Saxena, F. Käppeler, A. S. Brown, A. Masi, V. Babiano-Suarez, E. Mendoza, I. Ferro-Gon calves, D. G. Jenkins, A. Casanovas, J. Ulrich, P. J. Woods, Maurizio Busso, P. F. Mastinu, S. Valenta, M. Sabaté-Gilarte, A. Manna, D. Radeck, N. Patronis, Francesca Matteucci, Marco Calviani, P. Vaz, E. Berthoumieux, M. Caamaño, A. G. Smith, S. Heinitz, Ariel Tarifeño-Saldivia, S. J. Lonsdale, M. Diakaki, Alberto Ventura, V. Variale, Dimitri Rochman, M. Dietz, F. Cerutti, Alberto Mengoni, J. Lerendegui-Marco, S. Amaducci, I. Ladarescu, J. Billowes, R. Vlastou, Damir Bosnar, N. V. Sosnin, Y. Kadi, J. L. Tain, A. Stamatopoulos, Annamaria Mazzone, Petar Žugec, Niko Kivel, Z. Eleme, Carlos Guerrero, E. González-Romero, L. Audouin, V. Michalopoulou, V. Alcayne, S. Urlass, A. Musumarra, Claudia Lederer-Woods, Deniz Kurtulgil, A. Tsinganis, Luciano Piersanti, Nicola Colonna, E. Dupont, M. Bacak, T. Glodariu, Y. Kopatch, T. Rausher, F. Gunsing, Cristian Massimi, F. Mingrone, J. Andrzejewski, V. Vlachoudis, F. Calviño, P. M. Milazzo, J. Perkowski, Institut de Physique Nucléaire d'Orsay (IPNO), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, García-Ramos JE., Andrés M., Valera J., Moro A., Pérez-Bernal F., Babiano-Suarez V., Caballero L., Domingo-Pardo C., Ladarescu I., Aberle O., Alcayne V., Amaducci S., Andrzejewski J., Audouin L., Bacak M., Barbagallo M., Becares V., Becvar F., Bellia G., Berthoumieux E., Billowes J., Bosnar D., Brown A.S., Busso M., Caamano M., Calviani M., Calvino F., Cano-Ott D., Casanovas A., Cerutti F., Chen Y.H., Chiaveri E., Colonna N., Cortes G.P., Cortes-Giraldo M.A., Cosentino L., Cristallo S., Damone L.A., Diakaki M., Dietz M., Dressler R., Dupont E., Duran I., Eleme Z., Fernandez-Domingez B., Ferrari A., Ferro-Gon calves I., Finocchiaro P., Furman V., Gawlik A., Gilardoni S., Glodariu T., Gobel K., Gonzalez-Romero E., Guerrero C., Gunsing F., Heinitz S., Heyse J., Jenkins D.G., Kadi Y., Kappeler F., Kimura A., Kivel N., Kokkoris M., Kopatch Y., Krticka M., Kurtulgil D., Lederer-Woods C., Lerendegui-Marco J., Lo Meo S., Lonsdale S.-J., Macina D., Manna A., Martinez T., Masi A., Massimi C., Mastinu P.F., Mastromarco M., Matteucci F., Maugeri E., Mazzone A., Mendoza E., Mengoni A., Michalopoulou V., Milazzo P.M., Mingrone F., Musumarra A., Negret A., Nolte R., Ogallar F., Oprea A., Patronis N., Pavlik A., Perkowski J., Piersanti L., Porras I., Praena J., Quesada J.M., Radeck D., Ramos Doval D., Rausher T., Reifarth R., Rochman D., Rubbia C., Sabate-Gilarte M., Saxena A., Schillebeeckx P., Schumann D., Smith A.G., Sosnin N., Stamatopoulos A., Tagliente G., Tain J.L., Talip Z., Tarifeno-Saldivia A.E., Tassan-Got L., Tsinganis A., Ulrich J., Urlass S., Valenta S., Vannini G., Variale V., Vaz P., Ventura A., Vlachoudis V., Vlastou R., Wallner A., Woods P.J., Wright T.J., Zugec P., Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Babiano-Suarez, V., Caballero, L., Domingo-Pardo, C., Ladarescu, I., Aberle, O., Alcayne, V., Amaducci, S., Andrzejewski, J., Audouin, L., Bacak, M., Barbagallo, M., Becares, V., Becvar, F., Bellia, G., Berthoumieux, E., Billowes, J., Bosnar, D., Brown, A. S., Busso, M., Caamano, M., Calviani, M., Calvino, F., Cano-Ott, D., Casanovas, A., Cerutti, F., Chen, Y. H., Chiaveri, E., Colonna, N., Cortes, G. P., Cortes-Giraldo, M. A., Cosentino, L., Cristallo, S., Damone, L. A., Diakaki, M., Dietz, M., Dressler, R., Dupont, E., Duran, I., Eleme, Z., Fernandez-Domingez, B., Ferrari, A., Ferro-Gon calves, I., Finocchiaro, P., Furman, V., Gawlik, A., Gilardoni, S., Glodariu, T., Gobel, K., Gonzalez-Romero, E., Guerrero, C., Gunsing, F., Heinitz, S., Heyse, J., Jenkins, D. G., Kadi, Y., Kappeler, F., Kimura, A., Kivel, N., Kokkoris, M., Kopatch, Y., Krticka, M., Kurtulgil, D., Lederer-Woods, C., Lerendegui-Marco, J., Lo Meo, S., Lonsdale, S. -J., Macina, D., Manna, A., Martinez, T., Masi, A., Massimi, C., Mastinu, P. F., Mastromarco, M., Matteucci, F., Maugeri, E., Mazzone, A., Mendoza, E., Mengoni, A., Michalopoulou, V., Milazzo, P. M., Mingrone, F., Musumarra, A., Negret, A., Nolte, R., Ogallar, F., Oprea, A., Patronis, N., Pavlik, A., Perkowski, J., Piersanti, L., Porras, I., Praena, J., Quesada, J. M., Radeck, D., Ramos Doval, D., Rausher, T., Reifarth, R., Rochman, D., Rubbia, C., Sabate-Gilarte, M., Saxena, A., Schillebeeckx, P., Schumann, D., Smith, A. G., Sosnin, N., Stamatopoulos, A., Tagliente, G., Tain, J. L., Talip, Z., Tarifeno-Saldivia, A. E., Tassan-Got, L., Tsinganis, A., Ulrich, J., Urlass, S., Valenta, S., Vannini, G., Variale, V., Vaz, P., Ventura, A., Vlachoudis, V., Vlastou, R., Wallner, A., Woods, P. J., Wright, T. J., Zugec, P., García-Ramos, José-Enrique, Andrés, María V., Lay Valera, José A., Moro, Antonio M., and Pérez-Bernal, Francisco

Subjects
Physics, Astrophysics::High Energy Astrophysical Phenomena, Detector, Gamma ray, i-TED, n_TOF, characterization, Neutron radiation, Radiation, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 030218 nuclear medicine & medical imaging, Nuclear physics, 03 medical and health sciences, Neutron capture, 0302 clinical medicine, Neutron cross section, Neutron, Gamma spectroscopy, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], iTED, n_TOF, neutron
Abstract

International audience; Neutron capture cross section measurements are of fundamental importance for the study of the slow process of neutron capture, so called s-process. This mechanism is responsible for the formation of most elements heavier than iron in the Universe. To this aim, installations and detectors have been developed, as total energy radiation C$_{6}$ D$_{6}$ detectors. However, these detectors can not distinguish between true capture gamma rays from the sample under study and neutron induced gamma rays produced in the surroundings of the setup. To improve this situation, we propose (Domingo Pardo in Nucl Instr Meth Phys Res A 825:78–86, 2016, [1]) the use of the Compton principle to select events produced in the sample and discard background events. This involves using detectors capable of resolving the interaction position of the gamma ray inside the detector itself, as well as a high energy resolution. These are the main features of i-TED, a total energy detector capable of gamma ray imaging. Such system is being developed at the “Gamma Spectroscopy and Neutrons Group” at IFIC ( http://webgamma.ific.uv.es/gamma/es/ , [2]), in the framework of the ERC-funded project HYMNS (High sensitivitY and Measurements of key stellar Nucleo-Synthesis reactions). This work summarizes first tests with neutron beam at CERN n $\_$ TOF.

