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163 results on '"Riego-Perez A."'

1. High precision measurement of the radiative capture cross section of 238U at the n_TOF CERN facility

Author

Mingrone F., Altstadt S., Andrzejewski J., Audouin L., Bécares V., Barbagallo M., Bečvář F., Belloni F., Berthoumieux E., Billowes J., Boccone V., Bosnar D., Brugger M., Calviño 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., Durán I., Eleftheriadis C., Ferrari A., Fraval K., Furman V., Göbel K., Gómez-Hornillos M.B., Ganesan S., García A.R., Giubrone G., Gonçalves I.F., González E., Goverdovski A., Griesmayer E., Guerrero C., Gunsing F., Heftrich T., Hernández-Prieto A., Heyse J., Jenkins D.G., Jericha E., Käppeler F., Kadi Y., Karadimos D., Katabuchi T., Ketlerov V., Khryachkov V., Kivel N., Koehler P., Kokkoris M., Kroll J., Krtička M., Lampoudis C., Langer C., Leal-Cidoncha E., Lederer C., Leeb H., Leong L.S., Lerendegui-Marco J., Losito R., Mallick A., Manousos A., Marganiec J., Martínez T., Massimi C., Mastinu P., Mastromarco M., Mendoza E., Mengoni A., Milazzo P.M., Mirea M., Mondelaers W., Paradela C., Pavlik A., Perkowski J., Plompen A.J.M., Praena J., Quesada J.M., Rauscher T., Reifarth R., Riego-Perez A., Robles M., Rubbia C., Ryan J.A., Sabaté-Gilarte M., Sarmento R., Saxena A., Schillebeeckx P., Schmidt S., Schumann D., Sedyshev P., Tagliente G., Tain J.L., Tarifeño-Saldivia A., 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 importance of improving the accuracy on the capture cross-section of 238U has been addressed by the Nuclear Energy Agency, since its uncertainty significantly affects the uncertainties of key design parameters for both fast and thermal nuclear reactors. Within the 7th framework programme ANDES of the European Commission three different measurements have been carried out with the aim of providing the 238U(n,γ) cross-section with an accuracy which varies from 1 to 5%, depending on the energy range. Hereby the final results of the measurement performed at the n_TOF CERN facility in a wide energy range from 1 eV to 700 keV will be presented.

Published
2017
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2. The measurement programme at the neutron time-of-flight facility n_TOF at CERN

Author

Gunsing F., Aberle O., Andrzejewski J., Audouin L., Bécares V., Bacak M., Balibrea-Correa J., Barbagallo M., Barros S., Bečvář F., Beinrucker C., Belloni F., Berthoumieux E., Billowes J., Bosnar D., Brown A., Brugger M., Caamaño M., Calviño F., Calviani M., Cano-Ott D., Cardella R., Casanovas A., Castelluccio D.M., Cerutti F., Chen Y.H., Chiaveri E., Colonna N., Cortés-Giraldo M.A., Cortés G., Cosentino L., Damone L.A., Deo K., Diakaki M., Domingo-Pardo C., Dressler R., Dupont E., Durán I., Fernández-Domínguez B., Ferrari A., Ferreira P., Finocchiaro P., Frost R.J.W., Furman V., Ganesan S., García A.R., Gawlik A., Gheorghe I., Gilardoni S., Glodariu T., Gonçalves I.F., González E., Goverdovski A., Griesmayer E., Guerrero C., Göbel K., Harada H., Heftrich T., Heinitz S., Hernández-Prieto A., Heyse J., Jenkins D.G., Jericha E., Käppeler F., Kadi Y., Kalamara A., Katabuchi T., Kavrigin P., Ketlerov V., Khryachkov V., Kimura A., Kivel N., Kokkoris M., Krtička M., Kurtulgil D., Leal-Cidoncha E., Lederer C., Leeb H., Lerendegui J., Licata M., Meo S. Lo, Lonsdale S.J., Losito R., Macina D., Marganiec J., Martínez T., Masi A., Massimi C., Mastinu P., Mastromarco M., Matteucci F., Maugeri E.A., Mazzone A., Mendoza E., Mengoni A., Milazzo P.M., Mingrone F., Mirea M., Montesano S., Musumarra A., Nolte R., Negret A., Oprea A., Palomo-Pinto F.R., Paradela C., Patronis N., Pavlik A., Perkowski J., Porras I., Praena J., Quesada J.M., Radeck D., Rajeev K., Rauscher T., Reifarth R., Riego-Perez A., Robles M., Rout P., Rubbia C., Ryan J.A., Sabaté-Gilarte M., Saxena A., Schillebeeckx P., Schmidt S., Schumann D., Sedyshev P., Smith A.G., Sosnin N.V., Stamatopoulos A., Suryanarayana S.V., Tagliente G., Tain J.L., Tarifeño-Saldivia A., Tarrío D., Tassan-Got L., Tsinganis A., Valenta S., Vannini G., Variale V., Vaz P., Ventura A., Vlachoudis V., Vlastou R., Wallner A., Warren S., Weigand M., Weiss C., Wolf C., Woods P.J., Wright T., and Žugec P.

Subjects
Physics, QC1-999
Abstract

Neutron-induced reaction cross sections are important for a wide variety of research fields ranging from the study of nuclear level densities, nucleosynthesis to applications of nuclear technology like design, and criticality and safety assessment of existing and future nuclear reactors, radiation dosimetry, medical applications, nuclear waste transmutation, accelerator-driven systems and fuel cycle investigations. Simulations and calculations of nuclear technology applications largely rely on evaluated nuclear data libraries. The evaluations in these libraries are based both on experimental data and theoretical models. CERN’s neutron time-of-flight facility n_TOF has produced a considerable amount of experimental data since it has become fully operational with the start of its scientific measurement programme in 2001. While for a long period a single measurement station (EAR1) located at 185 m from the neutron production target was available, the construction of a second beam line at 20 m (EAR2) in 2014 has substantially increased the measurement capabilities of the facility. An outline of the experimental nuclear data activities at n_TOF will be presented.

Published
2017
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3. 7Be(n,α) and 7Be(n,p) cross-section measurement for the cosmological lithium problem at the n_TOF facility at CERN

Author

Barbagallo M., Colonna N., Aberle O., Andrzejewski J., Audouin L., Bécares V., Bacak M., Balibrea J., Barros S., Bečvář F., Beinrucker C., Berthoumieux E., Billowes J., Bosnar D., Brugger M., Caamaño M., Calviño F., Calviani M., Cano-Ott D., Cardella R., Casanovas A., Castelluccio D.M., Cerutti F., Chen Y.H., Chiaveri E., Cortés G., Cortés-Giraldo M.A., Cosentino L., Damone L.A., Diakaki M., Domingo-Pardo C., Dressler R., Dupont E., Durán I., Fernández-Domínguez B., Ferrari A., Ferreira P., Finocchiaro P., Furman V., Göbel K., García A.R., Gawlik A., Glodariu T., Gonçalves I.F., González E., Goverdovski A., Griesmayer E., Guerrero C., Gunsing F., Harada H., Heftrich T., Heinitz S., Heyse J., Jenkins D.G., Jericha E., Käppeler F., Kadi Y., Katabuchi T., Kavrigin P., Ketlerov V., Khryachkov V., Kimura A., Kivel N., Kokkoris M., Krtička M., Leal-Cidoncha E., Lederer C., Leeb H., Lerendegui-Marco J., Meo S. Lo, Lonsdale S.J., Losito R., Macina D., Marganiec J., Martínez T., Massimi C., Mastinu P., Mastromarco M., Matteucci F., Maugeri E.A., Mendoza E., Mengoni A., Milazzo P.M., Mingrone F., Mirea M., Montesano S., Musumarra A., Nolte R., Oprea A., Patronis N., Pavlik A., Perkowski J., Porras J.I., Praena J., Quesada J.M., Rajeev K., Rauscher T., Reifarth R., Riego-Perez A., Rout P.C., Rubbia C., Ryan J.A., Sabaté-Gilarte M., Saxena A., Schillebeeckx P., Schmidt S., Schumann D., Sedyshev P., Smith A.G., Stamatopoulos A., Tagliente G., Tain J.L., Tarifeño-Saldivia A., Tassan-Got L., Tsinganis A., Valenta S., Vannini G., Variale V., Vaz P., Ventura A., Vlachoudis V., Vlastou R., Wallner A., Warren S., Weigand M., Weiss C., Wolf C., Woods P.J., Wright T., and Žugec P.

Subjects
Physics, QC1-999
Abstract

The Cosmological Lithium Problem refers to the large discrepancy between the abundance of primordial 7Li predicted by the standard theory of Big Bang Nucleosynthesis and the value inferred from the so-called “Spite plateau” in halo stars. A possible explanation for this longstanding puzzle in Nuclear Astrophysics is related to the incorrect estimation of the destruction rate of 7Be, which is responsible for the production of 95% of primordial Lithium. While charged-particle induced reactions have mostly been ruled out, data on the 7Be(n,α) and 7Be(n,p) reactions are scarce or completely missing, so that a large uncertainty still affects the abundance of 7Li predicted by the standard theory of Big Bang Nucleosynthesis. Both reactions have been measured at the n_TOF facility at CERN, providing for the first time data in a wide neutron energy range.

Published
2017
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4. The 33S(n,α)30Si cross section measurement at n_TOF-EAR2 (CERN): From 0.01 eV to the resonance region

Author

Sabaté-Gilarte M., Praena J., Porras I., Quesada J.M., Aberle O., Andrzejewski J., Audouin L., Bécares V., Bacak M., Balibrea-Correa J., Barbagallo M., Barros S., Bečvář F., Beinrucker C., Berthoumieux E., Billowes J., Bosnar D., Brugger M., Camaño M., Calviño F., Calviani M., Cano-Ott D., Cardella R., Casanovas A., Castelluccio D.M., Cerutti F., Chen Y.H., Chiaveri E., Colonna N., Cortés G., Cortés-Giraldo M.A., Cosentino L., Damone L.A., Diakaki M., Domingo-Pardo C., Dressler R., Dupont E., Durán I., Fernández-Domínguez B., Ferrari A., Ferreira P., Finocchiaro P., Furman V., Gödel K., García-Rios A., Gawlik A., Glodariu T., Gonçalves I.F., González E., Goverdovski A., Griesmayer E., Guerrero C., Gunsing F., Harada H., Heftrich T., Heinitz S., Heyse J., Jenkins D.G., Jericha E., Käppeler F., Kadi Y., Katabuchi T., Kavrigin P., Ketlerov V., Khryachkov V., Kimura A., Kivel N., Kokkoris M., Krtička M., Leal-Cidoncha E., Lederer C., Leeb H., Lerendegui-Marco J., Meo S. Lo, Lonsdale S.J., Losito R., Macina D., Marganiec J., Martínez T., Massimi C., Mastinu P., Mastromarco M., Matteucci F., Maugeri E.A., Mendoza E., Mengoni A., Milazzo P.M., Mingrone F., Mirea M., Montesano S., Musumarra A., Nolte R., Oprea A., Patronis N., Pavlik A., Perkowski J., Rajeev K., Rauscher T., Reifarth R., Riego-Perez A., Rout P., Rubbia C., Ryan J.A., Saxena A., Schillebeeckx P., Schmidt S., Schumann D., Sedyshev P., Smith A.G., Stamatopoulos A., Tagliente G., Tain J.L., Tarifeño-Saldivia A., Tassan-Got L., Tsinganis A., Valenta S., Vannini G., Variale V., Vaz P., Ventura A., Vlachoudis V., Vlastou R., Wallner A., Warren S., Weigand M., Weiss C., Wolf C., Woods P.J., Wright T., and Žugec P.

Subjects
Physics, QC1-999
Abstract

The 33S(n,α)30Si cross section measurement, using 10B(n,α) as reference, at the n_TOF Experimental Area 2 (EAR2) facility at CERN is presented. Data from 0.01 eV to 100 keV are provided and, for the first time, the cross section is measured in the range from 0.01 eV to 10 keV. These data may be used for a future evaluation of the cross section because present evaluations exhibit large discrepancies. The 33S(n,α)30Si reaction is of interest in medical physics because of its possible use as a cooperative target to boron in Neutron Capture Therapy (NCT).

Published
2017
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5. Measurement of the 240Pu(n,f) cross-section at the CERN n_TOF facility: First results from experimental area II (EAR-2)

Author

Stamatopoulos A., Tsinganis A., Colonna N., Vlastou R., Kokkoris M., Schillebeeckx P., Plompen A., Heyse J., Žugec P., Barbagallo M., Calviani M., Berthoumieux E., Chiaveri E., Aberle O., Andrzejewski J., Audouin L., Bécares V., Bacak M., Balibrea J., Barros S., Bečvář F., Beinrucker C., Belloni F., Billowes J., Boccone V., Bosnar D., Brugger M., Caamaño M., Calviño F., Cano-Ott D., Cerutti F., Cortés G., Cortés-Giraldo M.A., Cosentino L., Damone L.A., Deo K., Diakaki M., Domingo-Pardo C., Dressler R., Dupont E., Durán I., Fernández-Domínguez B., Ferrari A., Ferreira P., Finocchiaro P., Frost R.J.W., Furman V., Göbel K., Gómez-Hornillos M.B., García A.R., Gheorghe I., Glodariu T., Gonçalves I.F., González E., Goverdovski A., Griesmayer E., Guerrero C., Gunsing F., Harada H., Heftrich T., Heinitz S., Hernández-Prieto A., Jenkins D.G., Jericha E., Käppeler F., Kadi Y., Katabuchi T., Kavrigin P., Ketlerov V., Khryachkov V., Kimura A., Kivel N., Krtička M., Leal-Cidoncha E., Lederer C., Leeb H., Lerendegui-Marco J., Licata M., Meo S. Lo, Losito R., Macina D., Marganiec J., Martínez T., Massimi C., Mastinu P., Mastromarco M., Matteucci F., Mendoza E., Mengoni A., Milazzo P.M., Mingrone F., Mirea M., Montesano S., Musumarra A., Nolte R., Palomo-Pinto F.R., Paradela C., Patronis N., Pavlik A., Perkowski J., Porras J.I., Praena J., Quesada J.M., Rauscher T., Reifarth R., Riego-Perez A., Robles M., Rubbia C., Ryan J.A., Sabaté-Gilarte M., Saxena A., Schmidt S., Schumann D., Sedyshev P., Smith A.G., Suryanarayana S.V., Tagliente G., Tain J.L., Tarifeño-Saldivia A., Tassan-Got L., Valenta S., Vannini G., Variale V., Vaz P., Ventura A., Vlachoudis V., Wallner A., Warren S., Weigand M., Weiss C., and Wright T.