Published
2018

39. Neutron spectroscopy of 26Mg states: Constraining the stellar neutron source 22Ne(α, n)25Mg

Author

D. Tarrío, C. Paradela, A. Manousos, Rene Reifarth, J. Marganiec, P. Schillebeeckx, M. A. Cortés-Giraldo, P. F. Mastinu, S. Valenta, Marco Calviani, Marco Pignatari, F. Mingrone, J. Andrzejewski, Srinivasan Ganesan, Alfredo Ferrari, M. Mastromarco, Petar Žugec, Carlo Rubbia, A. Mallick, J. M. Quesada, L. Tassan-Got, J. L. Tain, C. Lampoudis, F. Cerutti, G. Vannini, A. Tsinganis, Mario Barbagallo, C. Carrapiço, Sergio Cristallo, Anton Wallner, D. Schumann, R. Vlastou, P. Vaz, J. Billowes, Nicola Colonna, L.S. Leong, M. Krtička, F. Calviño, A. R. García, S. Altstadt, E. Jericha, Damir Bosnar, Y. Kadi, Vasilis Vlachoudis, Christoph Langer, T. Martinez, N. Kivel, Paolo Finocchiaro, D. M. Castelluccio, P. E. Koehler, A. J. M. Plompen, Alberto Ventura, M. S. Robles, R. Losito, C. Weiß, T. Wright, M. Brugger, Javier Praena, S. Lo Meo, V. Bécares, I. Van Rijs, M. Weigand, M. J. Vermeulen, F. Belloni, G. Tagliente, Alberto Mengoni, A. Musumarra, Stefan Kopecky, P. M. Milazzo, D. G. Jenkins, M. Kokkoris, K. Fraval, A. Hernández-Prieto, M. Diakaki, Luigi Cosentino, G. Giubrone, E. Leal-Cidoncha, F. Bečvář, C. Eleftheriadis, Giulia Clai, F. Käppeler, E. Chiaveri, I. Duran, D. Cano-Ott, I. F. Gonçalves, Thomas Rauscher, A. K. Saxena, R. Dressler, R. Wynants, A. Pavlik, T. Ware, A. Riego, C. Domingo-Pardo, E. Griesmayer, M. Sabaté-Gilarte, D. Karadimos, L. Audouin, Carlos Guerrero, C. Lederer, E. González-Romero, M. P. W. Chin, Jeri Kroll, R. Sarmento, S. Schmidt, M. Mirea, L. Piersanti, E. Berthoumieux, W. Mondelaers, V. Variale, E. Mendoza, S. Bisterzo, H. Leeb, J. Perkowski, F. Gunsing, Cristian Massimi, G. Cortes, ITA, GBR, FRA, DEU, ESP, AUS, AUT, BEL, JPN, GRC, IND, CZE, CHE, Massimi, C., Altstadt, S., Andrzejewski, J., Audouin, L., Barbagallo, M., Bécares, V., Bečvář, F., Belloni, F., Berthoumieux, E., Billowes, J., Bisterzo, S., Bosnar, D., Brugger, M., Calviani, M., Calviño, F., Cano-Ott, D., Carrapiço, C., Castelluccio, D.M., Cerutti, F., Chiaveri, E., Cosentino, L., Chin, M., Clai, G., Colonna, N., Cortés, G., Cortés-Giraldo, M.A., Cristallo, S., Diakaki, M., Domingo-Pardo, C., Duran, I., Dressler, R., Eleftheriadis, C., Ferrari, A., Finocchiaro, P., Fraval, K., Ganesan, S., García, A.R., Giubrone, G., Gonçalves, I.F., González-Romero, E., Griesmayer, E., Guerrero, C., Gunsing, F., Hernández-Prieto, A., Jenkins, D.G., Jericha, E., Kadi, Y., Käppeler, F., Karadimos, D., Kivel, N., Koehler, P., Kokkoris, M., Kopecky, S., Krtička, M., Kroll, J., Lampoudis, C., Langer, C., Leal-Cidoncha, E., Lederer, C., Leeb, H., Leong, L.S., Lo Meo, S., Losito, R., Mallick, A., Manousos, A., Marganiec, J., Martínez, T., Mastinu, P.F., Mastromarco, M., Mendoza, E., Mengoni, A., Milazzo, P.M., Mingrone, F., Mirea, M., Mondelaers, W., Musumarra, A., Paradela, C., Pavlik, A., Perkowski, J., Pignatari, M., Piersanti, L., Plompen, A., Praena, J., Quesada, J.M., Rauscher, T., Reifarth, R., Riego, A., Robles, M.S., Rubbia, C., Sabaté-Gilarte, M., Sarmento, R., Saxena, A., Schillebeeckx, P., Schmidt, S., Schumann, D., Tagliente, G., Tain, J.L., Tarrío, D., Tassan-Got, L., Tsinganis, A., Valenta, S., Vannini, G., Van Rijs, I., Variale, V., Vaz, P., Ventura, A., Vermeulen, M.J., Vlachoudis, V., Vlastou, R., Wallner, A., Ware, T., Weigand, M., Weiß, C., Wynants, R., Wright, T., Žugec, P., Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear, Institut de Physique Nucléaire d'Orsay ( IPNO ), Université Paris-Sud - Paris 11 ( UP11 ) -Institut National de Physique Nucléaire et de Physique des Particules du CNRS ( IN2P3 ) -Centre National de la Recherche Scientifique ( CNRS ), Institut de Recherches sur les lois Fondamentales de l'Univers ( IRFU ), Commissariat à l'énergie atomique et aux énergies alternatives ( CEA ) -Université Paris-Saclay, n_TOF, Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Universitat Politècnica de Catalunya. Departament de Física, Universitat Politècnica de Catalunya. ANT - Advanced Nuclear Technologies Research Group, and Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Capture, nucl-ex, Proce, 01 natural sciences, Espectroscòpia atòmica, Stellar nucleosynthesis, CERN, Neutron spectroscopy, [ PHYS.NEXP ] Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment, 010303 astronomy & astrophysics, Physics, Cross section, s Process, α+22Ne, lcsh:QC1-999, Neutron temperature, PRIRODNE ZNANOSTI. Fizika, Atomic spectroscopy, Excited state, Atomic physics, s Process, α+22Ne, Neutron spectroscopy, Nuclear and High Energy Physics, nTOF, Neutron, [formula omitted]Ne, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Neutron spectroscopy, s Process, α+22Ne, Nuclear and High Energy Physics, Nuclear physics, Experimental, TheoryofComputation_ANALYSISOFALGORITHMSANDPROBLEMCOMPLEXITY, 0103 physical sciences, Nuclear Physics - Experiment, Spin (physics), α+22 Ne, Energies::Energia nuclear [Àrees temàtiques de la UPC], Neutrons, Física [Àrees temàtiques de la UPC], 010308 nuclear & particles physics, NATURAL SCIENCES. Physics, Neutron source, Neutron spectroscopy, s Process, α+22Ne, α+Ne, s-process, lcsh:Physics
Abstract

This work reports on accurate, high-resolution measurements of the $^{25}$Mg($n, \gamma$)$^{26}$Mg and $^{25}$Mg($n, tot$) cross sections in the neutron energy range from thermal to about 300 keV, leading to a significantly improved $^{25}$Mg($n, \gamma$)$^{26}$Mg parametrization. The relevant resonances for $n+^{25}$Mg were characterized from a combined R-matrix analysis of the experimental data. This resulted in an unambiguous spin/parity assignment of the corresponding excited states in $^{26}$Mg. With this information experimental upper limits of the reaction rates for $^{22}$Ne($\alpha, n$)$^{25}$Mg and $^{22}$Ne($\alpha, \gamma$)$^{26}$Mg were established, potentially leading to a significantly higher ($\alpha, n$)/($\alpha, \gamma$) ratio than previously evaluated. The impact of these results have been studied for stellar models in the mass range 2 to 25 $M_{\odot}$., Comment: Preprint, 6 pages, 5 figures

Published
2017

40. Experimental neutron capture data of 58Ni from the CERN n-TOF facility

Author

M. B. Gómez-Hornillos, Christoph Langer, M. Mirea, Petar Žugec, A. K. Saxena, J. Billowes, F. Cerutti, Arnaud Ferrari, H. Leeb, A. J. M. Plompen, G. Vannini, P. Vaz, J. Perkowski, G. Tagliente, Alberto Ventura, Rene Reifarth, V. Bécares, M. Krtička, F. Calviño, Stefan Schmidt, D. Cano-Ott, Alberto Mengoni, S. Heinitz, Vittorio Boccone, M. Diakaki, C. Paradela, Mario Weigand, J. M. Quesada, L. Tassan-Got, E. Jericha, L. Audouin, G. Cortes, Javier Praena, S. Lo Meo, V. Variale, D. Tarrío, M. Kokkoris, J. L. Tain, Dorothea Schumann, C. Weiß, T. Martinez, Rugard Dressler, Jeri Kroll, Roberto Versaci, A. Tsinganis, G. Giubrone, Carlos Guerrero, Nicola Colonna, S. Altstadt, A. Pavlik, R. Sarmento, L.S. Leong, Vasilis Vlachoudis, C. Rubbia, F. Mingrone, J. Andrzejewski, C. Domingo-Pardo, A. Riegov, T. J. Wright, A. Manousos, J. Marganiec, I. F. Gonçalves, F. Bečvář, Roberto Losito, E. Mendoza, P. M. Milazzo, Peter Schillebeeckx, N. Dzysiuk, K. Fraval, F. Gunsing, C. Lederer, R. Vlastou, Fabio Belloni, E. Chiaveri, E. Berthoumieux, P. F. Mastinu, Cristian Massimi, Marco Pignatari, Damir Bosnar, Y. Kadi, S. Valenta, Marco Calviani, F. Käppeler, N. Kivel, P. Gurusamy, M. Meaze, M. J. Vermeulen, W. Mondalaers, M. Mastromarco, C. Carrapiço, Anton Wallner, I. Duran, D. G. Jenkins, M. A. Cortés-Giraldo, P. E. Koehler, T. Ware, E. Griesmayer, A. R. García, M. Brugger, Srinivasan Ganesan, Mario Barbagallo, M. P. W. Chin, F. Roman, C. Eleftheriadis, Thomas Rauscher, D. Karadimos, E. González-Romero, Žugec, P., Barbagallo, M., Colonna, N., Bosnar, D., Altstadt, S., Andrzejewski, J., Audouin, L., Bécares, V., Bečvář, F., Belloni, F., Berthoumieux, E., Billowes, J., Boccone, V., Brugger, M., Calviani, M., Calviño, F., Cano-Ott, D., Carrapiço, C., Cerutti, F., Chiaveri, E., Chin, M., Cortés, G., Cortés-Giraldo, M.A., Diakaki, M., Domingo-Pardo, C., Dressler, R., Duran, I., Dzysiuk, N., Eleftheriadis, C., Ferrari, A., Fraval, K., Ganesan, S., García, A.R., Giubrone, G., Gómez-Hornillos, M.B., Gonçalves, I.F., González-Romero, E., Griesmayer, E., Guerrero, C., Gunsing, F., Gurusamy, P., Heinitz, S., Jenkins, D.G., Jericha, E., Kadi, Y., Käppeler, F., Karadimos, D., Kivel, N., Koehler, P., Kokkoris, M., Krtička, M., Kroll, J., Langer, C., Lederer, C., Leeb, H., Leong, L.S., Lo Meo, S., Losito, R., Manousos, A., Marganiec, J., Martínez, T., Massimi, C., Mastinu, P.F., Mastromarco, M., Meaze, M., Mendoza, E., Mengoni, A., Milazzo, P.M., Mingrone, F., Mirea, M., Mondalaers, W., Paradela, C., Pavlik, A., Perkowski, J., Pignatari, M., Plompen, A., Praena, J., Quesada, J.M., Rauscher, T., Reifarth, R., Riegov, A., Roman, F., Rubbia, C., Sarmento, R., Saxena, A., Schillebeeckx, P., Schmidt, S., Schumann, D., Tagliente, G., Tain, J.L., Tarrío, D., Tassan-Got, L., Tsinganis, A., Valenta, S., Vannini, G., Variale, V., Vaz, P., Ventura, A., Versaci, R., Vermeulen, M.J., Vlachoudis, V., Vlastou, R., Wallner, A., Ware, T., Weigand, M., Weiß, C., Wright, T., Universitat Politècnica de Catalunya. Departament de Física, and Universitat Politècnica de Catalunya. ANT - Advanced Nuclear Technologies Research Group