Subjects
Physics, QC1-999
Abstract

The accurate knowledge of the neutron-induced fission cross-sections of actinides and other isotopes involved in the nuclear fuel cycle is essential for the design of advanced nuclear systems, such as Generation-IV nuclear reactors. Such experimental data can also provide the necessary feedback for the adjustment of nuclear model parameters used in the evaluation process, resulting in the further development of nuclear fission models. In the present work, the 240Pu(n,f) cross-section was measured at CERN's n_TOF facility relative to the well-known 235U(n,f) cross section, over a wide range of neutron energies, from meV to almost MeV, using the time-of-flight technique and a set-up based on Micromegas detectors. This measurement was the first experiment to be performed at n_TOF's new experimental area (EAR-2), which offers a significantly higher neutron flux compared to the already existing experimental area (EAR-1). Preliminary results as well as the experimental procedure, including a description of the facility and the data handling and analysis, are presented.

Published
2017
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6. Characterization of the n_TOF EAR-2 neutron beam

Author

Chen Y.H., Tassan-Got L., Audouin L., Le Naour C., Durán I., Casarejos E., Aberle O., Andrzejewski J., Bécares V., Bacak M., Balibrea J., Barbagallo M., Barros S., Bečvář F., Beinrucker C., Berthoumieux E., Billowes J., Bosnar D., Brugger M., Caamaño M., Calviño F., Calviani M., Cano-Ott D., Cardella R., Casanovas A., Castelluccio D.M., Cerutti F., Chiaveri E., Colonna N., Cortés G., Cortés-Giraldo M.A., Cosentino L., Damone L.A., Diakaki M., Domingo-Pardo C., Dressler R., Dupont E., Fernández-Domínguez B., Ferrari A., Ferreira P., Finocchiaro P., Furman V., Göbel K., Gómez-Hornillos M.B., García A.R., Gawlik A., Glodariu T., Gonçalves I.F., González E., Goverdovski A., Griesmayer E., Guerrero C., Gunsing F., Harada H., Heftrich T., Heinitz S., Heyse J., Jenkins D.G., Jericha E., Käppeler F., Kadi Y., Katabuchi T., Kavrigin P., Ketlerov V., Khryachkov V., Kimura A., Kivel N., Kokkoris M., Krtička M., Leal-Cidoncha E., Lederer C., Leeb H., Lerendegui-Marco J., Meo S. Lo, Lonsdale S.J., Losito R., Macina D., Marganiec J., Martínez T., Massimi C., Mastinu P., Mastromarco M., Matteucci F., Maugeri E.A., Mendoza E., Mengoni A., Milazzo P.M., Mingrone F., Mirea M., Montesano S., Musumarra A., Nolte R., Oprea A., Patronis N., Pavlik A., Perkowski J., Porras J.I., Praena J., Quesada J.M., Rajeev K., Rauscher T., Reifarth R., Riego-Perez A., Robles M., Rout P.C., Rubbia C., Ryan J.A., Sabaté-Gilarte M., Saxena A., Schillebeeckx P., Schmidt S., Schumann D., Sedyshev P., Smith A.G., Stamatopoulos A., Tagliente G., Tain J.L., Tarifeño-Saldivia A., Tsinganis A., Valenta S., Vannini G., Variale V., Vaz P., Ventura A., Vlachoudis V., Vlastou R., Wallner A., Warren S., Weigand M., Weiss C., Wolf C., Woods P.J., Wright T., and Žugec P.

Subjects
Physics, QC1-999
Abstract

The experimental area 2 (EAR-2) at CERNs neutron time-of-flight facility (n_TOF), which is operational since 2014, is designed and built as a short-distance complement to the experimental area 1 (EAR-1). The Parallel Plate Avalanche Counter (PPAC) monitor experiment was performed to characterize the beam pro↓le and the shape of the neutron 'ux at EAR-2. The prompt γ-flash which is used for calibrating the time-of-flight at EAR-1 is not seen by PPAC at EAR-2, shedding light on the physical origin of this γ-flash.

Published
2017
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7. Measurement of the neutron capture cross section of the fissile isotope 235U with the CERN n_TOF total absorption calorimeter and a fission tagging based on micromegas detectors

Author

Balibrea-Correa J., Mendoza E., Cano-Ott D., Krtička M., Altstadt S., Andrzejewski J., Audouin L., Bécares V., Barbagallo M., Bečvář F., Belloni F., Berthoumieux E., Billowes J., Boccone V., Bosnar D., Brugger M., Calviño F., Calviani M., Carrapiço C., Cerutti F., Chiaveri E., Chin M., Colonna N., Cortés G., Cortés-Giraldo M.A., Diakaki M., Domingo-Pardo C., Dressler R., Durán I., Eleftheriadis C., Ferrari A., Fraval K., Furman V., Göbel K., Guerrero C., Gómez-Hornillos M.B., Ganesan S., García A.R., Giubrone G., Gonçalves I.F., González E., Goverdovski A., Griesmayer E., Gunsing F., Heftrich T., Heinitz S., Hernández-Prieto A., Heyse J., Jenkins D.G., Jericha E., Käppeler F., Kadi Y., Karadimos D., Katabuchi T., Ketlerov V., Khryachkov V., Kivel N., Koehler P., Kokkoris M., Kroll J., Lampoudis C., Langer C., Leal-Cidoncha E., Lederer C., Leeb H., Leong L.S., Lerendegui-Marco J., Licata M., Losito R., Mallick A., Manousos A., Marganiec J., Martínez T., Massimi C., Mastinu P., Mastromarco M., Mengoni A., Milazzo P.M., Mingrone F., Mirea M., Mondelaers W., Paradela C., Pavlik A., Perkowski J., Plompen A.J.M., Praena J., Quesada J.M., Rauscher T., Reifarth R., Riego-Perez A., Robles M., Rubbia C., Ryan J.A., Sabaté-Gilarte M., Sarmento R., Saxena A., Schillebeeckx P., Schmidt S., Schumann D., Sedyshev P., Tagliente G., Tain J.L., Tarifeño-Saldivia A., 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 accuracy on neutron capture cross section of fissile isotopes must be improved for the design of future nuclear systems such as Gen-IV reactors and Accelerator Driven Systems. The High Priority Request List of the Nuclear Energy Agency, which lists the most important nuclear data requirements, includes also the neutron capture cross sections of fissile isotopes such as 233,235U and 239,241Pu. A specific experimental setup has been used at the CERN n_TOF facility for the measurement of the neutron capture cross section of 235U by a set of micromegas fission detectors placed inside a segmented BaF2 Total Absorption Calorimeter.

Published
2017
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8. Measurement of the 241Am neutron capture cross section at the n_TOF facility at CERN

Author

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

Subjects
Physics, QC1-999
Abstract

New neutron cross section measurements of minor actinides have been performed recently in order to reduce the uncertainties in the evaluated data, which is important for the design of advanced nuclear reactors and, in particular, for determining their performance in the transmutation of nuclear waste. We have measured the 241Am(n,γ) cross section at the n_TOF facility between 0.2 eV and 10 keV with a BaF2 Total Absorption Calorimeter, and the analysis of the measurement has been recently concluded. Our results are in reasonable agreement below 20 eV with the ones published by C. Lampoudis et al. in 2013, who reported a 22% larger capture cross section up to 110 eV compared to experimental and evaluated data published before. Our results also indicate that the 241Am(n,γ) cross section is underestimated in the present evaluated libraries between 20 eV and 2 keV by 25%, on average, and up to 35% for certain evaluations and energy ranges.

Published
2017
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9. The 236U neutron capture cross-section measured at the n_TOF CERN facility

Author

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

Subjects
Physics, QC1-999
Abstract

The 236U isotope plays an important role in nuclear systems, both for future and currently operating ones. The actual knowledge of the capture reaction of this isotope is satisfactory in the thermal region, but it is considered insufficient for Fast Reactor and ADS applications. For this reason the 236U(n, γ) reaction cross-section has been measured for the first time in the whole energy region from thermal energy up to 1 MeV at the n_TOF facility with two different detection systems: an array of C6D6 detectors, employing the total energy deposited method, and a FX1 total absorption calorimeter (TAC), made of 40 BaF2 crystals. The two n_TOF data sets agree with each other within the statistical uncertainty in the Resolved Resonance Region up to 800 eV, while sizable differences (up to ≃ 20%) are found relative to the current evaluated data libraries. Moreover two new resonances have been found in the n_TOF data. In the Unresolved Resonance Region up to 200 keV, the n_TOF results show a reasonable agreement with previous measurements and evaluated data.

Published
2017
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10. The CERN n_TOF facility: a unique tool for nuclear data measurement

Author

Mingrone F., Aberle O., Andrzejewski J., Audouin L., Bécares V., Bacak M., Balibrea-Correa J., Barbagallo M., Barros S., Bečvář F., Beinrucker C., Berthoumieux E., Billowes J., Bosnar D., Brugger M., Caamaño M., Calviño F., Calviani M., Cano-Ott D., Cardella R., Casanovas A., Castelluccio D. M., Cerutti F., Chen Y., Chiaveri E., Colonna N., Cortés-Giraldo M. A., Cortés G., Cosentino L., Damone L., Diakaki M., Domingo-Pardo C., Dressler R., Dupont E., Durán I., Fernández-Domínguez B., Ferrari A., Ferreira P., Finocchiaro P., Furman V., Ganesan S., Garcia-Rios A. A., Gawlik A., Gheorghe I., Glodariu T., Gonçalves I. F., Gonzàlez E., Goverdovski A., Griesmayer E., Guerrero C., Gunsing F., Göbel K., Harada H., Heftrich T., Heinitz S., Heyse J., Jenkins G., Jericha E., Käppeler F., Kadi Y., 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., Lo Meo S., Lonsdale S., Losito R., Macina D., Marganiec J., Martínez T., Massimi C., Mastinu P., Mastromarco M., Matteucci F., Maugeri E. A., Mendoza E., Mengoni A., Milazzo P. M., Mirea M., Montesano S., Musumarra A., Nolte R., Oprea A., Patronis N., Pavlik A., Perkowski J., Praena J., Quesada J. M., Rajeev K., Rauscher T., Reifarth R., Riego-Perez A., Rout P., Rubbia C., Ryan J. A., Sabaté-Gilarte M., Saxena A., Schillebeeckx P., Schmidt S., Schumann D., Sedyshev P., Smith A. G., Stamatopoulos A., Tagliente G., Tain J. L., Tarifeño-Saldivia A., Tassan-Got L., Tsinganis A., Valenta S., Vannini G., Variale V., Vaz P., Ventura A., Vlachoudis V., Vlastou R., Wallner A., Warren S., Weigand M., Weiss C., Wolf C., Woods P. J., Wright T., and Žugec P.

Subjects
Physics, QC1-999
Abstract

The study of the resonant structures in neutron-nucleus cross-sections, and therefore of the compound-nucleus reaction mechanism, requires spectroscopic measurements to determine with high accuracy the energy of the neutron interacting with the material under study. To this purpose, the neutron time-of-flight facility n_TOF has been operating since 2001 at CERN. Its characteristics, such as the high intensity instantaneous neutron flux, the wide energy range from thermal to few GeV, and the very good energy resolution, are perfectly suited to perform high-quality measurements of neutron-induced reaction cross sections. The precise and accurate knowledge of these cross sections plays a fundamental role in nuclear technologies, nuclear astrophysics and nuclear physics. Two different measuring stations are available at the n_TOF facility, called EAR1 and EAR2, with different characteristics of intensity of the neutron flux and energy resolution. These experimental areas, combined with advanced detection systems lead to a great flexibility in performing challenging measurement of high precision and accuracy, and allow the investigation isotopes with very low cross sections, or available only in small quantities, or with very high specific activity. The characteristics and performances of the two experimental areas of the n_TOF facility will be presented, together with the most important measurements performed to date and their physics case. In addition, the significant upcoming measurements will be introduced.

Published
2016
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11. The $^{7}$Be($\boldsymbol{n,p}$)$^{7}$Li reaction and the Cosmological Lithium Problem: measurement of the cross section in a wide energy range at n_TOF (CERN)

Author

Damone, L., Barbagallo, M., Mastromarco, M., Mengoni, A., Cosentino, L., Maugeri, E., Heinitz, S., Schumann, D., Dressler, R., Käppeler, F., Colonna, N., Finocchiaro, P., Andrzejewski, J., Perkowski, J., Gawlik, A., Aberle, O., Altstadt, S., Ayranov, M., Audouin, L., Bacak, M., Balibrea-Correa, J., Ballof, J., Bécares, V., Bečvář, F., Beinrucker, C., Bellia, G., Bernardes, A. P., Berthoumieux, E., Billowes, J., Borge, M. J. G., Bosnar, D., Brown, A., Brugger, M., Busso, M., Caamaño, M., Calviño, F., Calviani, M., Cano-Ott, D., Cardella, R., Casanovas, A., Castelluccio, D. M., Catherall, R., Cerutti, F., Chen, Y. H., Chiaveri, E., Cortés, G., Cortés-Giraldo, M. A., Cristallo, S., Diakaki, M., Dietz, M., Domingo-Pardo, C., Dorsival, A., Dupont, E., Duran, I., Fernandez-Dominguez, B., Ferrari, A., Ferreira, P., Furman, W., Ganesan, S., García-Rio, A., Gilardoni, S., Glodariu, T., Göbel, K., Gonçalves, I. F., González-Romero, E., Goodacre, T. D., Griesmayer, E., Guerrero, C., Gunsing, F., Harada, H., Heftrich, T., Heyse, J., Jenkins, D. G., Jericha, E., Johnston, K., Kadi, Y., Kalamara, A., Katabuchi, T., Kavrigin, P., Kimura, A., Kivel, N., Kohester, U., Kokkoris, M., Krtička, M., Kurtulgil, D., Leal-Cidoncha, E., Lederer-Woods, C., Leeb, H., Lerendegui-Marco, J., Meo, S. Lo, Lonsdale, S. J., Losito, R., Macina, D., Marganiec, J., Marsh, B., Martíne, T., Correia, J. G. Martins, Masi, A., Massimi, C., Mastinu, P., Matteucci, F., Mazzone, A., Mendoza, E., Milazzo, P. M., Mingrone, F., Mirea, M., Musumarra, A., Negret, A., Nolte, R., Oprea, A., Patronis, N., Pavlik, A., Piersanti, L., Piscopo, M., Plompen, A., Porras, I., Praena, J., Quesada, J. M., Radeck, D., Rajeev, K., Rauscher, T., Reifarth, R., Riego-Perez, A., Rothe, S., Rout, P., Rubbia, C., Ryan, J., Sabaté-Gilarte, M., Saxena, A., Schell, J., Schillebeeckx, P., Schmidt, S., Sedyshev, P., Seiffert, C., Smith, A. G., Sosnin, N. V., Stamatopoulos, A., Stora, T., Tagliente, G., Tain, J. L., Tarifeño-Saldivia, A., Tassan-Got, L., Tsinganis, A., Valenta, S., Vannini, G., Variale, V., Vaz, P., Ventura, A., Vlachoudis, V., Vlastou, R., Wallner, A., Warren, S., Weigand, M., Weiß, C., Wolf, C., Woods, P. J., Wright, T., and Žugec, P.

Subjects
Nuclear Experiment
Abstract

We report on the measurement of the $^{7}$Be($n, p$)$^{7}$Li cross section from thermal to approximately 325 keV neutron energy, performed in the high-flux experimental area (EAR2) of the n\_TOF facility at CERN. This reaction plays a key role in the lithium yield of the Big Bang Nucleosynthesis (BBN) for standard cosmology. The only two previous time-of-flight measurements performed on this reaction did not cover the energy window of interest for BBN, and showed a large discrepancy between each other. The measurement was performed with a Si-telescope, and a high-purity sample produced by implantation of a $^{7}$Be ion beam at the ISOLDE facility at CERN. While a significantly higher cross section is found at low-energy, relative to current evaluations, in the region of BBN interest the present results are consistent with the values inferred from the time-reversal $^{7}$Li($p, n$)$^{7}$Be reaction, thus yielding only a relatively minor improvement on the so-called Cosmological Lithium Problem (CLiP). The relevance of these results on the near-threshold neutron production in the p+$^{7}$Li reaction is also discussed.

Published
2018
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12. Corrigendum: 'Measurement of 73Ge(n,γ) cross sections and implications for stellar nucleosynthesis' [Phys. Lett. B 790 (2019) 458–465]

Author

C. Lederer-Woods, U. Battino, P. Ferreira, A. Gawlik, C. Guerrero, F. Gunsing, S. Heinitz, J. Lerendegui-Marco, A. Mengoni, R. Reifarth, A. Tattersall, S. Valenta, C. Weiss, O. Aberle, J. Andrzejewski, L. Audouin, V. Bécares, M. Bacak, J. Balibrea, M. Barbagallo, S. Barros, F. Bečvář, C. Beinrucker, F. Belloni, E. Berthoumieux, J. Billowes, D. Bosnar, M. Brugger, M. Caamaño, F. Calviño, M. Calviani, D. Cano-Ott, F. Cerutti, E. Chiaveri, N. Colonna, G. Cortés, M.A. Cortés-Giraldo, L. Cosentino, L.A. Damone, K. Deo, M. Diakaki, M. Dietz, C. Domingo-Pardo, R. Dressler, E. Dupont, I. Durán, B. Fernández-Domínguez, A. Ferrari, P. Finocchiaro, R.J.W. Frost, V. Furman, K. Göbel, A.R. García, I. Gheorghe, T. Glodariu, I.F. Gonçalves, E. González-Romero, A. Goverdovski, E. Griesmayer, H. Harada, T. Heftrich, A. Hernández-Prieto, J. Heyse, D.G. Jenkins, E. Jericha, F. Käppeler, Y. Kadi, T. Katabuchi, P. Kavrigin, V. Ketlerov, V. Khryachkov, A. Kimura, N. Kivel, I. Knapova, M. Kokkoris, M. Krtička, E. Leal-Cidoncha, H. Leeb, M. Licata, S. Lo Meo, R. Losito, D. Macina, J. Marganiec, T. Martínez, C. Massimi, P. Mastinu, M. Mastromarco, F. Matteucci, E. Mendoza, P.M. Milazzo, F. Mingrone, M. Mirea, S. Montesano, A. Musumarra, R. Nolte, F.R. Palomo-Pinto, C. Paradela, N. Patronis, A. Pavlik, J. Perkowski, J.I. Porras, J. Praena, J.M. Quesada, T. Rauscher, A. Riego-Perez, M. Robles, C. Rubbia, J.A. Ryan, M. Sabaté-Gilarte, A. Saxena, P. Schillebeeckx, S. Schmidt, D. Schumann, P. Sedyshev, A.G. Smith, A. Stamatopoulos, S.V. Suryanarayana, G. Tagliente, J.L. Tain, A. Tarifeño-Saldivia, L. Tassan-Got, A. Tsinganis, G. Vannini, V. Variale, P. Vaz, A. Ventura, V. Vlachoudis, R. Vlastou, A. Wallner, S. Warren, M. Weigand, T. Wright, and P. Žugec

Subjects
Physics, QC1-999
Published
2023
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13. 74n,γGe(74n,γ) cross section below 70 keV measured at n_TOF CERN

Author

Lederer-Woods, C., Aberle, O., Andrzejewski, J., Audouin, L., Bécares, V., Bacak, M., Balibrea, J., Barbagallo, M., Barros, S., Battino, U., Bečvář, F., Beinrucker, C., Berthoumieux, E., Billowes, J., Bosnar, D., Brugger, M., Caamaño, M., Calviño, F., Calviani, M., Cano-Ott, D., Cardella, R., Casanovas, A., Castelluccio, D. M., Cerutti, F., Chen, Y. H., Chiaveri, E., Colonna, N., Cortés, G., Cortés-Giraldo, M. A., Cosentino, L., Damone, L. A., Diakaki, M., Domingo-Pardo, C., Dressler, R., Dupont, E., Durán, I., Fernández-Domínguez, B., Ferrari, A., Ferreira, P., Finocchiaro, P., Furman, V., Göbel, K., García, A. R., Gawlik-Ramięga, A., Glodariu, T., Gonçalves, I. F., González-Romero, E., Goverdovski, A., Griesmayer, E., Guerrero, C., Gunsing, F., Harada, H., Heftrich, T., Heinitz, S., Heyse, J., Jenkins, D. G., Jericha, E., Käppeler, F., Kadi, Y., Katabuchi, T., Kavrigin, P., Ketlerov, V., Khryachkov, V., Kimura, A., Kivel, N., Kokkoris, M., Krtička, M., Leal-Cidoncha, E., Leeb, H., Lerendegui-Marco, J., Meo, S. Lo, Lonsdale, S. J., Losito, R., Macina, D., Marganiec, J., Martínez, T., Massimi, C., Mastinu, P., Mastromarco, M., Matteucci, F., Maugeri, E. A., Mendoza, E., Mengoni, A., Milazzo, P. M., Mingrone, F., Mirea, M., Montesano, S., Musumarra, A., Nolte, R., Oprea, A., Patronis, N., Pavlik, A., Perkowski, J., Porras, I., Praena, J., Quesada, J. M., Rajeev, K., Rauscher, T., Reifarth, R., Riego-Perez, A., Rout, P. C., Rubbia, C., Ryan, J. A., Sabaté-Gilarte, M., Saxena, A., Schillebeeckx, P., Schmidt, S., Schumann, D., Sedyshev, P., Smith, A. G., Stamatopoulos, A., Tagliente, G., Tain, J. L., Tarifeño-Saldivia, A., Tassan-Got, L., Tsinganis, A., Valenta, S., Vannini, G., Variale, V., Vaz, P., Ventura, A., Vlachoudis, V., Vlastou, R., Wallner, A., Warren, S., Weigand, M., Weiss, C., Wolf, C., Woods, P. J., Wright, T., and Žugec, P.

Published
2022
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14. Experimental setup and procedure for the measurement of the 7Be(n,{\alpha}){\alpha} reaction at n_TOF

Author

Cosentino, L., Musumarra, A., Barbagallo, M., Pappalardo, A., Colonna, N., Damone, L., Piscopo, M., Finocchiaro, P., Maugeri, E., Heinitz, S., Schumann, D., Dressler, R., Kivel, N., Aberle, O., Andrzejewski, J., Audouin, L., Ayranov, M., Bacak, M., Barros, S., Balibrea-Correa, J., Beecares, V., Becvar, F., Beinrucker, C., Berthoumieux, E., Billowes, J., Bosnar, D., Brugger, M., Caamano, M., Calviani, M., Calvino, F., Cano-Ott, D., Cardella, R., Casanovas, A., Castelluccio, D. M., Cerutti, F., Chen, Y. H., Chiaveri, E., Cortes, G., Cortes-Giraldo, M. A., Diakaki, M., Domingo-Pardo, C., Dupont, E., Duran, I., Fernandez-Dominguez, B., Ferrari, A., Ferreira, P., Furman, W., Ganesan, S., Garcia-Rios, A., Gawlik, A., Gheorghe, I., Glodariu, T., Goebel, K., Goncalves, I. F., Gonzalez-Romero, E., Griesmayer, E., Guerrero, C., Gunsing, F., Harada, H., Heftrich, T., Heyse, J., Jenkins, D. G., Jericha, E., Kaeppeler, F., Katabuchi, T., Kavrigin, P., Kimura, A., Kokkoris, M., Krticka, M., Leal-Chidonca, E., Lerendegui, J., Lederer, C., Leeb, H., Meo, S. Lo, Lonsdale, S., Losito, R., Macina, D., Marganiec, J., Martinez, T., Massimi, C., Mastinu, P., Mastromarco, M., Matteucci, F., Mazzone, A., Mendoza, E., Mengoni, A., Milazzo, P. M., Mingrone, F., Mirea, M., Montesano, S., Nolte, R., Oprea, A., Patronis, N., Pavlik, A., Perkowski, J., Praena, J., Quesada, J., Rajeev, K., Rauscher, T., Reifarth, R., Riego-Perez, A., Rout, P., Rubbia, C., Ryan, J., Sabate-Gilarte, M., Saxena, A., Schillebeeckx, P., Schmidt, S., Sedyshev, P., Stamatopoulos, A., Tagliente, G., Tain, J. L., Tarifeno-Saldivia, A., Tassan-Got, L., Tsinganis, A., Valenta, S., Vannini, G., Variale, V., Vaz, P., Ventura, A., Vlachoudis, V., Vlastou, R., Vollaire, J., Wallner, A., Warren, S., Weigand, M., Weiß, C., Wolf, C., Woods, P. J., Wright, T., Zugec, P., and collaboration, n_TOF

Subjects
Physics - Instrumentation and Detectors, High Energy Physics - Experiment, Nuclear Experiment
Abstract

The newly built second experimental area EAR2 of the n_TOF spallation neutron source at CERN allows to perform (n, charged particles) experiments on short-lived highly radioactive targets. This paper describes a detection apparatus and the experimental procedure for the determination of the cross-section of the 7Be(n,{\alpha}) reaction, which represents one of the focal points toward the solution of the cosmological Lithium abundance problem, and whose only measurement, at thermal energy, dates back to 1963. The apparently unsurmountable experimental difficulties stemming from the huge 7Be {\gamma}-activity, along with the lack of a suitable neutron beam facility, had so far prevented further measurements. The detection system is subject to considerable radiation damage, but is capable of disentangling the rare reaction signals from the very high background. This newly developed setup could likely be useful also to study other challenging reactions requiring the detectors to be installed directly in the neutron beam., Comment: submitted to Nuclear Instruments and Methods in Physics Research A

Published
2016
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15. TOF Facility at CERN

Author

The n_TOF Collaboration, Damone, L. A., Barbagallo, M., Mastromarco, M., Mengoni, A., Colonna, N., Cosentino, L., Maugeri, E. A., Heinitz, S., Schumann, D., Dressler, R., Käppeler, F., Finocchiaro, P., Andrzejewski, J., Perkowski, J., Gawlik, A., Aberle, O., Altstadt, S., Ayranov, M., Audouin, L., Bacak, M., Balibrea-Correa, J., Ballof, J., Bcares, V., Bečvař, F., Beinrucker, C., Bellia, G., Bernardes, A. P., Berthoumieux, E., Billowes, J., Borge, M. J. G., Bosnar, D., Brown, A., Brugger, M., Busso, Maurizio, Caamaño, M., Calviño, F., Calviani, M., Cano-Ott, D., Cardella, R., Casanovas, A., Castelluccio, D. M., Catherall, R., Cerutti, F., Chen, Y. H., Chiaveri, E., Corts, G., Cortès-Giraldo, M. A., Cristallo, Sergio, Diakaki, M., Dietz, M., Domingo-Pardo, C., Dorsival, A., Dupont, E., Durán, I., Fernàndez-Dominguez, B., Ferrari, A., Ferreira, P., Furman, W., Ganesan, S., Garca-Rios, A., Gilardoni, S., Glodariu, T., Göbel, Kathrin, Gonçalves, I. F., Gonzalez-Romero, E., Goodacre, T. D., Griesmayer, E., Guerrero, C., Gunsing, F., Harada, H., Heftrich, Tanja, Heyse, J., Jenkins, D. G., Jericha, E., Johnston, K., Kadi, Y., Kalamara, A., Katabuchi, T., Kavrigin, P., Kimura, A., Kivel, N., Kohester, U., Kokkoris, M., Krtička, M., Kurtulgil, Deniz, Leal-Cidoncha, E., Lederer-Woods, Claudia, Leeb, H., Lerendegui-Marco, J., Lo Meo, S., Lonsdale, S. J., Losito, R., Macina, D., Marganiec, J., Marsh, B., Martínez, T., Martins Correia, J. G., Masi, A., Massimi, C., Mastinu, P., Matteucci, F., Mazzone, A., Mendoza, E., Milazzo, P. M., Mingrone, Federica, Mirea, M., Musumarra, A., Negret, A., Nolte, R., Oprea, A., Patronis, N., Pavlik, A., Piersanti, Luciano, Piscopo, M., Plompen, A., Porras, I., Praena, J., Quesada, J. M., Radeck, D., Rajeev, K., Rauscher, Thomas, Reifarth, René, Riego-Perez, A., Rothe, S., Rout, P., Rubbia, C., Ryan, J., Sabaté-Gilarte, M., Saxena, A., Schell, J., Schillebeeckx, P., Schmidt, S., Sedyshev, P., Seiffert, C., Smith, A. G., Sosnin, N. V., Stamatopoulos, A., Stora, T., Tagliente, G., Tain, J. L., Tarifeño-Saldivia, A., Tassan-Got, L., Tsinganis, A., Valenta, S., Vannini, G., Variale, V., Vaz, P., Ventura, A., Vlachoudis, V., Vlastou, R., Wallner, A., Warren, S., Weigand, Mario, Weiß, C., Wolf, C., Woods, P. J., Wright, T., Žugec, P., Formicola, Alba, editor, Junker, Matthias, editor, Gialanella, Lucio, editor, and Imbriani, Gianluca, editor