Subjects
Nuclear reaction, nTOF, Physics::Instrumentation and Detectors, QC1-999, Astrophysics::High Energy Astrophysical Phenomena, Neutron, Nuclear physics, Physics and Astronomy (all), CERN, Neutron cross section, Nuclear Experiment, Energies::Energia nuclear [Àrees temàtiques de la UPC], Neutrons, Physics, Large Hadron Collider, Física [Àrees temàtiques de la UPC], Cross section, Reaccions nuclears, Resonance, Neutron temperature, Time of flight, Neutron capture, Nuclear reactions
Abstract

The neutron capture cross section of 58 Ni was measured at the neutron time of flight facility n_TOF at CERN, from 27 meV to 400 keV neutron energy. Special care has been taken to identify all the possible sources of background, with the so-called neutron background obtained for the first time using high-precision GEANT4 simulations. The energy range up to 122 keV was treated as the resolved resonance region, where 51 resonances were identified and analyzed by a multilevel R -matrix code SAMMY. Above 122 keV the code SESH was used in analyzing the unresolved resonance region of the capture yield. Maxwellian averaged cross sections were calculated in the temperature range of kT = 5 – 100 keV, and their astrophysical implications were investigated.

Published
2015

41. The nucleosynthesis of heavy elements in Stars: the key isotope 25Mg

Author

P. F. Mastinu, K. Fraval, M. Krtička, F. Calviño, T. Martinez, A. J. M. Plompen, J. L. Tain, Rene Reifarth, E. Chiaveri, Javier Praena, J. M. Quesada, L. Tassan-Got, F. Mingrone, J. Andrzejewski, F. Gunsing, C. Lampoudis, A. Riego, Srinivasan Ganesan, A. K. Saxena, G. Tagliente, Arnaud Ferrari, A. Pavlik, A. Hernández-Prieto, Cristian Massimi, Mario Barbagallo, A. Mallick, G. Vannini, C. Domingo-Pardo, M. Sabaté-Gilarte, F. Cerutti, Carlos Guerrero, Alberto Mengoni, T. Ware, Jeri Kroll, E. Griesmayer, A. Ventura, C. Rubbia, Roberto Losito, R. Sarmento, A. Tsinganis, G. Cortes, D. Tarrío, P. E. Koehler, P. Vaz, G. Giubrone, Rugard Dressler, E. Jericha, C. Paradela, I. Duran, L. Audouin, N. Kivel, Dorothea Schumann, Nicola Colonna, L.S. Leong, Vasilis Vlachoudis, C. Weiß, P. M. Milazzo, M. Mastromarco, C. Carrapiço, Anton Wallner, F. Bečvář, W. Mondalaers, E. Mendoza, Stefan Kopecky, D. G. Jenkins, Peter Schillebeeckx, F. Käppeler, S. Altstadt, V. Bécares, M. A. Cortés-Giraldo, R. Vlastou, E. Berthoumieux, Petar Žugec, A. Manousos, J. Marganiec, J. Billowes, M. S. Robles, D. Cano-Ott, M. Diakaki, T. J. Wright, I. F. Gonçalves, Fabio Belloni, Sebastian Schmidt, M. Mirea, H. Leeb, J. Perkowski, Mario Weigand, Damir Bosnar, Y. Kadi, S. Valenta, Marco Calviani, M. J. Vermeulen, V. Variale, E. Leal-Cidoncha, C. Eleftheriadis, Thomas Rauscher, D. Karadimos, E. González-Romero, M. P. W. Chin, A. R. García, M. Brugger, Christoph Langer, C. Lederer, Mengoni, A., Universitat Politècnica de Catalunya. Departament de Física i Enginyeria Nuclear, Universitat Politècnica de Catalunya. GREENER - Grup de recerca d'estudis energètics i de les radiacions, Lunardi, S., Massimi, C., Koehler, P., Kopecky, S., Mingrone, F., Schillebeeckx, P., Vannini, G., Altstadt, S., Andrzejewski, J., Audouin, L., Barbagallo, M., Bécares, V., Bečvář, F., Belloni, F., Berthoumieux, E., Billowes, J., Bosnar, D., Brugger, M., Calviani, M., Calviño, F., Cano-Ott, D., Carrapiço, C., Cerutti, F., Chiaveri, E., Chin, M., Colonna, N., Cortés, G., Cortés-Giraldo, M.A., Diakaki, M., Domingo-Pardo, C., Duran, I., Dressler, R., Eleftheriadis, C., Ferrari, A., Fraval, K., Ganesan, S., García, A.R., Giubrone, G., Gonçalves, I.F., González-Romero, E., Griesmayer, E., Guerrero, C., Gunsing, F., Hernández-Prieto, A., Jenkins, D.G., Jericha, E., Kadi, Y., Käppeler, F., Karadimos, D., Kivel, N., Krtička, M., Kroll, J., Lampoudis, C., Langer, C., Leal-Cidoncha, E., Lederer, C., Leeb, H., Leong, L.S., Losito, R., Mallick, A., Manousos, A., Marganiec, J., Martínez, T., Mastinu, P.F., Mastromarco, M., Mendoza, E., Milazzo, P.M., Mirea, M., Mondalaers, W., Paradela, C., Pavlik, A., Perkowski, J., Plompen, A., Praena, J., Quesada, J.M., Rauscher, T., Reifarth, R., Riego, A., Robles, M.S., Rubbia, C., Sabaté-Gilarte, M., Sarmento, R., Saxena, A., Schmidt, S., Schumann, D., Tagliente, G., Tain, J.L., Tarrío, D., Tassan-Got, L., Tsinganis, A., Valenta, S., Variale, V., Vaz, P., Ventura, A., Vermeulen, M.J., Vlachoudis, V., Vlastou, R., Wallner, A., Ware, T., Weigand, M., Weiß, C., Wright, T., and Žugec, P.

Subjects
Physics, Nuclear reaction, Energies::Energia nuclear [Àrees temàtiques de la UPC], Isotope, Stable isotope ratio, Physics::Instrumentation and Detectors, 25Mg, stellar nucleosynthesis, neutron capture, Astrophysics::High Energy Astrophysical Phenomena, QC1-999, Nuclear energy, Neutron temperature, Nuclear physics, Physics and Astronomy (all), Nucleosynthesis, Energia nuclear, Neutron, s-process, Nuclear Experiment, Isotopes of magnesium
Abstract

We have measured the radiative neutron-capture cross section and the total neutron-induced cross section of one of the most important isotopes for the s process, the 25Mg. The measurements have been carried out at the neutron time-of-flight facilities n-TOF at CERN (Switzerland) and GELINA installed at the EC-JRC-IRMM (Belgium). The cross sections as a function of neutron energy have been measured up to approximately 300 keV, covering the energy region of interest to the s process. The data analysis is ongoing and preliminary results show the potential relevance for the s process. © Owned by the authors, published by EDP Sciences, 2014.

Published
2014

42. Measurements of neutron cross sections for advanced nuclear energy systems at n-TOF (CERN)

Author

Srinivasan Ganesan, M. Mirea, A. Hernández-Prieto, G. Vannini, H. Leeb, J. L. Tain, J. Perkowski, W. Mondalaers, V. Variale, Christoph Langer, F. Gunsing, G. Tagliente, N. Kivel, Rene Reifarth, A. Manousos, Cristian Massimi, Stefan Schmidt, A. Riego, T. J. Wright, J. M. Quesada, G. Cortes, J. Marganiec, M. Krtička, D. Tarrío, L. Tassan-Got, G. Giubrone, F. Calviño, C. Rubbia, Petar Žugec, A. K. Saxena, Arnaud Ferrari, T. Martinez, Roberto Losito, J. Billowes, F. Mingrone, J. Andrzejewski, F. Bečvář, Mario Weigand, M. Mastromarco, E. Chiaveri, P. F. Mastinu, E. Mendoza, F. Käppeler, Massimo Barbagallo, C. Carrapiço, Anton Wallner, Rugard Dressler, A. Pavlik, C. Lampoudis, D. Cano-Ott, A. Ventura, Peter Schillebeeckx, C. Lederer, N. Colonna, C. Domingo-Pardo, M. Diakaki, P. M. Milazzo, A. Tsinganis, R. Vlastou, E. Berthoumieux, Alberto Mengoni, M. Sabaté-Gilarte, L.S. Leong, I. F. Gonçalves, Vasilis Vlachoudis, E. Leal-Cidoncha, K. Fraval, S. Altstadt, C. Paradela, Fabio Belloni, C. Eleftheriadis, L. Audouin, V. Bécares, Thomas Rauscher, Damir Bosnar, D. Karadimos, P. Vaz, E. González-Romero, Y. Kadi, E. Jericha, Dorothea Schumann, M. P. W. Chin, C. Weiß, Carlos Guerrero, A. R. García, M. Brugger, M. J. Vermeulen, P. E. Koehler, S. Valenta, F. Cerutti, Marco Calviani, I. Duran, T. Ware, E. Griesmayer, Javier Praena, D. G. Jenkins, M. A. Cortés-Giraldo, Jeri Kroll, R. Sarmento, A. J. M. Plompen, Ventura, A., Mengoni, A., Universitat Politècnica de Catalunya. Departament de Física i Enginyeria Nuclear, Universitat Politècnica de Catalunya. GREENER - Grup de recerca d'estudis energètics i de les radiacions, Lunardi, S., Barbagallo, M., Colonna, N., Altstadt, S., Andrzejewski, J., Audouin, L., Bécares, V., Bečvář, F., Belloni, F., Berthoumieux, E., Billowes, J., Bosnar, D., Brugger, M., Calviani, M., Calviño, F., Cano-Ott, D., Carrapiço, C., Cerutti, F., Chiaveri, E., Chin, M., Cortés, G., Cortés-Giraldo, M.A., Diakaki, M., Domingo-Pardo, C., Duran, I., Dressler, R., Eleftheriadis, C., Ferrari, A., Fraval, K., Ganesan, S., García, A.R., Giubrone, G., Gonçalves, I.F., González-Romero, E., Griesmayer, E., Guerrero, C., Gunsing, F., Hernández-Prieto, A., Jenkins, D.G., Jericha, E., Kadi, Y., Käppeler, F., Karadimos, D., Kivel, N., Koehler, P., Krtička, M., Kroll, J., Lampoudis, C., Langer, C., Leal-Cidoncha, E., Lederer, C., Leeb, H., Leong, L.S., Losito, R., Manousos, A., Marganiec, J., Martínez, T., Massimi, C., Mastinu, P.F., Mastromarco, M., Mendoza, E., Milazzo, P.M., Mingrone, F., Mirea, M., Mondalaers, W., Paradela, C., Pavlik, A., Perkowski, J., Plompen, A., Praena, J., Quesada, J.M., Rauscher, T., Reifarth, R., Riego, A., Rubbia, C., Sabaté-Gilarte, M., Sarmento, R., Saxena, A., Schillebeeckx, P., Schmidt, S., Schumann, D., Tagliente, G., Tain, J.L., Tarrío, D., Tassan-Got, L., Tsinganis, A., Valenta, S., Vannini, G., Variale, V., Vaz, P., Vermeulen, M.J., Vlachoudis, V., Vlastou, R., Wallner, A., Ware, T., Weigand, M., Weiß, C., Wright, T., and Žugec, P.

Subjects
Nuclear reaction, Physics, Energies::Energia nuclear [Àrees temàtiques de la UPC], QC1-999, Nuclear Theory, Nuclear data, Nuclear energy, Neutron radiation, Nuclear physics, Uranium-236, Physics and Astronomy (all), Plutonium-242, Nuclear astrophysics, Neutron source, Energia nuclear, Physics::Accelerator Physics, Neutron, neutron cross sections, n_TOF, advanced nuclear energy systems, Nuclear Experiment
Abstract

The n-TOF facility operates at CERN with the aim of addressing the request of high accuracy nuclear data for advanced nuclear energy systems as well as for nuclear astrophysics. Thanks to the features of the neutron beam, important results have been obtained on neutron induced fission and capture cross sections of U, Pu and minor actinides. Recently the construction of another beam line has started; the new line will be complementary to the first one, allowing to further extend the experimental program foreseen for next measurement campaigns. © Owned by the authors, published by EDP Sciences, 2014.

Published
2014

43. Neutron cross-sections for advanced nuclear systems: The n-TOF project at CERN

Author

G. Tagliente, V. Variale, F. Cerutti, Mario Weigand, M. P. W. Chin, Y. Kadi, C. Lederer, R. Vlastou, E. Chiaveri, C. Paradela, G. Giubrone, P. F. Mastinu, E. Berthoumieux, A. Manousos, S. Valenta, P. Vaz, L. Audouin, Rugard Dressler, Marco Calviani, M. Mirea, Christoph Langer, J. Marganiec, A. Tsinganis, T. Ware, F. Mingrone, J. Andrzejewski, Javier Praena, Petar Žugec, S. Altstadt, A. Ventura, E. Leal-Cidoncha, A. K. Saxena, Arnaud Ferrari, Srinivasan Ganesan, M. Krtička, E. Jericha, C. Eleftheriadis, F. Calviño, E. Griesmayer, L.S. Leong, H. Leeb, Vasilis Vlachoudis, F. Käppeler, Dorothea Schumann, C. Weiß, F. Bečvář, T. Martinez, J. Perkowski, J. Billowes, E. Mendoza, I. F. Gonçalves, M. A. Cortés-Giraldo, M. J. Vermeulen, M. Mastromarco, F. Gunsing, Peter Schillebeeckx, C. Lampoudis, A. Hernández-Prieto, Massimo Barbagallo, Thomas Rauscher, N. Colonna, D. Bosnar, C. Carrapiço, Cristian Massimi, Anton Wallner, Fabio Belloni, D. Karadimos, A. Riego, Jeri Kroll, Roberto Losito, V. Bécares, I. Duran, E. González-Romero, T. J. Wright, D. Cano-Ott, Rene Reifarth, R. Sarmento, K. Fraval, A. J. M. Plompen, M. Diakaki, A. R. García, W. Mondalaers, Carlos Guerrero, M. Brugger, A. Pavlik, C. Domingo-Pardo, D. G. Jenkins, M. Sabaté-Gilarte, P. E. Koehler, P. M. Milazzo, G. Cortes, D. Tarrío, G. Vannini, C. Rubbia, Stefan Schmidt, J. M. Quesada, L. Tassan-Got, Alberto Mengoni, J. L. Tain, Niko Kivel, Sarkadi, L., Barbagallo, M, Mastromarco, M., Colonna, N., Altstadt, S., Andrzejewski, J., Audouin, L., Bécares, V., Bečvář, F., Belloni, F., Berthoumieux, E., Billowes, J., Bosnar, D., Brugger, M., Calviani, M., Calviño, F., Cano-Ott, D., Carrapiço, C., Cerutti, F., Chiaveri, E., Chin, M., Cortés, G., Cortés-Giraldo, M.A., Diakaki, M., Domingo-Pardo, C., Duran, I., Dressler, R., Eleftheriadis, C., Ferrari, A., Fraval, K., Ganesan, S., García, A.R., Giubrone, G., Gonçalves, I.F., González-Romero, E., Griesmayer, E., Guerrero, C., Gunsing, F., Hernández-Prieto, A., Jenkins, D.G., Jericha, E., Kadi, Y., Käppeler, F., Karadimos, D., Kivel, N., Koehler, P., Krtička, M., Kroll, J., Lampoudis, C., Langer, C., Leal-Cidoncha, E., Lederer, C., Leeb, H., Leong, L.S., Losito, R., Manousos, A., Marganiec, J., Martínez, T., Massimi, C., Mastinu, P.F., Mendoza, E., Mengoni, A., Milazzo, P.M., Mingrone, F., Mirea, M., Mondalaers, W., Paradela, C., Pavlik, A., Perkowski, J., Plompen, A., Praena, J., Quesada, J.M., Rauscher, T., Reifarth, R., Riego, A., Rubbia, C., Sabaté-Gilarte, M., Sarmento, R., Saxena, A., Schillebeeckx, P., Schmidt, S., Schumann, D., Tagliente, G., Tain, J.L., Tarrío, D., Tassan-Got, L., Tsinganis, A., Valenta, S., Vannini, G., Variale, V., Vaz, P., Ventura, A., Vermeulen, M.J., Vlachoudis, V., Vlastou, R., Wallner, A., Ware, T., Weigand, M., Weiss, C., Wright, T., Žugec, P., Universitat Politècnica de Catalunya. Departament de Física, and Universitat Politècnica de Catalunya. ANT - Advanced Nuclear Technologies Research Group

Subjects
Nuclear reaction, Computer science, Nuclear engineering, QC1-999, Astrophysics::High Energy Astrophysical Phenomena, Nuclear Theory, Nuclear physics, Context (language use), Neutron, 7. Clean energy, 01 natural sciences, Physics and Astronomy (all), Stellar nucleosynthesis, CERN, 0103 physical sciences, n_TOF, 010306 general physics, Nuclear Experiment, Energies::Energia nuclear [Àrees temàtiques de la UPC], Neutrons, Large Hadron Collider, Física [Àrees temàtiques de la UPC], 010308 nuclear & particles physics, Physics, Radioactive waste, Neutron radiation, Engineering physics, Nuclear technology, Time of flight facility, Física nuclear, Nuclear reactions
Abstract

The study of neutron-induced reactions is of high relevance in a wide variety of fields, ranging from stellar nucleosynthesis and fundamental nuclear physics to applications of nuclear technology. In nuclear energy, high accuracy neutron data are needed for the development of Generation IV fast reactors and accelerator driven systems, these last aimed specifically at nuclear waste incineration, as well as for research on innovative fuel cycles. In this context, a high luminosity Neutron Time Of Flight facility, n-TOF, is operating at CERN since more than a decade, with the aim of providing new, high accuracy and high resolution neutron cross-sections. Thanks to the features of the neutron beam, a rich experimental program relevant to nuclear technology has been carried out so far. The program will be further expanded in the near future, thanks in particular to a new high-flux experimental area, now under construction.