Published
2019
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16. Measurement of 73Ge(n,γ) cross sections and implications for stellar nucleosynthesis

Author

C. Lederer-Woods, U. Battino, P. Ferreira, A. Gawlik, C. Guerrero, F. Gunsing, S. Heinitz, J. Lerendegui-Marco, A. Mengoni, R. Reifarth, A. Tattersall, S. Valenta, C. Weiss, O. Aberle, J. Andrzejewski, L. Audouin, V. Bécares, M. Bacak, J. Balibrea, M. Barbagallo, S. Barros, F. Bečvář, C. Beinrucker, F. Belloni, E. Berthoumieux, J. Billowes, D. Bosnar, M. Brugger, M. Caamaño, F. Calviño, M. Calviani, D. Cano-Ott, F. Cerutti, E. Chiaveri, N. Colonna, G. Cortés, M.A. Cortés-Giraldo, L. Cosentino, L.A. Damone, K. Deo, M. Diakaki, M. Dietz, C. Domingo-Pardo, R. Dressler, E. Dupont, I. Durán, B. Fernández-Domínguez, A. Ferrari, P. Finocchiaro, R.J.W. Frost, V. Furman, K. Göbel, A.R. García, I. Gheorghe, T. Glodariu, I.F. Gonçalves, E. González-Romero, A. Goverdovski, E. Griesmayer, H. Harada, T. Heftrich, A. Hernández-Prieto, J. Heyse, D.G. Jenkins, E. Jericha, F. Käppeler, Y. Kadi, T. Katabuchi, P. Kavrigin, V. Ketlerov, V. Khryachkov, A. Kimura, N. Kivel, I. Knapova, M. Kokkoris, M. Krtička, E. Leal-Cidoncha, H. Leeb, M. Licata, S. Lo Meo, R. Losito, D. Macina, J. Marganiec, T. Martínez, C. Massimi, P. Mastinu, M. Mastromarco, F. Matteucci, E. Mendoza, P.M. Milazzo, F. Mingrone, M. Mirea, S. Montesano, A. Musumarra, R. Nolte, F.R. Palomo-Pinto, C. Paradela, N. Patronis, A. Pavlik, J. Perkowski, J.I. Porras, J. Praena, J.M. Quesada, T. Rauscher, A. Riego-Perez, M. Robles, C. Rubbia, J.A. Ryan, M. Sabaté-Gilarte, A. Saxena, P. Schillebeeckx, S. Schmidt, D. Schumann, P. Sedyshev, A.G. Smith, A. Stamatopoulos, S.V. Suryanarayana, G. Tagliente, J.L. Tain, A. Tarifeño-Saldivia, L. Tassan-Got, A. Tsinganis, G. Vannini, V. Variale, P. Vaz, A. Ventura, V. Vlachoudis, R. Vlastou, A. Wallner, S. Warren, M. Weigand, T. Wright, and P. Žugec

Subjects
Physics, QC1-999
Abstract

73Ge(n,γ) cross sections were measured at the neutron time-of-flight facility n_TOF at CERN up to neutron energies of 300 keV, providing for the first time experimental data above 8 keV. Results indicate that the stellar cross section at kT=30 keV is 1.5 to 1.7 times higher than most theoretical predictions. The new cross sections result in a substantial decrease of 73Ge produced in stars, which would explain the low isotopic abundance of 73Ge in the solar system. Keywords: Nucleosynthesis, Neutron capture, s process, Germanium, n_TOF

Published
2019
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17. Corrigendum: 'Measurement of Ge( , ) cross sections and implications for stellar nucleosynthesis' [Phys. Lett. B 790 (2019) 458–465]

Author

Lederer-Woods, C., Battino, U., Ferreira, P., Gawlik, A., Guerrero, C., Gunsing, F., Heinitz, S., Lerendegui-Marco, J., Mengoni, A., Reifarth, R., Tattersall, A., Valenta, S., Weiss, C., Aberle, O., Andrzejewski, J., Audouin, L., Bécares, V., Bacak, M., Balibrea, J., Barbagallo, M., Barros, S., Bečvář, F., Beinrucker, C., Belloni, F., Berthoumieux, E., Billowes, J., Bosnar, D., Brugger, M., Caamaño, M., Calviño, F., Calviani, M., Cano-Ott, D., Cerutti, F., Chiaveri, E., Colonna, N., Cortés, G., Cortés-Giraldo, M.A., Cosentino, L., Damone, L.A., Deo, K., Diakaki, M., Dietz, M., Domingo-Pardo, C., Dressler, R., Dupont, E., Durán, I., Fernández-Domínguez, B., Ferrari, A., Finocchiaro, P., Frost, R.J.W., Furman, V., Göbel, K., García, A.R., Gheorghe, I., Glodariu, T., Gonçalves, I.F., González-Romero, E., Goverdovski, A., Griesmayer, E., Harada, H., Heftrich, T., Hernández-Prieto, A., Heyse, J., Jenkins, D.G., Jericha, E., Käppeler, F., Kadi, Y., Katabuchi, T., Kavrigin, P., Ketlerov, V., Khryachkov, V., Kimura, A., Kivel, N., Knapova, I., Kokkoris, M., Krtička, M., Leal-Cidoncha, E., Leeb, H., Licata, M., Lo Meo, S., Losito, R., Macina, D., Marganiec, J., Martínez, T., Massimi, C., Mastinu, P., Mastromarco, M., Matteucci, F., Mendoza, E., Milazzo, P.M., Mingrone, F., Mirea, M., Montesano, S., Musumarra, A., Nolte, R., Palomo-Pinto, F.R., Paradela, C., Patronis, N., Pavlik, A., Perkowski, J., Porras, J.I., Praena, J., Quesada, J.M., Rauscher, T., Riego-Perez, A., Robles, M., Rubbia, C., Ryan, J.A., Sabaté-Gilarte, M., Saxena, A., Schillebeeckx, P., Schmidt, S., Schumann, D., Sedyshev, P., Smith, A.G., Stamatopoulos, A., Suryanarayana, S.V., Tagliente, G., Tain, J.L., Tarifeño-Saldivia, A., Tassan-Got, L., Tsinganis, A., Vannini, G., Variale, V., Vaz, P., Ventura, A., Vlachoudis, V., Vlastou, R., Wallner, A., Warren, S., Weigand, M., Wright, T., and Žugec, P.

Published
2023

18. Corrigendum: “Measurement of 73Ge(n,γ) cross sections and implications for stellar nucleosynthesis” [Phys. Lett. B 790 (2019) 458–465]

Author

Lederer-Woods, C., primary, Battino, U., additional, Ferreira, P., additional, Gawlik, A., additional, Guerrero, C., additional, Gunsing, F., additional, Heinitz, S., additional, Lerendegui-Marco, J., additional, Mengoni, A., additional, Reifarth, R., additional, Tattersall, A., additional, Valenta, S., additional, Weiss, C., additional, Aberle, O., additional, Andrzejewski, J., additional, Audouin, L., additional, Bécares, V., additional, Bacak, M., additional, Balibrea, J., additional, Barbagallo, M., additional, Barros, S., additional, Bečvář, F., additional, Beinrucker, C., additional, Belloni, F., additional, Berthoumieux, E., additional, Billowes, J., additional, Bosnar, D., additional, Brugger, M., additional, Caamaño, M., additional, Calviño, F., additional, Calviani, M., additional, Cano-Ott, D., additional, Cerutti, F., additional, Chiaveri, E., additional, Colonna, N., additional, Cortés, G., additional, Cortés-Giraldo, M.A., additional, Cosentino, L., additional, Damone, L.A., additional, Deo, K., additional, Diakaki, M., additional, Dietz, M., additional, Domingo-Pardo, C., additional, Dressler, R., additional, Dupont, E., additional, Durán, I., additional, Fernández-Domínguez, B., additional, Ferrari, A., additional, Finocchiaro, P., additional, Frost, R.J.W., additional, Furman, V., additional, Göbel, K., additional, García, A.R., additional, Gheorghe, I., additional, Glodariu, T., additional, Gonçalves, I.F., additional, González-Romero, E., additional, Goverdovski, A., additional, Griesmayer, E., additional, Harada, H., additional, Heftrich, T., additional, Hernández-Prieto, A., additional, Heyse, J., additional, Jenkins, D.G., additional, Jericha, E., additional, Käppeler, F., additional, Kadi, Y., additional, Katabuchi, T., additional, Kavrigin, P., additional, Ketlerov, V., additional, Khryachkov, V., additional, Kimura, A., additional, Kivel, N., additional, Knapova, I., additional, Kokkoris, M., additional, Krtička, M., additional, Leal-Cidoncha, E., additional, Leeb, H., additional, Licata, M., additional, Lo Meo, S., additional, Losito, R., additional, Macina, D., additional, Marganiec, J., additional, Martínez, T., additional, Massimi, C., additional, Mastinu, P., additional, Mastromarco, M., additional, Matteucci, F., additional, Mendoza, E., additional, Milazzo, P.M., additional, Mingrone, F., additional, Mirea, M., additional, Montesano, S., additional, Musumarra, A., additional, Nolte, R., additional, Palomo-Pinto, F.R., additional, Paradela, C., additional, Patronis, N., additional, Pavlik, A., additional, Perkowski, J., additional, Porras, J.I., additional, Praena, J., additional, Quesada, J.M., additional, Rauscher, T., additional, Riego-Perez, A., additional, Robles, M., additional, Rubbia, C., additional, Ryan, J.A., additional, Sabaté-Gilarte, M., additional, Saxena, A., additional, Schillebeeckx, P., additional, Schmidt, S., additional, Schumann, D., additional, Sedyshev, P., additional, Smith, A.G., additional, Stamatopoulos, A., additional, Suryanarayana, S.V., additional, Tagliente, G., additional, Tain, J.L., additional, Tarifeño-Saldivia, A., additional, Tassan-Got, L., additional, Tsinganis, A., additional, Vannini, G., additional, Variale, V., additional, Vaz, P., additional, Ventura, A., additional, Vlachoudis, V., additional, Vlastou, R., additional, Wallner, A., additional, Warren, S., additional, Weigand, M., additional, Wright, T., additional, and Žugec, P., additional

Published
2023
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19. The new vertical neutron beam line at the CERN n_TOF facility design and outlook on the performance

Author

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., Lo Meo, S., López, D., Losito, R., Macina, D., Marganiec, J., Martínez, T., Massimi, C., Mastinu, P.F., Mastromarco, M., Matteucci, F., Mendoza, E., Mengoni, A., 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., and Žugec, P.

Published
2015
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20. Corrigendum: 'Measurement of ⁷³Ge(n,γ) cross sections and implications for stellar nucleosynthesis' [Phys. Lett. B 790 (2019) 458–465]

Author

Lederer-Woods, C., Battino, U., Ferreira, P., Gawlik, A., Guerrero, C., Gunsing, F., Heinitz, S., Lerendegui-Marco, J., Mengoni, A., Reifarth, R., Tattersall, A., Valenta, S., Weiss, C., Aberle, O., Andrzejewski, J., Audouin, L., Bécares, V., Bacak, M., Balibrea, J., Barbagallo, M., Barros, S., Bečvář, F., Beinrucker, C., Belloni, F., Berthoumieux, E., Billowes, J., Bosnar, D., Brugger, M., Caamaño, M., Calviño, F., Calviani, M., Cano-Ott, D., Cerutti, F., Chiaveri, E., Colonna, N., Cortés, G., Cortés-Giraldo, M. A., Cosentino, L., Damone, L. A., Deo, K., Diakaki, M., Dietz, M., Domingo-Pardo, C., Dressler, R., Dupont, E., Durán, I., Fernández-Domínguez, B., Ferrari, A., Finocchiaro, P., Frost, R. J. W., Furman, V., Göbel, K., García, A. R., Gheorghe, I., Glodariu, T., Gonçalves, I. F., González-Romero, E., Goverdovski, A., Griesmayer, E., Harada, H., Heftrich, T., Hernández-Prieto, A., Heyse, J., Jenkins, D. G., Jericha, E., Käppeler, F., Kadi, Y., Katabuchi, T., Kavrigin, P., Ketlerov, V., Khryachkov, V., Kimura, A., Kivel, N., Knapova, I., Kokkoris, M., Krtička, M., Leal-Cidoncha, E., Leeb, H., Licata, M., Lo Meo, S., Losito, R., Macina, D., Marganiec, J., Martínez, T., Massimi, C., Mastinu, P., Mastromarco, M., Matteucci, F., Mendoza, E., Milazzo, P. M., Mingrone, F., Mirea, M., Montesano, S., Musumarra, A., Nolte, R., Palomo-Pinto, F. R., Paradela, C., Patronis, N., Pavlik, A., Perkowski, J., Porras, J. I., Praena, J., Quesada, J. M., Rauscher, T., Riego-Perez, A., Robles, M., Rubbia, C., Ryan, J. A., Sabaté-Gilarte, M., Saxena, A., Schillebeeckx, P., Schmidt, S., Schumann, D., Sedyshev, P., Smith, A. G., Stamatopoulos, A., Suryanarayana, S. V., Tagliente, G., Tain, J. L., Tarifeño-Saldivia, A., Tassan-Got, L., Tsinganis, A., Vannini, G., Variale, V., Vaz, P., Ventura, A., Vlachoudis, V., Vlastou, R., Wallner, A., Warren, S., Weigand, M., Wright, T., and Žugec, P.