Published
2014

44. 238U(n, gamma) reaction cross section measurement with C6D6 detectors at the n_TOF CERN facility

Author

G. Cortes, D. Tarrío, C. Lederer, F. Bečvář, F. Käppeler, E. Mendoza, I. Duran, F. Cerutti, Peter Schillebeeckx, F. Mingrone, C. Lampoudis, Y. Kadi, J. Andrzejewski, T. Ware, V. Bécares, E. Griesmayer, A. Riego, A. Mallick, G. Vannini, A. K. Saxena, G. Tagliente, Javier Praena, P. M. Milazzo, Arnaud Ferrari, V. Variale, Jeri Kroll, M. P. W. Chin, M. S. Robles, M. J. Vermeulen, J. Billowes, P. E. Koehler, E. Jericha, I. F. Gonçalves, P. Vaz, Sebastian Schmidt, S. Altstadt, D. Cano-Ott, Dorothea Schumann, C. Weiß, S. Valenta, M. Diakaki, R. Sarmento, Marco Calviani, Fabio Belloni, R. Vlastou, A. Manousos, E. Berthoumieux, J. Marganiec, A. R. García, D. Bosnar, M. Brugger, G. Giubrone, A. J. M. Plompen, Carlos Guerrero, E. Leal-Cidoncha, C. Eleftheriadis, Thomas Rauscher, D. Karadimos, T. J. Wright, E. González-Romero, Christoph Langer, Petar Žugec, A. Pavlik, C. Domingo-Pardo, M. Sabaté-Gilarte, C. Paradela, L. Audouin, W. Mondalaers, Pierfrancesco Mastinu, D. G. Jenkins, Roberto Losito, M. A. Cortés-Giraldo, Srinivasan Ganesan, Rugard Dressler, A. Tsinganis, Nicola Colonna, L.S. Leong, Vasilis Vlachoudis, Mario Barbagallo, C. Rubbia, J. L. Tain, Niko Kivel, K. Fraval, Alberto Mengoni, E. Chiaveri, M. Mirea, H. Leeb, J. Perkowski, F. Gunsing, Cristian Massimi, M. Krtička, F. Calviño, Mario Weigand, A. Ventura, T. Martinez, Rene Reifarth, J. M. Quesada, L. Tassan-Got, A. Hernández-Prieto, M. Mastromarco, C. Carrapiço, Anton Wallner, Ventura, A., Mengoni, A., Universitat Politècnica de Catalunya. Departament de Física i Enginyeria Nuclear, Universitat Politècnica de Catalunya. Institut de Tècniques Energètiques, Universitat Politècnica de Catalunya. GREENER - Grup de recerca d'estudis energètics i de les radiacions, INPC 2013 – International Nuclear Physics Conference, Lunardi, S., Mingrone, F., Massimi, C., Vannini, G., Altstadt, S., Andrzejewski, J., Audouin, L., Barbagallo, M., Bécares, V., Bečvář, F., Belloni, F., Berthoumieux, E., Billowes, J., Bosnar, D., Brugger, M., Calviani, M., Calviño, F., Cano-Ott, D., Carrapiço, C., Cerutti, F., Chiaveri, E., Chin, M., Colonna, N., Cortés, G., Cortés-Giraldo, M.A., Diakaki, M., Domingo-Pardo, C., Duran, I., Dressler, R., Eleftheriadis, C., Ferrari, A., Fraval, K., Ganesan, S., García, A.R., Giubrone, G., Gonçalves, I.F., González-Romero, E., Griesmayer, E., Guerrero, C., Gunsing, F., Hernández-Prieto, A., Jenkins, D.G., Jericha, E., Kadi, Y., Käppeler, F., Karadimos, D., Kivel, N., Koehler, P., Krtička, M., Kroll, J., Lampoudis, C., Langer, C., Leal-Cidoncha, E., Lederer, C., Leeb, H., Leong, L.S., Losito, R., Mallick, A., Manousos, A., Marganiec, J., Martínez, T., Mastinu, P.F., Mastromarco, M., Mendoza, E., Milazzo, P.M., Mirea, M., Mondalaers, W., Paradela, C., Pavlik, A., Perkowski, J., Plompen, A., Praena, J., Quesada, J.M., Rauscher, T., Reifarth, R., Riego, A., Robles, M.S., Rubbia, C., Sabaté-Gilarte, M., Sarmento, R., Saxena, A., Schillebeeckx, P., Schmidt, S., Schumann, D., Tagliente, G., Tain, J.L., Tarrío, D., Tassan-Got, L., Tsinganis, A., Valenta, S., Variale, V., Vaz, P., Vermeulen, M.J., Vlachoudis, V., Vlastou, R., Wallner, A., Ware, T., Weigand, M., Weiß, C., Wright, T., and Žugec, P.

Subjects
Physics, Nuclear reaction, Energies::Energia nuclear [Àrees temàtiques de la UPC], Scintillation, Background subtraction, 010308 nuclear & particles physics, QC1-999, 238U, neutron capture, n_TOF, Nuclear energy, 01 natural sciences, Engineering physics, Particle detector, Nuclear physics, Physics and Astronomy (all), Cross section (physics), 0103 physical sciences, Scintillation counter, Measuring instrument, Energia nuclear, ddc:530, 010306 general physics, Data reduction
Abstract

The radiative capture cross section of 238U is very important for the developing of new reactor technologies and the safety of existing ones. Here the preliminary results of the 238U(n,γ) cross section measurement performed at n-TOF with C6D6 scintillation detectors are presented, paying particular attention to data reduction and background subtraction. © Owned by the authors, published by EDP Sciences, 2014.

Published
2013

45. Performance of the neutron time-of-flight facility n_TOF at CERN

Author

F. Bečvář, M. Mirea, Yacine Kadi, P. Vaz, L. Audouin, M. B. Gómez-Hornillos, Carlos Guerrero, M. P. W. Chin, Alberto Ventura, Peter Schillebeeckx, N. Dzysiuk, Kathrin Göbel, Petar Žugec, H. Leeb, A. Manousos, F. Roman, Alfredo Ferrari, P. M. Milazzo, J. Perkowski, E. Chiaveri, C. Lampoudis, Srinivasan Ganesan, M. A. Cortés-Giraldo, D. Cano-Ott, A. J. M. Plompen, S. Altstadt, G. Giubrone, R. Versaci, J. Billowes, Mario Weigand, G. Tagliente, A. Pavlik, C. Domingo-Pardo, Fabio Belloni, A. Hernández-Prieto, A. R. García, M. Sabaté-Gilarte, F. Mingrone, J. Andrzejewski, V. Bécares, Mario Barbagallo, E. Jericha, M. Kokkoris, F. Gunsing, T. J. Wright, Rugard Dressler, M. Brugger, Dorothea Schumann, Carlo Rubbia, J. L. Tain, C. Langer, V. Vlachoudis, M. Meaze, Rene Reifarth, Jeri Kroll, M. Diakaki, Cristian Massimi, V. Boccone, Patrick Steinegger, W. Mondalaers, Stefan Schmidt, E. Mendoza, R. Sarmento, J. M. Quesada, E. Berthoumieux, Javier Praena, E. Leal-Cidoncha, A. Tsinganis, D. G. Jenkins, Laurent Tassan-Got, C. Eleftheriadis, I. Goncalves, T. Papaevangelou, Thomas Rauscher, M. Mastromarco, Nicola Colonna, L.S. Leong, C. Carrapiço, Anton Wallner, P. E. Koehler, D. Karadimos, C. Paradela, A. K. Saxena, M. J. Vermeulen, Roberto Losito, F. Cerutti, S. Valenta, I. Duran, Alberto Mengoni, Marco Calviani, C. Weiß, R. Vlastou, T. Ware, Damir Bosnar, E. Griesmayer, V. Variale, A. Riego, C. Lederer, F. Käppeler, N. Kivel, P. Gurusamy, G. Vannini, G. Cortes, D. Tarrío, T. Martinez, E. Gonzalez-Romero, K. Fraval, J. Marganiec, S. Andriamonje, P. F. Mastinu, M. Krtička, F. Calviño, Ventura, A., Mengoni, A., Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, nTOF, Universitat Politècnica de Catalunya. Departament de Física i Enginyeria Nuclear, Universitat Politècnica de Catalunya. GREENER - Grup de recerca d'estudis energètics i de les radiacions, Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear, Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Guerrero C., Tsinganis A., Berthoumieux E., Barbagallo M., Belloni F., Gunsing F., Weiss C., Chiaveri E., Calviani M., Vlachoudis V., Altstadt S., Andriamonje S., Andrzejewski J., Audouin L., Bécares V., Becvar F., Billowes J., Boccone V., Bosnar D., Brugger M., Calvino F., Cano-Ott D., Carrapico C., Cerutti F., Chin M., Colonna N., Cortès G., Cortes-Giraldo M.A., Diakaki M., Domingo-Pardo C., Duran I., Dressler R., Dzysiuk N., Eleftheriadis C., Ferrari A., Fraval K., Ganesan S., Garcia A.R., Giubrone G., Gobel K., Gomez-Hornillos M.B., Gonzalves I.F., Gonzalez-Romero E., Griesmayer E., Gurusamy P., Hernandez-Prieto A., Jenkins D.G., Jericha E., Kadi Y., Kappeler F., Karadimos D., Kivel N., Koehler P., Kokkoris M., Krtika M., Kroll J., Lampoudis C., Langer C., Leal-Cidoncha E., Lederer C., Leeb H., Leong L.S., Losito R., Manousos A., Marganiec J., Martinez T., Massimi C., Mastinu P.F., Mastromarco M., Meaze M., Mendoza E., Mengoni A., Milazzo P.M., Mingrone F., Mirea M., Mondalaers W., Papaevangelou T., Paradela C., Pavlik A., Perkowski J., Plompen A., Praena J., Quesada J.M., Rauscher T., Reifarth R., Riego A., Roman F., Rubbia C., Sabate-Gilarte M., Sarmento R., Saxena A., Schillebeeckx P., Schmidt S., Schumann D., Steinegger P., Tagliente G., Tain J.L., Tarrio D., Tassan-Got L., Valenta S., Vannini G., Variale V., Vaz P., Ventura A., Versaci R., Vermeulen M.J., Vlastou R., Wallner A., Ware T., Weigand M., Wright T., and Zugec P.

Subjects
Nuclear and High Energy Physics, Astrophysics::High Energy Astrophysical Phenomena, Física::Física de partícules [Àrees temàtiques de la UPC], Neutron scattering, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, 7. Clean energy, Neutron time-of-flight scattering, MEASUREMENT, PERFORMANCE REPORT, Nuclear physics, Neutron flux, 0103 physical sciences, Neutron cross section, Neutron detection, Neutron, 010306 general physics, Nuclear Experiment, Physics, Energies::Energia nuclear [Àrees temàtiques de la UPC], Neutrons, NEUTRON CROSS SECTION, 010308 nuclear & particles physics, Neutron temperature, n_TOF facility, Neutron source, Physics::Accelerator Physics, TIME OF FLIGHT
Abstract

The neutron time-of-flight facility n TOF features a white neutron source produced by spallation through 20 GeV/c protons impinging on a lead target. The facility, aiming primarily at the measurement of neutron-induced reaction cross sections, was operating at CERN between 2001 and 2004, and then underwent a major upgrade in 2008. This paper presents in detail all the characteristics of the new neutron beam in the currently available configurations, which correspond to two different collimation systems and two choices of neutron moderator. The characteristics discussed include the intensity and energy dependence of the neutron flux, the spatial profile of the beam, the in-beam background components and the energy resolution/broadening. The discussion of these features is based on dedicated measurements and Monte Carlo simulations, and includes estimations of the systematic uncertainties of the mentioned quantities.

Published
2013

46. Angular distribution in the neutron-induced fission of actinides

Author

A. Manousos, Willy Mondelaers, A. Mengon, R. Sarmento, C. Eleftheriadis, M. B. Gómez-Hornillos, D. Schumann, G. Cortes, Thomas Rauscher, D. Tarrío, M. Mirea, Carlos Guerrero, R. Dressler, M. Mastromarco, F. Roman, S. Valenta, González-Romero, P. E. Koehler, R. Reifhart, G. Korschinek, C. Carrapiço, J. Billowes, J. Marganiec, V. Vlastou, T. Ware, A. R. García, Anton Wallner, C. Paradela, M. Brugger, V. Variale, G. Giubrone, L. Audouin, G. Tagliente, F. Calviño, P. Gurusamy, G. Vannini, E. Jericha, E. Griesmayer, C. Rubbia, E. Mendoza, Jan Perkowski, M. Weigand, M. P. W. Chin, Nicola Colonna, F. Bečvář, L.S. Leong, V. Vlachoudis, K. Fraval, M. Diakaki, R. Versaci, C. Weiß, I. Duran, N. Dzysiuk, P. F. Mastinu, E. Berthoumieux, E. Kadi, Marco Pignatari, C. Le Naour, A. Riego, P. Schillebeeckx, V. Bécares, Arnaud Ferrari, F. Gunsing, M. Meaze, T. Wright, I. F. Gonçalves, Cristian Massimi, J. L. Tain, M. Krtička, Marco Calviani, C. Lederer, T. Martinez, Fabio Belloni, S. Altstadt, A. Plompen, P. M. Milazzo, N. Kivel, A. Pavlik, C. Langer, C. Domingo-Pardo, A. Tsinganis, F. Käppeler, D. Karadimos, D. Bosnar, M. Kokkoris, T. Mingrone, E. Chiaveri, M. J. Vermeulen, Srinivasan Ganesan, D. G. Jenkins, D. Cano-Ott, Hannes Leeb, Mario Barbagallo, M. A. Cortés-Giraldo, J. Andrzejewsky, R. Losito, J. Kroll, P. Vaz, Javier Praena, Alberto Ventura, Zǔgec, Stefan Schmidt, Vittorio Boccone, J. M. Quesada, L. Tassan-Got, F. Cerutti, Universitat Politècnica de Catalunya. Departament de Física, Universitat Politècnica de Catalunya. ANT - Advanced Nuclear Technologies Research Group, Mengoni, A., Chatillon, A., Leong, L.S., Tassan-Got, L., Tarrio, D., Audouin, L., Paradela, C., Duran, I., Le Naour, C., Altstadt, S., Andrzejewsky, J., Barbagallo, M., Bécares, V., Bečvář, F., Belloni, F., Berthoumieux, E., Billowes, J., Boccone, V., Bosnar, D., Brugger, M., Calvino, F., Calviani, M., Cano-Ott, D., Carrapiço, C., Cerutti, F., Chiaveri, E., Chin, M., Colonna, N., Cortés, G., Cortés-Giraldo, M.A., Diakaki, M., Domingo-Pardo, C., Dressler, R., Dzysiuk, N., Eleftheriadis, C., Ferrari, A., Fraval, K., Ganesan, S., García, A.R., Giubrone, G., Gómez-Hornillos, M.B., Gonçalves, I.F., González, Romero, Griesmayer, E., Guerrero, C., Gunsing, F., Gurusamy, P., Jenkins, D.G., Jericha, E., Kadi, E., Käppeler, F., Karadimos, D., Kivel, N., Koehler, P., Kokkoris, M., Korschinek, G., Kroll, J., Krtička, M., Langer, C., Lederer, C., Leeb, H., Losito, R., Manousos, A., Marganiec, J., Massimi, C., Martínez, T., Mastinu, P.F., Mastromarco, M., Meaze, M., Mengon, A., Mendoza, E., Milazzo, P.M., Mingrone, T., Mirea, M., Mondelaers, W., Pavlik, A., Perkowski, J., Pignatari, M., Plompen, A., Praena, J., Quesada, J.M., Rauscher, T., Reifhart, R., Riego, A., Roman, F., Rubbia, C., Sarmento, R., Schillebeeckx, P., Schmidt, S., Schumann, D., Taín, J.L., Tagliente, G., Tsinganis, A., Valenta, S., Vannini, G., Variale, V., Vaz, P., Ventura, A., Versaci, R., Vermeulen, M.J., Vlachoudis, V., Vlastou, V., Wallner, A., Ware, T., Weigand, M., Weiß, C., Wright, T., and Zç, Gec

Subjects
Nuclear reaction, Nuclear fission product, Fission, QC1-999, health care facilities, manpower, and services, education, Nuclear Theory, Nuclear physics, Neutron induced fission, Neutron, 7. Clean energy, 01 natural sciences, Physics and Astronomy (all), Angular distribution, 0103 physical sciences, CERN, Physics::Atomic and Molecular Clusters, n_TOF, 010306 general physics, Spectroscopy, Nuclear Experiment, health care economics and organizations, Physics, Energies::Energia nuclear [Àrees temàtiques de la UPC], Neutrons, Física [Àrees temàtiques de la UPC], Cross section, 010308 nuclear & particles physics, neutron induced fission, angular distribution, actinides, Actinide, Nuclear fission, Física nuclear
Abstract

Above 1 MeV of incident neutron energy the fission fragment angular distribution (FFAD) has generally a strong anisotropic behavior due to the combination of the incident orbital momentum and the intrinsic spin of the fissioning nucleus. This effect has to be taken into account for the efficiency estimation of devices used for fission cross section measurements. In addition it bears information on the spin deposition mechanism and on the structure of transitional states. We designed and constructed a detection device, based on Parallel Plate Avalanche Counters (PPAC), for measuring the fission fragment angular distributions of several isotopes, in particular 232Th. The measurement has been performed at n-TOF at CERN taking advantage of the very broad energy spectrum of the neutron beam. Fission events were recognized by back to back detection in coincidence in two position-sensitive detectors surrounding the targets. The detection efficiency, depending mostly on the stopping of fission fragments in backings and electrodes, has been computed with a Geant4 simulation and validated by the comparison to the measured case of 235U below 3 keV where the emission is isotropic. In the case of 232Th, the result is in good agreement with previous data below 10 MeV, with a good reproduction of the structures associated to vibrational states and the opening of second chance fission. In the 14 MeV region our data are much more accurate than previous ones which are broadly scattered. © Owned by the authors, published by EDP Sciences, 2013.