Subjects
Physics, ddc:530
Published
2023
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21. $^{74}$Ge($n,\gamma $) cross section below 70 keV measured at n_TOF CERN

Author

Lederer-Woods, C, Aberle, O, Andrzejewski, J, Audouin, L, Bécares, V, Bacak, M, Balibrea, J, Barbagallo, M, Barros, S, Battino, U, Bečvář, F, Beinrucker, C, Berthoumieux, E, Billowes, J, Bosnar, D, Brugger, M, Caamaño, M, Calviño, F, Calviani, M, Cano-Ott, D, Cardella, R, Casanovas, A, Castelluccio, D M, Cerutti, F, Chen, Y H, Chiaveri, E, Colonna, N, Cortés, G, Cortés-Giraldo, M A, Cosentino, L, Damone, L A, Diakaki, M, Domingo-Pardo, C, Dressler, R, Dupont, E, Durán, I, Fernández-Domínguez, B, Ferrari, A, Ferreira, P, Finocchiaro, P, Furman, V, Göbel, K, García, A R, Gawlik-Ramięga, A, Glodariu, T, Gonçalves, I F, González-Romero, E, Goverdovski, A, Griesmayer, E, Guerrero, C, Gunsing, F, Harada, H, Heftrich, T, Heinitz, S, Heyse, J, Jenkins, D G, Jericha, E, Käppeler, F, Kadi, Y, Katabuchi, T, Kavrigin, P, Ketlerov, V, Khryachkov, V, Kimura, A, Kivel, N, Kokkoris, M, Krtička, M, Leal-Cidoncha, E, Leeb, H, Lerendegui-Marco, J, Meo, S Lo, Lonsdale, S J, Losito, R, Macina, D, Marganiec, J, Martínez, T, Massimi, C, Mastinu, P, Mastromarco, M, Matteucci, F, Maugeri, E A, Mendoza, E, Mengoni, A, Milazzo, P M, Mingrone, F, Mirea, M, Montesano, S, Musumarra, A, Nolte, R, Oprea, A, Patronis, N, Pavlik, A, Perkowski, J, Porras, I, Praena, J, Quesada, J M, Rajeev, K, Rauscher, T, Reifarth, R, Riego-Perez, A, Rout, P C, Rubbia, C, Ryan, J A, Sabaté-Gilarte, M, Saxena, A, Schillebeeckx, P, Schmidt, S, Schumann, D, Sedyshev, P, Smith, A G, Stamatopoulos, A, Tagliente, G, Tain, J L, Tarifeño-Saldivia, A, Tassan-Got, L, Tsinganis, A, Valenta, S, Vannini, G, Variale, V, Vaz, P, Ventura, A, Vlachoudis, V, Vlastou, R, Wallner, A, Warren, S, Weigand, M, Weiss, C, Wolf, C, Woods, P J, Wright, T, Žugec, P, 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, Universitat Politècnica de Catalunya. Departament de Física, and Universitat Politècnica de Catalunya. ANT - Advanced Nuclear Technologies Research Group

Subjects
neutron capture, 74Ge, neutron time of flight, n_TOF, Nuclear and High Energy Physics, Física [Àrees temàtiques de la UPC], Physical, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Física, Nuclear Physics - Experiment
Abstract

The version of record os available online at:https://doi.org/10.1140/epja/s10050-022-00878-5 Neutron capture reaction cross sections on 74Ge are of importance to determine 74Ge production during the astrophysical slow neutron capture process. We present new resonancedataon74Ge(n,¿)reactionsbelow70keVneutron energy. We calculate Maxwellian averaged cross sections, combining our data below 70 keV with evaluated cross sections at higher neutron energies. Our stellar cross sections are in agreement with a previous activation measurement performed at Forschungszentrum Karlsruhe by Marganiec et al., once their data has been re-normalised to account for an update in the reference cross section used in that experiment Peer Reviewed Article escrit per 123 autors/autores C. Lederer-Woods, O. Aberle, J. Andrzejewski, L. Audouin, V. Bécares, M. Bacak, J. Balibrea, M. Barbagallo, S. Barros, U. Battino, F. Bečvář, C. Beinrucker, E. Berthoumieux, J. Billowes, D. Bosnar, M. Brugger, M. Caamaño, F. Calviño, M. Calviani, D. Cano-Ott, R. Cardella, A. Casanovas, D. M. Castelluccio, F. Cerutti, Y. H. Chen, E. Chiaveri, N. Colonna, G. Cortés, M. A. Cortés-Giraldo, L. Cosentino, L. A. Damone, M. Diakaki, C. Domingo-Pardo, R. Dressler, E. Dupont, I. Durán, B. Fernández-Domínguez, A. Ferrari, P. Ferreira, P. Finocchiaro, V. Furman, K. Göbel, A. R. García, A. Gawlik-Ramięga, T. Glodariu, I. F. Gonçalves, E. González-Romero, A. Goverdovski, E. Griesmayer, C. Guerrero, F. Gunsing, H. Harada, T. Heftrich, S. Heinitz, J. Heyse, D. G. Jenkins, E. Jericha, F. Käppeler, Y. Kadi, T. Katabuchi, P. Kavrigin, V. Ketlerov, V. Khryachkov, A. Kimura, N. Kivel, M. Kokkoris, M. Krtička, E. Leal-Cidoncha, H. Leeb, J. Lerendegui-Marco, S. Lo Meo, S. J. Lonsdale, R. Losito, D. Macina, J. Marganiec, T. Martínez, C. Massimi, P. Mastinu, M. Mastromarco, F. Matteucci, E. A. Maugeri, E. Mendoza, A. Mengoni, P. M. Milazzo, F. Mingrone, M. Mirea, S. Montesano, A. Musumarra, R. Nolte, A. Oprea, N. Patronis, A. Pavlik, J. Perkowski, I. Porras, J. Praena, J. M. Quesada, K. Rajeev, T. Rauscher, R. Reifarth, A. Riego-Perez, P. C. Rout, C. Rubbia, J. A. Ryan, M. Sabaté-Gilarte, A. Saxena, P. Schillebeeckx, S. Schmidt, D. Schumann, P. Sedyshev, A. G. Smith, A. Stamatopoulos, G. Tagliente, J. L. Tain, A. Tarifeño-Saldivia, L. Tassan-Got, A. Tsinganis, S. Valenta, G. Vannini, V. Variale, P. Vaz, A. Ventura, V. Vlachoudis, R. Vlastou, A. Wallner, S. Warren, M. Weigand, C. Weiss, C. Wolf, P. J. Woods, T. Wright, P. Žugec

Published
2022

22. Zr 92 (n,g) and (n,tot) measurements at the GELINA and n_TOF facilities

Author

Tagliente G., Kopecky S., Heyse J., Krticka M., Massimi C., Mengoni A., Milazzo P. M., Plompen A. J. M., Schillebeeckx P., Valenta S., Wynants R., Altstadt S., Andrzejewski J., Audouin L., Becares V., Barbagallo M., Becvar F., Belloni F., Berthoumieux E., Billowes J., Boccone V., Bosnar D., Brugger M., Calvino F., Calviani M., Cano-Ott D., Carrapico C., Cerutti F., Chiaveri E., Chin M., Colonna N., Cortes G., Cortes-Giraldo M. A., Cristallo S., Diakaki M., Domingo-Pardo C., Dressler R., Duran I., Eleftheriadis C., Ferrari A., Fraval K., Furman V., Gobel K., Gomez-Hornillos M. B., Ganesan S., Garcia A. R., Giubrone G., Goncalves I. F., Gonzalez-Romero E., Goverdovski A., Griesmayer E., Guerrero C., Gunsing F., Heftrich T., Hernandez-Prieto A., Jericha E., Kappeler F., Kadi Y., Karadimos D., Katabuchi T., Ketlerov V., Khryachkov V., Kivel N., Kokkoris M., Kroll J., Lampoudis C., Langer C., Leal-Cidoncha E., Lederer C., Leeb H., Leong L. S., Losito R., Lugaro M., Mallick A., Manousos A., Marganiec J., Martinez T., Mastinu P., Mastromarco M., Mendoza E., Mingrone F., Mirea M., Paradela C., Pavlik A., Perkowski J., Praena J., Quesada J. M., Rauscher T., Reifarth R., Riego-Perez A., Robles M., Rubbia C., Ryan J. A., Sabate-Gilarte M., Sarmento R., Saxena A., Schmidt S., Schumann D., Sedyshev P., Tain J. L., Tarifeno-Saldivia A., Tarrio D., Tassan-Got L., Tsinganis A., Vannini G., Variale V., Vaz P., Ventura A., Vermeulen M. J., Vescovi D., Vlachoudis V., Vlastou R., Wallner A., Ware T., Weigand M., Weiss C., Wright T., Zugec P., Tagliente G., Kopecky S., Heyse J., Krticka M., Massimi C., Mengoni A., Milazzo P.M., Plompen A.J.M., Schillebeeckx P., Valenta S., Wynants R., Altstadt S., Andrzejewski J., Audouin L., Becares V., Barbagallo M., Becvar F., Belloni F., Berthoumieux E., Billowes J., Boccone V., Bosnar D., Brugger M., Calvino F., Calviani M., Cano-Ott D., Carrapico C., Cerutti F., Chiaveri E., Chin M., Colonna N., Cortes G., Cortes-Giraldo M.A., Cristallo S., Diakaki M., Domingo-Pardo C., Dressler R., Duran I., Eleftheriadis C., Ferrari A., Fraval K., Furman V., Gobel K., Gomez-Hornillos M.B., Ganesan S., Garcia A.R., Giubrone G., Goncalves I.F., Gonzalez-Romero E., Goverdovski A., Griesmayer E., Guerrero C., Gunsing F., Heftrich T., Hernandez-Prieto A., Jericha E., Kappeler F., Kadi Y., Karadimos D., Katabuchi T., Ketlerov V., Khryachkov V., Kivel N., Kokkoris M., Kroll J., Lampoudis C., Langer C., Leal-Cidoncha E., Lederer C., Leeb H., Leong L.S., Losito R., Lugaro M., Mallick A., Manousos A., Marganiec J., Martinez T., Mastinu P., Mastromarco M., Mendoza E., Mingrone F., Mirea M., Paradela C., Pavlik A., Perkowski J., Praena J., Quesada J.M., Rauscher T., Reifarth R., Riego-Perez A., Robles M., Rubbia C., Ryan J.A., Sabate-Gilarte M., Sarmento R., Saxena A., Schmidt S., Schumann D., Sedyshev P., Tain J.L., Tarifeno-Saldivia A., Tarrio D., Tassan-Got L., Tsinganis A., Vannini G., Variale V., Vaz P., Ventura A., Vermeulen M.J., Vescovi D., Vlachoudis V., Vlastou R., Wallner A., Ware T., Weigand M., Weiss C., Wright T., and Zugec P.

Subjects
n_TOF, s process, Zr
Published
2022

23. Nuclear data activities at the n_TOF facility at CERN

Author

Gunsing, F., Aberle, O., Andrzejewski, J., Audouin, L., Bécares, V., Bacak, M., Balibrea-Correa, J., Barbagallo, M., Barros, S., Bečvář, F., Beinrucker, C., Belloni, F., Berthoumieux, E., Billowes, J., Bosnar, D., Brugger, M., Caamaño, M., Calviño, F., Calviani, M., Cano-Ott, D., Cardella, R., Casanovas, A., Castelluccio, D. M., Cerutti, F., Chen, Y. H., Chiaveri, E., Colonna, N., Cortés-Giraldo, M. A., Cortés, G., Cosentino, L., Damone, L. A., Deo, K., Diakaki, M., Domingo-Pardo, C., Dressler, R., Dupont, E., Durán, I., Fernández-Domínguez, B., Ferrari, A., Ferreira, P., Finocchiaro, P., Frost, R. J. W., Furman, V., Ganesan, S., García, A. R., Gawlik, A., Gheorghe, I., Glodariu, T., Gonçalves, I. F., González, E., Goverdovski, A., Griesmayer, E., Guerrero, C., Göbel, K., Harada, H., Heftrich, T., Heinitz, S., Hernández-Prieto, A., Heyse, J., Jenkins, D. G., Jericha, E., Käppeler, F., Kadi, Y., 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., Lo Meo, S., Lonsdale, S. J., Losito, R., Macina, D., Marganiec, J., Martínez, T., Masi, A., Massimi, C., Mastinu, P., Mastromarco, M., Matteucci, F., Maugeri, E. A., Mazzone, A., Mendoza, E., Mengoni, A., Milazzo, P. M., Mingrone, F., Mirea, M., Montesano, S., Musumarra, A., Nolte, R., Oprea, A., Palomo-Pinto, F. R., Paradela, C., Patronis, N., Pavlik, A., Perkowski, J., Porras, I., Praena, J., Quesada, J. M., Rajeev, K., Rauscher, T., Reifarth, R., Riego-Perez, A., Robles, M., Rout, P., Radeck, D., Rubbia, C., Ryan, J. A., Sabaté-Gilarte, M., Saxena, A., Schillebeeckx, P., Schmidt, S., Schumann, D., Sedyshev, P., Smith, A. G., Stamatopoulos, A., Suryanarayana, S. V., Tagliente, G., Tain, J. L., Tarifeño-Saldivia, A., Tarrío, D., Tassan-Got, L., Tsinganis, A., Valenta, S., Vannini, G., Variale, V., Vaz, P., Ventura, A., Vlachoudis, V., Vlastou, R., Wallner, A., Warren, S., Weigand, M., Weiss, C., Wolf, C., Woods, P. J., Wright, T., Žugec, P., and The n_TOF Collaboration

Published
2016
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24. Measurement of the α ratio and (n,γ) cross section of U 235 from 0.2 to 200 eV at n_TOF