Published
2013
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47. The new vertical neutron beam line at the CERN n_TOF facility design and outlook on the performance

Author

M. Kokkoris, A. K. Saxena, Arnaud Ferrari, J. Billowes, I. Duran, S. Girod, P. Vaz, Rugard Dressler, N. Kivel, G. Cortes, A. Tsinganis, M. A. Cortés-Giraldo, C. Weiß, Nicola Colonna, Alberto Ventura, M. Krtička, F. Calviño, M. Mastromarco, A. Kimura, J. Marganiec, R. Palomo Pinto, F. Gunsing, I. F. Gonçalves, F. Bečvář, R. J. W. Frost, T. Martinez, P. Kavrigin, E. Mendoza, Srinivasan Ganesan, R. Vlastou, E. Berthoumieux, M. Brugger, A. Stamatopoulos, Ralf Nolte, Cristian Massimi, Anton Wallner, A. Pavlik, C. Paradela, M. Bacak, V. Khryachkov, C. Domingo-Pardo, L. A. Damone, G. Vannini, Peter Schillebeeckx, E. Griesmayer, M. Sabaté-Gilarte, Fabio Belloni, Petar Žugec, Luigi Cosentino, D. Macina, Carlos Guerrero, M. Caamaño, G. Smith, V. Bécares, Mario Barbagallo, Roberto Losito, E. Leal-Cidoncha, F. Käppeler, M. Mirea, M. Licata, N. Patronis, Patrick Steinegger, J. L. Tain, E. Chiaveri, J. Balibrea-Correa, S. Warren, M. S. Robles, P. F. Mastinu, Thomas Rauscher, Damir Bosnar, S. Heinitz, Y. Kadi, D. López, E. Dupont, H. Leeb, D. Cano-Ott, V. Variale, I. Bergström, S. Valenta, A. Musumarra, M. Diakaki, J. Perkowski, P. V. Sedyshev, P. Ferreira, Marco Calviani, Hideo Harada, P. M. Milazzo, I. Porras, E. González-Romero, J. Lerendegui, V. Furman, T. J. Wright, K. Deo, Mario Weigand, C. Rubbia, V. Ketlerov, Tanja Heftrich, F. Mingrone, J. Andrzejewski, A. Riego-Perez, Saraswatula Venkata Suryanarayana, B. Fernández-Domínguez, E. Jericha, A. Gheorghe, V. Vlachoudis, Ariel Tarifeño-Saldivia, T. Glodariu, Paolo Finocchiaro, Dorothea Schumann, J. A. Ryan, Alberto Mengoni, G. Tagliente, A. Hernández-Prieto, Rene Reifarth, Stefan Schmidt, J. M. Quesada, L. Tassan-Got, Tatsuya Katabuchi, S. Barros, Francesca Matteucci, C. Beinrucker, O. Aberle, A. Goverdovski, S. Montesano, C. Lederer, Kathrin Göbel, Jan Heyse, L. Audouin, D. G. Jenkins, Javier Praena, S. Lo Meo, F. Cerutti, Universitat Politècnica de Catalunya. Departament de Física, Universitat Politècnica de Catalunya. Institut de Tècniques Energètiques, Universitat Politècnica de Catalunya. ANT - Advanced Nuclear Technologies Research Group, Universitat Politècnica de Catalunya. NERG - Grup de Recerca d'Enginyeria Nuclear, Mengoni, A., Lo Meo, S., Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), n_TOF Collaboration, Weiß, C, Chiaveri, E., Girod, S., Vlachoudis, V., Aberle, O., Barros, S., Bergström, I., Berthoumieux, E., Calviani, M., Guerrero, C., Sabaté-Gilarte, M., Tsinganis, A., Andrzejewski, J., Audouin, L., Bacak, M., Balibrea-Correa, J., Barbagallo, M., Bécares, V., Beinrucker, C., Belloni, F., Bečvář, F., Billowes, J., Bosnar, D., Brugger, M., Caamaño, M., Calviño, F., Cano-Ott, D., Cerutti, F., Colonna, N., Cortés, G., Cortés-Giraldo, M.A., Cosentino, L., Damone, L., Deo, K., Diakaki, M., Domingo-Pardo, C., Dupont, E., Durán, I., Dressler, R., Fernández-Domínguez, B., Ferrari, A., Ferreira, P., Finocchiaro, P., Frost, R., Furman, V., Ganesan, S., Gheorghe, A., Glodariu, T., Göbel, K., Gonçalves, I.F., González-Romero, E., Goverdovski, A., Griesmayer, E., Gunsing, F., Harada, H., Heftrich, T., Heinitz, S., Hernández-Prieto, A., Heyse, J., Jenkins, D.G., Jericha, E., Kadi, Y., Käppeler, F., Katabuchi, T., Kavrigin, P., Ketlerov, V., Khryachkov, V., Kimura, A., Kivel, N., Kokkoris, M., Krtička, M., Leal-Cidoncha, E., Lederer, C., Leeb, H., Lerendegui, J., Licata, M., López, D., Losito, R., Macina, D., Marganiec, J., Martínez, T., Massimi, C., Mastinu, P.F., Mastromarco, M., Matteucci, F., Mendoza, E., Milazzo, P.M., Mingrone, F., Mirea, M., Montesano, S., Musumarra, A., Nolte, R., Palomo Pinto, R., Paradela, C., Patronis, N., Pavlik, A., Perkowski, J., Porras, I., Praena, J., Quesada, J.M., Rauscher, T., Reifarth, R., Riego-Perez, A., Robles, M.S., Rubbia, C., Ryan, J., Saxena, A., Schillebeeckx, P., Schmidt, S., Schumann, D., Sedyshev, P., Smith, G., Stamatopoulos, A., Steinegger, P., Suryanarayana, S.V., Tagliente, G., Tain, J.L., Tarifeño-Saldivia, A., Tassan-Got, L., Valenta, S., Vannini, G., Variale, V., Vaz, P., Ventura, A., Vlastou, R., Wallner, A., Warren, S., Weigand, M., Wright, T., Žugec, P., and Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Astrofísica, Nuclear and High Energy Physics, n-TOF facility, Astrophysics::High Energy Astrophysical Phenomena, Monte Carlo method, Montecarlo, Mètode de, Física::Física de partícules [Àrees temàtiques de la UPC], [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Astrophysics, 01 natural sciences, law.invention, Nuclear physics, FLUKA, law, Neutron flux, 0103 physical sciences, Neutron, Beam dump, 010306 general physics, Nuclear Experiment, Instrumentation, Physics, Energies::Energia nuclear [Àrees temàtiques de la UPC], Neutrons, Large Hadron Collider, Neutron cross-section measurement, Neutron time-of-flight, 010308 nuclear & particles physics, Collimator, Neutron radiation, Accelerators and Storage Rings, NATURAL SCIENCES. Physics, n_TOF facility, PRIRODNE ZNANOSTI. Fizika, Beamline, Physics::Accelerator Physics, neutron time-of-flight, neutron cross-section measurement
Abstract

At the neutron time-of-flight facility n_TOF at CERN a new vertical beam line was constructed in 2014, in order to extend the experimental possibilities at this facility to an even wider range of challenging cross-section measurements of interest in astrophysics, nuclear technology and medical physics. The design of the beam line and the experimental hall was based on FLUKA Monte Carlo simulations, aiming at maximizing the neutron flux, reducing the beam halo and minimizing the background from neutrons interacting with the collimator or back-scattered in the beam dump. The present paper gives an overview on the design of the beam line and the relevant elements and provides an outlook on the expected performance regarding the neutron beam intensity, shape and energy resolution, as well as the neutron and photon backgrounds., Engineering & Physical Sciences Research Council (EPSRC) EP/I003258/1, Science & Technology Facilities Council (STFC) ST/L005794/1 ST/J000159/1

48. High accuracy 234U(n,f) cross section in the resonance energy region

Author

A. R. García, A. Mallick, G. Vannini, N. Kivel, E. Chiaveri, D. Cano-Ott, M. A. Cortés-Giraldo, M. Brugger, Gilles Noguere, M. Weigand, F. Belloni, C. Lampoudis, A. Pavlik, P. Gurusamy, C. Domingo-Pardo, Rene Reifarth, Vittorio Boccone, J. M. Quesada, L. Tassan-Got, A. Hernández-Prieto, G. Cortes, I. F. Gonçalves, A. Riego, Alfredo Ferrari, D. Tarrío, E. Leal-Cidoncha, C. Eleftheriadis, T. Wright, M. Kokkoris, Thomas Rauscher, F. Cerutti, M. Meaze, M. J. Vermeulen, A. Manousos, P. Vaz, D. Karadimos, D. G. Jenkins, Srinivasan Ganesan, P. Schillebeeckx, Alberto Ventura, S. Altstadt, C. Le Naour, R. Vlastou, E. González-Romero, M. P. W. Chin, G. Tagliente, Luiz Leal, M. B. Gómez-Hornillos, Christoph Langer, M. Sabaté-Gilarte, V. Bécares, Alberto Mengoni, J. Billowes, Damir Bosnar, Mario Barbagallo, D. Schumann, Y. Kadi, E. Jericha, W. Mondelaers, F. Käppeler, F. Roman, Javier Praena, E. Mendoza, I. Duran, S. Valenta, M. S. Robles, Marco Calviani, K. Fraval, V. Variale, C. Lederer, Roberto Versaci, M. Diakaki, M. Mastromarco, C. Weiß, F. Bečvář, A. Saxena, M. Krtička, C. Carrapiço, Anton Wallner, Jeri Kroll, R. Dressler, J. L. Tain, R. Sarmento, S. Schmidt, T. Martinez, T. Ware, E. Griesmayer, A. J. M. Plompen, J. Marganiec, Petar Žugec, P. F. Mastinu, E. Berthoumieux, L. Audouin, Carlos Guerrero, C. Paradela, M. Mirea, A. Tsinganis, Nicola Colonna, L.S. Leong, R. Losito, F. Mingrone, J. Andrzejewski, Carlo Rubbia, V. Vlachoudis, P. M. Milazzo, G. Giubrone, F. Gunsing, Cristian Massimi, F. Calviño, H. Leeb, J. Perkowski, Universitat Politècnica de Catalunya. Departament de Física, Universitat Politècnica de Catalunya. ANT - Advanced Nuclear Technologies Research Group, Leal-Cidoncha, E., Durán, I., Paradela, C., Tassan-Got, L., Audouin, L., Leal, L.C., Naour, C. Le, Noguere, G., Tarrío, D., Leong, L.S., Altstadt, S., Andrzejewski, J., Barbagallo, M., Bécares, V., Bečvář, F., Belloni, F., Berthoumieux, E., Billowes, J., Boccone, V., Bosnar, D., Brugger, M., Calviani, M., Calviño, F., Cano-Ott, D., Carrapiço, C., Cerutti, F., Chiaveri, E., Chin, M., Colonna, N., Cortés, G., Cortés-Giraldo, M.A., Diakaki, M., Domingo-Pardo, C., Dressler, R., Eleftheriadis, C., Ferrari, A., Fraval, K., Ganesan, S., García, A.R., Giubrone, G., Gómez-Hornillos, M.B., Gonçalves, I.F., González-Romero, E., Griesmayer, E., Guerrero, C., Gunsing, F., Gurusamy, P., Hernández-Prieto, A., Jenkins, D.G., Jericha, E., Kadi, Y., Käppeler, F., Karadimos, D., Kivel, N., Kokkoris, M., Krtička, M., Kroll, J., Lampoudis, C., Langer, C., Lederer, C., Leeb, H., Losito, R., Mallick, A., Manousos, A., Marganiec, J., Martínez, T., Massimi, C., Mastinu, P.F., Mastromarco, M., Meaze, M., Mendoza, E., Mengoni, A., Milazzo, P.M., Mingrone, F., Mirea, M., Mondelaers, W., Pavlik, A., Perkowski, J., Plompen, A., Praena, J., Quesada, J.M., Rauscher, T., Reifarth, R., Riego, A., Robles, M.S., Roman, F., Rubbia, C., Sabaté-Gilarte, M., Sarmento, R., Saxena, A., Schillebeeckx, P., Schmidt, S., Schumann, D., Tagliente, G., Tain, J.L., Tsinganis, A., Valenta, S., Vannini, G., Variale, V., Vaz, P., Ventura, A., Versaci, R., Vermeulen, M.J., Vlachoudis, V., Vlastou, R., Wallner, A., Ware, T., Weigand, M., Weiß, C., Wright, T., Ugec, P., Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear, Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Institut de Radioprotection et de Sûreté Nucléaire (IRSN), CEA Cadarache, Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, n_TOF, Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Nucléaire d'Orsay ( IPNO ), Université Paris-Sud - Paris 11 ( UP11 ) -Institut National de Physique Nucléaire et de Physique des Particules du CNRS ( IN2P3 ) -Centre National de la Recherche Scientifique ( CNRS ), Institut de Radioprotection et de Sûreté Nucléaire ( IRSN ), Commissariat à l'énergie atomique et aux énergies alternatives ( CEA ), Institut de Recherches sur les lois Fondamentales de l'Univers ( IRFU ), and Commissariat à l'énergie atomique et aux énergies alternatives ( CEA ) -Université Paris-Saclay

Subjects
Nuclear reaction, Fission, nTOF, QC1-999, Analytical chemistry, Neutron, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, Resonance (particle physics), Fissió nuclear, Subatomär fysik, Cross section (physics), Physics and Astronomy (all), Nuclear magnetic resonance, Neutron flux, Subatomic Physics, 0103 physical sciences, CERN, ddc:530, Nuclear Physics - Experiment, [ PHYS.NEXP ] Physics [physics]/Nuclear Experiment [nucl-ex], 010306 general physics, Energies::Energia nuclear [Àrees temàtiques de la UPC], Neutrons, Física [Àrees temàtiques de la UPC], Cross section, 010308 nuclear & particles physics, Chemistry, Physics, Nuclear fission, 13. Climate action, Energy (signal processing)
Abstract

New results are presented of the 234U neutron-induced fission cross section, obtained with high accuracy in the resonance region by means of two methods using the 235U(n,f) as reference. The recent evaluation of the 235U(n,f) obtained with SAMMY by L. C. Leal et al. (these Proceedings), based on previous n-TOF data [1], has been used to calculate the 234U(n,f) cross section through the 234U/235U ratio, being here compared with the results obtained by using the n-TOF neutron flux. © The Authors, published by EDP Sciences, 2017.

49. Fission fragment angular distribution measurements of U-235 and U-238 at CERN n_TOF facility

Author

F. Gunsing, Cristian Massimi, A. R. García, D. Bosnar, Srinivasan Ganesan, G. Cortes, M. Brugger, Mario Barbagallo, M. B. Gómez-Hornillos, Christoph Langer, Carlos Guerrero, M. S. Robles, A. Ventura, J. L. Tain, G. Giubrone, M. P. W. Chin, D. G. Jenkins, I. F. Gonçalves, D. Cano-Ott, P. Gurusamy, P. E. Koehler, M. Diakaki, F. Roman, Javier Praena, S. Lo Meo, Rene Reifarth, J. Marganiec, C. Lampoudis, F. Mingrone, A. Pavlik, J. Andrzejewski, Stefan Schmidt, C. Domingo-Pardo, C. Paradela, A. Manousos, M. A. Cortés-Giraldo, Niko Kivel, E. Jericha, Y. Kadi, L. Audouin, G. Tagliente, Dorothea Schumann, E. Chiaveri, Vittorio Boccone, P. F. Mastinu, E. Leal-Cidoncha, J. M. Quesada, C. Eleftheriadis, A. Mallick, G. Vannini, L. Tassan-Got, P. M. Milazzo, S. Valenta, Thomas Rauscher, I. Duran, C. Weiß, Marco Calviani, D. Karadimos, W. Mondelaers, A. Hernández-Prieto, P. Vaz, E. González-Romero, T. Ware, F. Cerutti, V. Variale, E. Griesmayer, M. Krtička, F. Calviño, Roberto Versaci, Alberto Mengoni, Diego Tarrio, T. Martinez, M. J. Vermeulen, F. Käppeler, C. Rubbia, M. Sabaté-Gilarte, Petar Žugec, M. Meaze, R. Vlastou, E. Berthoumieux, T. J. Wright, M. Kokkoris, M. Mastromarco, C. Carrapiço, Anton Wallner, A. K. Saxena, Arnaud Ferrari, J. Billowes, Rugard Dressler, K. Fraval, A. Tsinganis, Nicola Colonna, L.S. Leong, Vasilis Vlachoudis, Roberto Losito, V. Bécares, F. Bečvář, E. Mendoza, A. Riego, Peter Schillebeeckx, N. Dzysiuk, C. Lederer, S. Altstadt, A. J. M. Plompen, Jeri Kroll, R. Sarmento, M. Mirea, H. Leeb, J. Perkowski, Mario Weigand, F. Belloni, Universitat Politècnica de Catalunya. Departament de Física, Universitat Politècnica de Catalunya. ANT - Advanced Nuclear Technologies Research Group, Ventura, A., Mengoni, A., Lo Meo, S., Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear, Serot, O., Leal-Cidoncha, E., Durán, I., Paradela, C., Tarrío, D., Leong, L.S., Tassan-Got, L., Audouin, L., Altstadt, S., Andrzejewski, J., Barbagallo, M., Bécares, V., Bečvář, F., Belloni, F., Berthoumieux, E., Billowes, J., Boccone, V., Bosnar, D., Brugger, M., Calviani, M., Calviño, F., Cano-Ott, D., Carrapiço, C., Cerutti, F., Chiaveri, E., Chin, M., Colonna, N., Cortés, G., Cortés-Giraldo, M.A., Diakaki, M., Domingo-Pardo, C., Dressler, R., Dzysiuk, N., Eleftheriadis, C., Ferrari, A., Fraval, K., Ganesan, S., García, A.R., Giubrone, G., Gómez-Hornillos, M.B., Gonçalves, I.F., González-Romero, E., Griesmayer, E., Guerrero, C., Gunsing, F., Gurusamy, P., Hernández-Prieto, A., Jenkins, D.G., Jericha, E., Kadi, Y., Käppeler, F., Karadimos, D., Kivel, N., Koehler, P., Kokkoris, M., Krtička, M., Kroll, J., Lampoudis, C., Langer, C., Lederer, C., Leeb, H., Losito, R., Mallick, A., Manousos, A., Marganiec, J., Martínez, T., Massimi, C., Mastinu, P.F., Mastromarco, M., Meaze, M., Mendoza, E., Milazzo, P.M., Mingrone, F., Mirea, M., Mondelaers, W., Pavlik, A., Perkowski, J., Plompen, A., Praena, J., Quesada, J.M., Rauscher, T., Reifarth, R., Riego, A., Robles, M.S., Roman, F., Rubbia, C., Sabaté-Gilarte, M., Sarmento, R., Saxena, A., Schillebeeckx, P., Schmidt, S., Schumann, D., Tagliente, G., Tain, J.L., Tsinganis, A., Valenta, S., Vannini, G., Variale, V., Vaz, P., Versaci, R., Vermeulen, M.J., Vlachoudis, V., Vlastou, R., Wallner, A., Ware, T., Weigand, M., Weiß, C., Wright, T., and Žugec, P.

Subjects
neutron, fission, Fission, nTOF, Computer science, QC1-999, Nuclear Theory, Mechanical engineering, Neutron, 01 natural sciences, Fissió nuclear, Subatomär fysik, Nuclear physics, Cross section (physics), Subatomic Physics, 0103 physical sciences, CERN, ddc:530, 010306 general physics, Nuclear Experiment, Energies::Energia nuclear [Àrees temàtiques de la UPC], Neutrons, Range (particle radiation), Large Hadron Collider, Cross section, 010308 nuclear & particles physics, Physics, Fission fragments, Nuclear fission, Observable, Excited state
Abstract

Neutron-induced fission cross sections of 238U and 235U are used as standards in the fast neutron region up to 200 MeV. A high accuracy of the standards is relevant to experimentally determine other neutron reaction cross sections. Therefore, the detection effciency should be corrected by using the angular distribution of the fission fragments (FFAD), which are barely known above 20 MeV. In addition, the angular distribution of the fragments produced in the fission of highly excited and deformed nuclei is an important observable to investigate the nuclear fission process. In order to measure the FFAD of neutron-induced reactions, a fission detection setup based on parallel-plate avalanche counters (PPACs) has been developed and successfully used at the CERN-n-TOF facility. In this work, we present the preliminary results on the analysis of new 235U(n,f) and 238U(n,f) data in the extended energy range up to 200 MeV compared to the existing experimental data. © Owned by the authors, published by EDP Sciences, 2016.

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