Author

Balibrea-Correa J., Mendoza E., Cano-Ott D., Gonzalez E., Capote R., Krticka M., Altstadt S., Andrzejewski J., Audouin L., Becares V., Barbagallo M., Becvar F., Belloni F., Berthoumieux E., Billowes J., Boccone V., Bosnar D., Brugger M., Calviani M., Calvino F., Carrapico C., Cerutti F., Chiaveri E., Chin M., Colonna N., Cortes G., Cortes-Giraldo M. A., Diakaki M., Domingo-Pardo C., Dressler R., Duran I., Eleftheriadis C., Ferrari A., Fraval K., Furman V., Gobel K., Gomez-Hornillos M. B., Ganesan S., Garcia A. R., Giubrone G., Goncalves I. F., Goverdovski A., Griesmayer E., Guerrero C., Gunsing F., Heftrich T., Hernandez-Prieto A., Heyse J., Jenkins D. G., Jericha E., Kappeler F., Kadi Y., Karadimos D., Katabuchi T., Ketlerov V., Khryachkov V., Kivel N., Koehler P., Kokkoris M., Kroll J., Lampoudis C., Langer C., Leal-Cidoncha E., Lederer C., Leeb H., Leong L. S., Lerendegui-Marco J., Losito R., Mallick A., Manousos A., Marganiec J., Martinez T., Massimi C., Mastinu P., Mastromarco M., Mengoni A., Milazzo P. M., Mingrone F., Mirea M., Mondelaers W., Paradela C., Pavlik A., Perkowski J., Plompen A. J. M., Praena J., Quesada J. M., Rauscher T., Reifarth R., Riego-Perez A., Robles M., Rubbia C., Ryan J. A., Sabate-Gilarte M., Sarmento R., Saxena A., Schillebeeckx P., Schmidt S., Schumann D., Sedyshev P., Tagliente G., Tain J. L., Tarifeno-Saldivia A., Tarrio 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., Zugec P., Balibrea-Correa, J., Mendoza, E., Cano-Ott, D., Gonzalez, E., Capote, R., Krticka, M., Altstadt, S., Andrzejewski, J., Audouin, L., Becares, V., Barbagallo, M., Becvar, F., Belloni, F., Berthoumieux, E., Billowes, J., Boccone, V., Bosnar, D., Brugger, M., Calviani, M., Calvino, F., Carrapico, C., Cerutti, F., Chiaveri, E., Chin, M., Colonna, N., Cortes, G., Cortes-Giraldo, M. A., Diakaki, M., Domingo-Pardo, C., Dressler, R., Duran, I., Eleftheriadis, C., Ferrari, A., Fraval, K., Furman, V., Gobel, K., Gomez-Hornillos, M. B., Ganesan, S., Garcia, A. R., Giubrone, G., Goncalves, I. F., Goverdovski, A., Griesmayer, E., Guerrero, C., Gunsing, F., Heftrich, T., Hernandez-Prieto, A., Heyse, J., Jenkins, D. G., Jericha, E., Kappeler, F., Kadi, Y., Karadimos, D., Katabuchi, T., Ketlerov, V., Khryachkov, V., Kivel, N., Koehler, P., Kokkoris, M., Kroll, J., Lampoudis, C., Langer, C., Leal-Cidoncha, E., Lederer, C., Leeb, H., Leong, L. S., Lerendegui-Marco, J., Losito, R., Mallick, A., Manousos, A., Marganiec, J., Martinez, T., Massimi, C., Mastinu, P., Mastromarco, M., Mengoni, A., Milazzo, P. M., Mingrone, F., Mirea, M., Mondelaers, W., Paradela, C., Pavlik, A., Perkowski, J., Plompen, A. J. M., Praena, J., Quesada, J. M., Rauscher, T., Reifarth, R., Riego-Perez, A., Robles, M., Rubbia, C., Ryan, J. A., Sabate-Gilarte, M., Sarmento, R., Saxena, A., Schillebeeckx, P., Schmidt, S., Schumann, D., Sedyshev, P., Tagliente, G., Tain, J. L., Tarifeno-Saldivia, A., Tarrio, 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., Zugec, P., Balibrea-Correa J., Mendoza E., Cano-Ott D., Gonzalez E., Capote R., Krticka M., Altstadt S., Andrzejewski J., Audouin L., Becares V., Barbagallo M., Becvar F., Belloni F., Berthoumieux E., Billowes J., Boccone V., Bosnar D., Brugger M., Calviani M., Calvino F., Carrapico C., Cerutti F., Chiaveri E., Chin M., Colonna N., Cortes G., Cortes-Giraldo M.A., Diakaki M., Domingo-Pardo C., Dressler R., Duran I., Eleftheriadis C., Ferrari A., Fraval K., Furman V., Gobel K., Gomez-Hornillos M.B., Ganesan S., Garcia A.R., Giubrone G., Goncalves I.F., Goverdovski A., Griesmayer E., Guerrero C., Gunsing F., Heftrich T., Hernandez-Prieto A., Heyse J., Jenkins D.G., Jericha E., Kappeler F., Kadi Y., Karadimos D., Katabuchi T., Ketlerov V., Khryachkov V., Kivel N., Koehler P., Kokkoris M., Kroll J., Lampoudis C., Langer C., Leal-Cidoncha E., Lederer C., Leeb H., Leong L.S., Lerendegui-Marco J., Losito R., Mallick A., Manousos A., Marganiec J., Martinez T., Massimi C., Mastinu P., Mastromarco M., Mengoni A., Milazzo P.M., Mingrone F., Mirea M., Mondelaers W., Paradela C., Pavlik A., Perkowski J., Plompen A.J.M., Praena J., Quesada J.M., Rauscher T., Reifarth R., Riego-Perez A., Robles M., Rubbia C., Ryan J.A., Sabate-Gilarte M., Sarmento R., Saxena A., Schillebeeckx P., Schmidt S., Schumann D., Sedyshev P., Tagliente G., Tain J.L., Tarifeno-Saldivia A., Tarrio 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 Zugec P.

Subjects
235U, neutron capture, fission, n_TOF
Abstract

We measured the neutron capture-to-fission cross-section ratio (α ratio) and the capture cross section of U235 between 0.2 and 200 eV at the n_TOF facility at CERN. The simultaneous measurement of neutron-induced capture and fission rates was performed by means of the n_TOF BaF2 Total Absorption Calorimeter (TAC), used for detection of γ rays, in combination with a set of micromegas detectors used as fission tagging detectors. The energy dependence of the capture cross section was obtained with help of the Li6(n,t) standard reaction determining the n_TOF neutron fluence; the well-known integral of the U235(n,f) cross section between 7.8 and 11 eV was then used for its absolute normalization. The α ratio, obtained with slightly higher statistical fluctuations, was determined directly, without need for any reference cross section. To perform the analysis of this measurement we developed a new methodology to correct the experimentally observed effect that the probabilities of detecting a fission reaction in the TAC and the micromegas detectors are not independent. The results of this work have been used in a new evaluation of U235 performed within the scope of the Collaborative International Evaluated Library Organisation (CIELO) Project, and are consistent with the ENDF/B-VIII.0 and JEFF-3.3 capture cross sections below 4 eV and above 100 eV. However, the measured capture cross section is on average 10% larger between 4 and 100 eV.

Published
2020

25. Investigation of the Pu 240 (n,f) reaction at the n_TOF/EAR2 facility in the 9 meV-6 MeV range

Author

Stamatopoulos, A., Tsinganis, A., Colonna, N., Kokkoris, M., Vlastou, R., Diakaki, M., Zugec, P., Schillebeeckx, P., Gunsing, F., Sabate-Gilarte, M., Barbagallo, M., Aberle, O., Andrzejewski, J., Audouin, L., Becares, V., Bacak, M., Balibrea, J., Barros, S., Becvar, F., Beinrucker, C., Belloni, F., Berthoumieux, E., Billowes, J., Bosnar, D., Brugger, M., Caamano, M., Lo Meo, S., Calvino, F., Calviani, M., Cano-Ott, D., Cerutti, F., Chiaveri, E., Cortes, G., Cortes-Giraldo, M. A., Cosentino, L., Damone, L. A., Deo, K., Domingo-Pardo, C., Dressler, R., Dupont, E., Duran, I., Fernandez-Dominguez, B., Ferrari, A., Ferreira, P., Finocchiaro, P., Frost, R. J. W., Furman, V., Gobel, K., Garcia, A. R., Gheorghe, I., Glodariu, T., Goncalves, I. F., Gonzalez-Romero, E., Goverdovski, A., Griesmayer, E., Guerrero, C., Harada, H., Heftrich, T., Heinitz, S., Hernandez-Prieto, A., Heyse, J., Jenkins, D. G., Jericha, E., Kappeler, F., Kadi, Y., Katabuchi, T., Kavrigin, P., Ketlerov, V., Khryachkov, V., Kimura, A., Kivel, N., Knapova, I., Krticka, M., Leal-Cidoncha, E., Lederer, C., Leeb, H., Lerendegui-Marco, J., Licata, M., Losito, R., Macina, D., Marganiec, J., Martinez, T., Massimi, C., Mastinu, P., Mastromarco, M., Matteucci, F., Mendoza, E., Mengoni, A., Milazzo, P. M., Mingrone, F., Mirea, M., Montesano, S., Musumarra, A., Nolte, R., Palomo-Pinto, F. R., Paradela, C., Patronis, N., Pavlik, A., Perkowski, J., Plompen, A., Porras, J. I., Praena, J., Quesada, J. M., Rauscher, T., Reifarth, R., Riego-Perez, A., Robles, M., Rubbia, C., Ryan, J. A., Saxena, A., Schmidt, S., Schumann, D., Sedyshev, P., Smith, A. G., Suryanarayana, S. V., Tagliente, G., Tain, J. L., Tarifeno-Saldivia, A., Tassan-Got, L., Valenta, S., Vannini, G., Variale, V., Vaz, P., Ventura, A., Vlachoudis, V., Wallner, A., Warren, S., Weigand, M., Weiss, C., Wright, T., Stamatopoulos, A., Tsinganis, A., Colonna, N., Kokkoris, M., Vlastou, R., Diakaki, M., Zugec, P., Schillebeeckx, P., Gunsing, F., Sabate-Gilarte, M., Barbagallo, M., Aberle, O., Andrzejewski, J., Audouin, L., Becares, V., Bacak, M., Balibrea, J., Barros, S., Becvar, F., Beinrucker, C., Belloni, F., Berthoumieux, E., Billowes, J., Bosnar, D., Brugger, M., Caamano, M., Lo Meo, S., Calvino, F., Calviani, M., Cano-Ott, D., Cerutti, F., Chiaveri, E., Cortes, G., Cortes-Giraldo, M. A., Cosentino, L., Damone, L. A., Deo, K., Domingo-Pardo, C., Dressler, R., Dupont, E., Duran, I., Fernandez-Dominguez, B., Ferrari, A., Ferreira, P., Finocchiaro, P., Frost, R. J. W., Furman, V., Gobel, K., Garcia, A. R., Gheorghe, I., Glodariu, T., Goncalves, I. F., Gonzalez-Romero, E., Goverdovski, A., Griesmayer, E., Guerrero, C., Harada, H., Heftrich, T., Heinitz, S., Hernandez-Prieto, A., Heyse, J., Jenkins, D. G., Jericha, E., Kappeler, F., Kadi, Y., Katabuchi, T., Kavrigin, P., Ketlerov, V., Khryachkov, V., Kimura, A., Kivel, N., Knapova, I., Krticka, M., Leal-Cidoncha, E., Lederer, C., Leeb, H., Lerendegui-Marco, J., Licata, M., Losito, R., Macina, D., Marganiec, J., Martinez, T., Massimi, C., Mastinu, P., Mastromarco, M., Matteucci, F., Mendoza, E., Mengoni, A., Milazzo, P. M., Mingrone, F., Mirea, M., Montesano, S., Musumarra, A., Nolte, R., Palomo-Pinto, F. R., Paradela, C., Patronis, N., Pavlik, A., Perkowski, J., Plompen, A., Porras, J. I., Praena, J., Quesada, J. M., Rauscher, T., Reifarth, R., Riego-Perez, A., Robles, M., Rubbia, C., Ryan, J. A., Saxena, A., Schmidt, S., Schumann, D., Sedyshev, P., Smith, A. G., Suryanarayana, S. V., Tagliente, G., Tain, J. L., Tarifeno-Saldivia, A., Tassan-Got, L., Valenta, S., Vannini, G., Variale, V., Vaz, P., Ventura, A., Vlachoudis, V., Wallner, A., Warren, S., Weigand, M., Weiss, C., Wright, T., Stamatopoulos A., Tsinganis A., Colonna N., Kokkoris M., Vlastou R., Diakaki M., Zugec P., Schillebeeckx P., Gunsing F., Sabate-Gilarte M., Barbagallo M., Aberle O., Andrzejewski J., Audouin L., Becares V., Bacak M., Balibrea J., Barros S., Becvar F., Beinrucker C., Belloni F., Berthoumieux E., Billowes J., Bosnar D., Brugger M., Caamano M., Lo Meo S., Calvino F., Calviani M., Cano-Ott D., Cerutti F., Chiaveri E., Cortes G., Cortes-Giraldo M.A., Cosentino L., Damone L.A., Deo K., Domingo-Pardo C., Dressler R., Dupont E., Duran I., Fernandez-Dominguez B., Ferrari A., Ferreira P., Finocchiaro P., Frost R.J.W., Furman V., Gobel K., Garcia A.R., Gheorghe I., Glodariu T., Goncalves I.F., Gonzalez-Romero E., Goverdovski A., Griesmayer E., Guerrero C., Harada H., Heftrich T., Heinitz S., Hernandez-Prieto A., Heyse J., Jenkins D.G., Jericha E., Kappeler F., Kadi Y., Katabuchi T., Kavrigin P., Ketlerov V., Khryachkov V., Kimura A., Kivel N., Knapova I., Krticka M., Leal-Cidoncha E., Lederer C., Leeb H., Lerendegui-Marco J., Licata M., Losito R., Macina D., Marganiec J., Martinez T., Massimi C., Mastinu P., Mastromarco M., Matteucci F., Mendoza E., Mengoni A., Milazzo P.M., Mingrone F., Mirea M., Montesano S., Musumarra A., Nolte R., Palomo-Pinto F.R., Paradela C., Patronis N., Pavlik A., Perkowski J., Plompen A., Porras J.I., Praena J., Quesada J.M., Rauscher T., Reifarth R., Riego-Perez A., Robles M., Rubbia C., Ryan J.A., Saxena A., Schmidt S., Schumann D., Sedyshev P., Smith A.G., Suryanarayana S.V., Tagliente G., Tain J.L., Tarifeno-Saldivia A., Tassan-Got L., Valenta S., Vannini G., Variale V., Vaz P., Ventura A., Vlachoudis V., Wallner A., Warren S., Weigand M., Weiss C., and Wright T.

Subjects
fission, neutron physics, n_TOF, 240Pu, Nuclear Experiment
Abstract

Background: Nuclear waste management is considered amongst the major challenges in the field of nuclear energy. A possible means of addressing this issue is waste transmutation in advanced nuclear systems, whose operation requires a fast neutron spectrum. In this regard, the accurate knowledge of neutron-induced reaction cross sections of several (minor) actinide isotopes is essential for design optimization and improvement of safety margins of such systems. One such case is Pu240, due to its accumulation in spent nuclear fuel of thermal reactors and its usage in fast reactor fuel. The measurement of the Pu240(n,f) cross section was previously attempted at the CERN n_TOF facility EAR1 measuring station using the time-of-flight technique. Due to the low amount of available material and the given flux at EAR1, the measurement had to last several months to achieve a sufficient statistical accuracy. This long duration led to detector deterioration due to the prolonged exposure to the high α activity of the fission foils, therefore the measurement could not be successfully completed. Purpose: It is aimed to determine whether it is feasible to study neutron-induced fission at n_TOF/EAR2 and provide data on the Pu240(n,f) reaction in energy regions requested for applications. Methods: The study of the Pu240(n,f) reaction was made at a new experimental area (EAR2) with a shorter flight path which delivered on average 30 times higher flux at fast neutron energies. This enabled the measurement to be performed much faster, thus limiting the exposure of the detectors to the intrinsic activity of the fission foils. The experimental setup was based on microbulk Micromegas detectors and the time-of-flight data were analyzed with an optimized pulse-shape analysis algorithm. Special attention was dedicated to the estimation of the non-negligible counting loss corrections with the development of a new methodology, and other corrections were estimated via Monte Carlo simulations of the experimental setup. Results: This new measurement of the Pu240(n,f) cross section yielded data from 9meV up to 6MeV incident neutron energy and fission resonance kernels were extracted up to 10keV. Conclusions: Neutron-induced fission of high activity samples can be successfully studied at the n_TOF/EAR2 facility at CERN covering a wide range of neutron energies, from thermal to a few MeV.

Published
2020

26. $^{74}$Ge($n,\gamma $) cross section below 70 keV measured at n_TOF CERN

Author

N_TOF Collaboration, Lederer-Woods, C., Aberle, O., Andrzejewski, J., Audouin, L., Bécares, V., Bacak, M., Balibrea, J., Barbagallo, M., Barros, S., Battino, U., Bečvář, F., Beinrucker, C., Berthoumieux, E., Billowes, J., Bosnar, D., Brugger, M., Caamaño, M., Calviño, F., Calviani, M., Cano-Ott, D., Cardella, R., Casanovas, A., Castelluccio, D. M., Cerutti, F., Chen, Y. H., Chiaveri, E., Colonna, N., Cortés, G., Cortés-Giraldo, M. A., Cosentino, L., Damone, L. A., Diakaki, M., Domingo-Pardo, C., Dressler, R., Dupont, E., Durán, I., Fernández-Domínguez, B., Ferrari, A., Ferreira, P., Finocchiaro, P., Furman, V., Göbel, K., García, A. R., Gawlik-Ramięga, A., Glodariu, T., Gonçalves, I. F., González-Romero, E., Goverdovski, A., Griesmayer, E., Guerrero, C., Gunsing, F., Harada, H., Heftrich, T., Heinitz, S., Heyse, J., Jenkins, D. G., Jericha, E., Käppeler, F., Kadi, Y., Katabuchi, T., Kavrigin, P., Ketlerov, V., Khryachkov, V., Kimura, A., Kivel, N., Kokkoris, M., Krtička, M., Leal-Cidoncha, E., Leeb, H., Lerendegui-Marco, J., Meo, S. Lo, Lonsdale, S. J., Losito, R., Macina, D., Marganiec, J., Martínez, T., Massimi, C., Mastinu, P., Mastromarco, M., Matteucci, F., Maugeri, E. A., Mendoza, E., Mengoni, A., Milazzo, P. M., Mingrone, F., Mirea, M., Montesano, S., Musumarra, A., Nolte, R., Oprea, A., Patronis, N., Pavlik, A., Perkowski, J., Porras, I., Praena, J., Quesada, J. M., Rajeev, K., Rauscher, T., Reifarth, R., Riego-Perez, A., Rout, P. C., Rubbia, C., Ryan, J. A., Sabaté-Gilarte, M., Saxena, A., Schillebeeckx, P., Schmidt, S., Schumann, D., Sedyshev, P., Smith, A. G., Stamatopoulos, A., Tagliente, G., Tain, J. L., Tarifeño-Saldivia, A., Tassan-Got, L., Tsinganis, A., Valenta, S., Vannini, G., Variale, V., Vaz, P., Ventura, A., Vlachoudis, V., Vlastou, R., Wallner, A., Warren, S., Weigand, M., Weiss, C., Wolf, C., Woods, P. J., Wright, T., and Žugec, P.

Subjects
Physics, ddc:530
Abstract

Neutron capture reaction cross sections on $^{74}$Ge are of importance to determine $^{74}$Ge production during the astrophysical slow neutron capture process. We present new resonance data on $^{74}$Ge($n,\gamma $) reactions below 70 keV neutron energy. We calculate Maxwellian averaged cross sections, combining our data below 70 keV with evaluated cross sections at higher neutron energies. Our stellar cross sections are in agreement with a previous activation measurement performed at Forschungszentrum Karlsruhe by Marganiec et al., once their data has been re-normalised to account for an update in the reference cross section used in that experiment.

Published
2022

27. $^{92}$Zr($n,\gamma$) and ($n$,tot) measurements at the GELINA and n_TOF facilities

Author

Tagliente, G., Kopecky, S., Heyse, J., Krtička, M., Massimi, C., Mengoni, A., Milazzo, P.M., Plompen, A.J.M., Schillebeeckx, P., Valenta, S., Wynants, R., Altstadt, S., Andrzejewski, J., Audouin, L., Bécares, V., Barbagallo, M., Bečvář, F., Belloni, F., Berthoumieux, E., Billowes, J., Boccone, V., Bosnar, D., Brugger, M., Calviño, F., Calviani, M., Cano-Ott, D., Carrapiço, C., Cerutti, F., Chiaveri, E., Chin, M., Colonna, N., Cortés, G., Cortés-Giraldo, M.A., Cristallo, S., Diakaki, M., Domingo-Pardo, C., Dressler, R., Durán, I., Eleftheriadis, C., Ferrari, A., Fraval, K., Furman, V., Göbel, K., Gómez-Hornillos, M.B., Ganesan, S., García, A.R., Giubrone, G., Gonçalves, I.F., González-Romero, E., Goverdovski, A., Griesmayer, E., Guerrero, C., Gunsing, F., Heftrich, T., Hernández-Prieto, A., Jericha, E., Käppeler, F., Kadi, Y., Karadimos, D., Katabuchi, T., Ketlerov, V., Khryachkov, V., Kivel, N., Kokkoris, M., Kroll, J., Lampoudis, C., Langer, C., Leal-Cidoncha, E., Lederer, C., Leeb, H., Leong, L.S., Losito, R., Lugaro, M., Mallick, A., Manousos, A., Marganiec, J., Martínez, T., Mastinu, P., Mastromarco, M., Mendoza, E., Mingrone, F., Mirea, M., Paradela, C., Pavlik, A., Perkowski, J., Praena, J., Quesada, J.M., Rauscher, T., Reifarth, R., Riego-Perez, A., Tallaj, Amélie, Rubbia, C., Ryan, J.A., Sabaté-Gilarte, M., Sarmento, R., Saxena, A., Schmidt, S., Schumann, D., Sedyshev, P., Tain, J.L., Tarifeño-Saldivia, A., Tarrío, D., Tassan-Got, L., Tsinganis, A., Vannini, G., Variale, V., Vaz, P., Ventura, A., Vermeulen, M.J., Vescovi, D., Vlachoudis, V., Vlastou, R., Wallner, A., Ware, T., Weigand, M., Weiss, C., Wright, T., Žugec, P., Laboratoire de Physique des 2 Infinis Irène Joliot-Curie (IJCLab), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Saclay-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, and n_TOF

Subjects
Astrophysics::High Energy Astrophysical Phenomena, Nuclear Physics - Experiment, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]
Abstract

International audience; Background: Stellar nucleosynthesis of elements heavier than iron is driven by neutron capture processes. 92Zris positioned at a strategic point along the slow nucleosynthesis path, given its proximity to the neutron magicnumber N = 50 and its position at the matching region between the weak and main slow processes.Purpose: In parallel with recent improved astronomical data, the extraction of accurate Maxwellian averagedcross sections (MACSs) derived from a more complete and accurate set of resonance parameters should allowfor a better understanding of the stellar conditions at which nucleosynthesis takes place.Methods: Transmission and capture cross section measurements using enriched 92Zr metallic samples wereperformed at the time-of flight facilities GELINA of JRC-Geel (BE) and n_TOF of CERN (CH). The neutronbeam passing through the samples was investigated in transmission measurements at GELINA using a Li-glassscintillator. The γ rays emitted during the neutron capture reactions were detected by C6D6 detectors at bothGELINA and n_TOF.Results: Resonance parameters of individual resonances up to 81 keV were extracted from a combined resonanceshape analysis of experimental transmissions and capture yields. For the majority of the resonances the paritywas determined from an analysis of the transmission data obtained with different sample thicknesses. Averageresonance parameters were calculated.Conclusions: Maxwellian averaged cross sections were extracted from resonances observed up to 81 keV. TheMACS for kT = 30 keV is fully consistent with experimental data reported in the literature. The MACSs forkT 15 keV are in good agreement with those derived from the ENDF/B-VIII.0 library and recommendedin the KADONIS database. For kT higher than 30 keV differences are observed. A comparison with MACSsobtained with the cross sections recommended in the JEFF-3.3 and JENDL-4.0 libraries shows discrepancieseven for kT 15 keV.

Published
2022

28. $^{92}$Zr (n,y) and (n,tot) measurements at the GELINA and n_TOF facilities

Author

n_TOF Collaboration, Tagliente, G., Kopecky, S., Heyse, J., Krticka, M., Massimi, C., Mengoni, A., Milazzo, P. M., Plompen, A. J. M., Schillebeeckx, P., Valenta, S., Wynants, R., Altstadt, S., Andrzejewski, J., Audouin, L., Bécares, V., Barbagallo, M., Becvár, F., Belloni, F., Berthoumieux, E., Billowes, J., Boccone, V., Bosnar, D., Brugger, M., Calviño, F., Calviani, M., Cano-Ott, D., Carrapiço, C., Cerutti, F., Chiaveri, E., Chin, M., Colonna, N., Cortés, G., Cortés-Giraldo, M. A., Cristallo, S., Diakaki, M., Domingo-Pardo, C., Dressler, R., Durán, I., Eleftheriadis, C., Ferrari, A., Fraval, K., Furman, V., Göbel, K., Gómez-Hornillos, M. B., Ganesan, S., García, A. R., Giubrone, G., Gonçalves, I. F., González-Romero, E., Goverdovski, A., Griesmayer, E., Guerrero, C., Gunsing, F., Heftrich, T., Hernández-Prieto, A., Jericha, E., Käppeler, F., Kadi, Y., Karadimos, D., Katabuchi, T., Ketlerov, V., Khryachkov, V., Kivel, N., Kokkoris, M., Kroll, J., Lampoudis, C., Langer, C., Leal-Cidoncha, E., Lederer, C., Leeb, H., Leong, L. S., Losito, R., Lugaro, M., Mallick, A., Manousos, A., Marganiec, J., Martínez, T., Mastinu, P., Mastromarco, M., Mendoza, E., Mingrone, F., Mirea, M., Paradela, C., Pavlik, A., Perkowski, J., Praena, J., Quesada, J. M., Rauscher, T., Reifarth, R., Riego-Perez, A., Robles, M., Rubbia, C., Ryan, J. A., Sabaté-Gilarte, M., Sarmento, R., Saxena, A., Schmidt, S., Schumann, D., Sedyshev, P., Tain, J. L., Tarifeño-Saldivia, A., Tarrío, D., Tassan-Got, L., Tsinganis, A., Vannini, G., Variale, V., Vaz, P., Ventura, A., Vermeulen, M. J., Vescovi, D., Vlachoudis, V., Vlastou, R., Wallner, A., Ware, T., Weigand, M., Weiss, C., Wright, T., and Žugec, P.

Subjects
Physics, Astrophysics::High Energy Astrophysical Phenomena, ddc:530
Abstract

Background: Stellar nucleosynthesis of elements heavier than iron is driven by neutron capture processes. $^{92}$ is positioned at a strategic point along the slow nucleosynthesis path, given its proximity to the neutron magic number N=50 and its position at the matching region between the weak and main slow processes. Purpose: In parallel with recent improved astronomical data, the extraction of accurate Maxwellian averaged cross sections (MACSs) derived from a more complete and accurate set of resonance parameters should allow for a better understanding of the stellar conditions at which nucleosynthesis takes place. Methods: Transmission and capture cross section measurements using enriched $^{92}$Zr metallic samples were performed at the time-of flight facilities GELINA of JRC-Geel (BE) and n_TOF of CERN (CH). The neutron beam passing through the samples was investigated in transmission measurements at GELINA using a Li-glass scintillator. The γ rays emitted during the neutron capture reactions were detected by C$_{6}$D$_{6}$ detectors at both GELINA and n_TOF. Results: Resonance parameters of individual resonances up to 81 keV were extracted from a combined resonance shape analysis of experimental transmissions and capture yields. For the majority of the resonances the parity was determined from an analysis of the transmission data obtained with different sample thicknesses. Average resonance parameters were calculated. Conclusions: Maxwellian averaged cross sections were extracted from resonances observed up to 81 keV. The MACS for kT=30keV is fully consistent with experimental data reported in the literature. The MACSs for kT≲15keV are in good agreement with those derived from the ENDF/B-VIII.0 library and recommended in the KADoNiS database. For kT higher than 30 keV differences are observed. A comparison with MACSs obtained with the cross sections recommended in the JEFF-3.3 and JENDL 4.0 libraries shows discrepancies even for kT≲15keV.

Published
2022
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29. Zr-92(n, gamma) and (n,tot) measurements at the GELINA and n_TOF facilities

Author

Tagliente, G., Kopecky, S., Heyse, J., Massimi, C., Mengoni, A., Milazzo, P. M., Plompen, A. J. M., Schillebeeckx, P., Valenta, S., Wynants, R., Altstadt, S., Andrzejewski, J., Audouin, L., Becares, V., Barbagallo, M., Belloni, F., Berthoumieux, E., Billowes, J., Boccone, V., Bosnar, D., Brugger, M., Calvino, F., Calviani, M., Cano-Ott, D., Carrapico, C., Cerutti, F., Chiaveri, E., Chin, M., Colonna, N., Cortes, G., Cortes-Giraldo, M. A., Cristallo, S., Diakaki, M., Domingo-Pardo, C., Dressler, R., Duran, I., Eleftheriadis, C., Ferrari, A., Fraval, K., Furman, V., Göbel, K., Gomez-Hornillos, M. B., Ganesan, S., Garcia, A. R., Giubrone, G., Goncalves, I. F., Gonzalez-Romero, E., Goverdovski, A., Griesmayer, E., Guerrero, C., Gunsing, F., Heftrich, T., Hernandez-Prieto, A., Jericha, E., Käppeler, F., Kadi, Y., Karadimos, D., Katabuchi, T., Ketlerov, V., Khryachkov, V., Kivel, N., Kokkoris, M., Kroll, J., Lampoudis, C., Langer, C., Leal-Cidoncha, E., Lederer, C., Leeb, H., Leong, L. S., Losito, R., Lugaro, M., Mallick, A., Manousos, A., Marganiec, J., Martinez, T., Mastinu, P., Mastromarco, M., Mendoza, E., Mingrone, F., Mirea, M., Paradela, C., Pavlik, A., Perkowski, J., Praena, J., Quesada, J. M., Rauscher, T., Reifarth, R., Riego-Perez, A., Robles, M., Rubbia, C., Ryan, J. A., Sabate-Gilarte, M., Sarmento, R., Saxena, A., Schmidt, S., Schumann, D., Sedyshev, P., Tain, J. L., Tarifeno-Saldivia, A., Tarrio, D., Tassan-Got, L., Tsinganis, A., Vannini, G., Variale, V., Vaz, P., Ventura, A., Vermeulen, M. J., Vescovi, D., Vlachoudis, V., Vlastou, R., Wallner, A., Ware, T., Weigand, M., Weiss, C., Wright, T., Zugec, P., and Krtička, M.

Abstract

Background: Stellar nucleosynthesis of elements heavier than iron is driven by neutron capture processes. 92Zr is positioned at a strategic point along the slow nucleosynthesis path, given its proximity to the neutron magic number N=50 and its position at the matching region between the weak and main slow processes. Purpose: In parallel with recent improved astronomical data, the extraction of accurate Maxwellian averaged cross sections (MACSs) derived from a more complete and accurate set of resonance parameters should allow for a better understanding of the stellar conditions at which nucleosynthesis takes place. Methods: Transmission and capture cross section measurements using enriched 92Zr metallic samples were performed at the time-of flight facilities GELINA of JRC-Geel (BE) and n_TOF of CERN (CH). The neutron beam passing through the samples was investigated in transmission measurements at GELINA using a Li-glass scintillator. The γ rays emitted during the neutron capture reactions were detected by C6D6 detectors at both GELINA and n_TOF. Results: Resonance parameters of individual resonances up to 81 keV were extracted from a combined resonance shape analysis of experimental transmissions and capture yields. For the majority of the resonances the parity was determined from an analysis of the transmission data obtained with different sample thicknesses. Average resonance parameters were calculated. Conclusions: Maxwellian averaged cross sections were extracted from resonances observed up to 81 keV. The MACS for kT=30keV is fully consistent with experimental data reported in the literature. The MACSs for kT≲15keV are in good agreement with those derived from the ENDF/B-VIII.0 library and recommended in the KADoNiS database. For kT higher than 30 keV differences are observed. A comparison with MACSs obtained with the cross sections recommended in the JEFF-3.3 and JENDL-4.0 libraries shows discrepancies even for kT≲15keV.

Published
2022

30. Measurement of the 76Ge(n, γ) cross section at the n_TOF facility at CERN

Author

Gawlik-Ramiega A., Lederer-Woods C., Krticka M., Valenta S., Battino U., Andrzejewski J., Perkowski J., Aberle O., Audouin L., Bacak M., Balibrea J., Barbagallo M., Barros S., Becares V., Becvar F., Beinrucker C., Berthoumieux E., Billowes J., Bosnar D., Brugger M., Caamano M., Calvino F., Calviani M., Cano-Ott D., Cardella R., Casanovas A., Castelluccio D. M., Cerutti F., Chen Y. H., Chiaveri E., Colonna N., Cortes G., Cortes-Giraldo M. A., Cosentino L., Damone L. A., Diakaki M., Dietz M., Domingo-Pardo C., Dressler R., Dupont E., Duran I., Fernandez-Dominguez B., Ferrari A., Ferreira P., Finocchiaro P., Furman V., Gobel K., Garcia A. R., Glodariu T., Goncalves I. F., Gonzalez-Romero E., Goverdovski A., Griesmayer E., Guerrero C., Gunsing F., Harada H., Heftrich T., Heinitz S., Heyse J., Jenkins D. G., Jericha E., Kappeler F., Kadi Y., Katabuchi T., Kavrigin P., Ketlerov V., Khryachkov V., Kimura A., Kivel N., Knapova I., Kokkoris M., Leal-Cidoncha E., Leeb H., Lerendegui-Marco J., Lo Meo S., Lonsdale S. J., Losito R., Macina D., Martinez T., Massimi C., Mastinu P., Mastromarco M., Matteucci F., Maugeri E. A., Mendoza E., Mengoni A., Milazzo P. M., Mingrone F., Mirea M., Montesano S., Musumarra A., Nolte R., Oprea A., Patronis N., Pavlik A., Porras J. I., Praena J., Quesada J. M., Rajeev K., Rauscher T., Reifarth R., Riego-Perez A., Rout P. C., Rubbia C., Ryan J. A., Sabate-Gilarte M., Saxena A., Schillebeeckx P., Schmidt S., Schumann D., Sedyshev P., Smith A. G., Stamatopoulos A., Tagliente G., Tain J. L., Tarifeno-Saldivia A., Tassan-Got L., Tattersall A., Tsinganis A., Vannini G., Variale V., Vaz P., Ventura A., Vlachoudis V., Vlastou R., Wallner A., Warren S., Weigand M., Weiss C., Wolf C., Woods P. J., Wright T., Zugec P., Gawlik-Ramiega A., Lederer-Woods C., Krticka M., Valenta S., Battino U., Andrzejewski J., Perkowski J., Aberle O., Audouin L., Bacak M., Balibrea J., Barbagallo M., Barros S., Becares V., Becvar F., Beinrucker C., Berthoumieux E., Billowes J., Bosnar D., Brugger M., Caamano M., Calvino F., Calviani M., Cano-Ott D., Cardella R., Casanovas A., Castelluccio D.M., Cerutti F., Chen Y.H., Chiaveri E., Colonna N., Cortes G., Cortes-Giraldo M.A., Cosentino L., Damone L.A., Diakaki M., Dietz M., Domingo-Pardo C., Dressler R., Dupont E., Duran I., Fernandez-Dominguez B., Ferrari A., Ferreira P., Finocchiaro P., Furman V., Gobel K., Garcia A.R., Glodariu T., Goncalves I.F., Gonzalez-Romero E., Goverdovski A., Griesmayer E., Guerrero C., Gunsing F., Harada H., Heftrich T., Heinitz S., Heyse J., Jenkins D.G., Jericha E., Kappeler F., Kadi Y., Katabuchi T., Kavrigin P., Ketlerov V., Khryachkov V., Kimura A., Kivel N., Knapova I., Kokkoris M., Leal-Cidoncha E., Leeb H., Lerendegui-Marco J., Lo Meo S., Lonsdale S.J., Losito R., Macina D., Martinez T., Massimi C., Mastinu P., Mastromarco M., Matteucci F., Maugeri E.A., Mendoza E., Mengoni A., Milazzo P.M., Mingrone F., Mirea M., Montesano S., Musumarra A., Nolte R., Oprea A., Patronis N., Pavlik A., Porras J.I., Praena J., Quesada J.M., Rajeev K., Rauscher T., Reifarth R., Riego-Perez A., Rout P.C., Rubbia C., Ryan J.A., Sabate-Gilarte M., Saxena A., Schillebeeckx P., Schmidt S., Schumann D., Sedyshev P., Smith A.G., Stamatopoulos A., Tagliente G., Tain J.L., Tarifeno-Saldivia A., Tassan-Got L., Tattersall A., Tsinganis A., Vannini G., Variale V., Vaz P., Ventura A., Vlachoudis V., Vlastou R., Wallner A., Warren S., Weigand M., Weiss C., Wolf C., Woods P.J., Wright T., and Zugec P.

Subjects
Physics::Instrumentation and Detectors, Astrophysics::High Energy Astrophysical Phenomena, s process, stellar nuceosinthesys, TOF, Nuclear Experiment
Abstract

The 76Ge(n, γ ) reaction has been measured at the n_TOF facility at CERN via the time-of-flight technique. Neutron capture cross sections on 76Ge are of interest to a variety of low-background experiments, such as neutrinoless double β decay searches, and to nuclear astrophysics. We have determined resonance capture kernels up to 52 keV neutron energy and used the new data to calculate Maxwellian-averaged neutron capture cross sections for kBT values of 5 to 100 keV.

Published
2021

31. Measurement of the Ge76(n,γ) cross section at the n_TOF facility at CERN

Author

M. A. Cortés-Giraldo, V. Bécares, A. Pavlik, C. Domingo-Pardo, D. Cano-Ott, F. Cerutti, M. Diakaki, M. Sabaté-Gilarte, Y. Kadi, A. Gawlik-Ramięga, G. Vannini, F. Bečvář, M. Caamaño, N. Colonna, C. Weiss, A. Oprea, Rugard Dressler, C. Wolf, E. Mendoza, G. Cortes, I. Knapova, S. Valenta, P. Vaz, A. Tsinganis, Peter Schillebeeckx, E. Leal-Cidoncha, Marco Calviani, Y. H. Chen, A. G. Smith, M. Mirea, Javier Praena, S. Lo Meo, Vasilis Vlachoudis, D. Bosnar, Claudia Lederer-Woods, Philip Woods, V. Khryachkov, L. Cosentino, D. G. Jenkins, P. M. Milazzo, O. Aberle, A. Kimura, F. Calviño, H. Leeb, J. Perkowski, P. V. Sedyshev, M. Bacak, R. Cardella, K. Rajeev, A. Musumarra, J. I. Porras, T. Glodariu, Thomas Rauscher, B. Fernández-Domínguez, F. Käppeler, Roberto Losito, Francesca Matteucci, S. Montesano, D. M. Castelluccio, S. Warren, Tanja Heftrich, Kathrin Göbel, V. Furman, T. J. Wright, G. Tagliente, E. Chiaveri, C. Rubbia, A. Stamatopoulos, A. Tattersall, A. Riego-Perez, P. F. Mastinu, V. Variale, Tatsuya Katabuchi, A. Ventura, Pedro G. Ferreira, Mario Weigand, S. Heinitz, J. Andrzejewski, A. Casanovas, D. Macina, Jan Heyse, Carlos Guerrero, J. L. Tain, P. C. Rout, Petar Žugec, Niko Kivel, F. Gunsing, E. Jericha, Emilio Andrea Maugeri, S. Barros, F. Mingrone, Paolo Finocchiaro, M. Krtička, Ariel Tarifeño-Saldivia, S. J. Lonsdale, Dorothea Schumann, Cristian Massimi, J. Lerendegui-Marco, P. Kavrigin, J. A. Ryan, T. Martinez, Rene Reifarth, L. Audouin, I. F. Gonçalves, M. Kokkoris, E. González-Romero, Stefan Schmidt, Ralf Nolte, A. Goverdovski, J. M. Quesada, L. Tassan-Got, A. Mengoni, E. Griesmayer, U. Battino, R. Vlastou, L. A. Damone, E. Berthoumieux, N. Patronis, A. K. Saxena, Arnaud Ferrari, V. Ketlerov, J. Billowes, I. Duran, A. R. García, M. Brugger, C. Beinrucker, E. Dupont, M. Dietz, M. Mastromarco, Massimo Barbagallo, Anton Wallner, J. Balibrea, and Hideo Harada

Subjects
Croatian, Physics, Czech, 010308 nuclear & particles physics, European research, 0103 physical sciences, language, Library science, 010306 general physics, 01 natural sciences, language.human_language
Abstract

This work was supported by the Austrian Science Fund FWF (J3503), the Adolf Messer Foundation (Germany), the UK Science and Facilities Council (ST/M006085/1), and the European Research Council ERC-2015-StG No. 677497. We also acknowledge support of Narodowe Centrum Nauki (NCN) under the grant (UMO-2016/22/M/ST2/00183) and University of Lodz under the grant (9/IDUB/MLOD/2021), MEYS of the Czech Republic, the Charles University project UNCE/SCI/013, and the Croatian Science Foundation under the project IP-2018-01-8570.

Published
2021

32. Measurement of the Ge 70 (n,γ) cross section up to 300 keV at the CERN n-TOF facility

Author

Gawlik A., Lederer-Woods C., Andrzejewski J., Battino U., Ferreira P., Gunsing F., Heinitz S., Krticka M., Massimi C., Mingrone F., Perkowski J., Reifarth R., Tattersall A., Valenta S., Weiss C., Aberle O., Audouin L., Bacak M., Balibrea J., Barbagallo M., Barros S., Becares V., Becvar F., Beinrucker C., Berthoumieux E., Billowes J., Bosnar D., Brugger M., Caamano M., Calvino F., Calviani M., Cano-Ott D., Cardella R., Casanovas A., Castelluccio D. M., Cerutti F., Chen Y. H., Chiaveri E., Colonna N., Cortes G., Cortes-Giraldo M. A., Cosentino L., Damone L. A., Diakaki M., Dietz M., Domingo-Pardo C., Dressler R., Dupont E., Duran I., Fernandez-Dominguez B., Ferrari A., Finocchiaro P., Furman V., Gobel K., Garcia A. R., Glodariu T., Goncalves I. F., Gonzalez-Romero E., Goverdovski A., Griesmayer E., Guerrero C., Harada H., Heftrich T., Heyse J., Jenkins D. G., Jericha E., Kappeler F., Kadi Y., Katabuchi T., Kavrigin P., Ketlerov V., Khryachkov V., Kimura A., Kivel N., Knapova I., Kokkoris M., Leal-Cidoncha E., Leeb H., Lerendegui-Marco J., Lo Meo S., Lonsdale S. J., Losito R., MacIna D., Marganiec J., Martinez T., Mastinu P., Mastromarco M., Matteucci F., Maugeri E. A., Mendoza E., Mengoni A., Milazzo P. M., Mirea M., Montesano S., Musumarra A., Nolte R., Oprea A., Patronis N., Pavlik A., Porras J. I., Praena J., Quesada J. M., Rajeev K., Rauscher T., Riego-Perez A., Rout P. C., Rubbia C., Ryan J. A., Sabate-Gilarte M., Saxena A., Schillebeeckx P., Schmidt S., Schumann D., Sedyshev P., Smith A. G., Stamatopoulos A., Tagliente G., Tain J. L., Tarifeno-Saldivia A., Tassan-Got L., Tsinganis A., Vannini G., Variale V., Vaz P., Ventura A., Vlachoudis V., Vlastou R., Wallner A., Warren S., Weigand M., Wolf C., Woods P. J., Wright T., Zugec P., Gawlik A., Lederer-Woods C., Andrzejewski J., Battino U., Ferreira P., Gunsing F., Heinitz S., Krticka M., Massimi C., Mingrone F., Perkowski J., Reifarth R., Tattersall A., Valenta S., Weiss C., Aberle O., Audouin L., Bacak M., Balibrea J., Barbagallo M., Barros S., Becares V., Becvar F., Beinrucker C., Berthoumieux E., Billowes J., Bosnar D., Brugger M., Caamano M., Calvino F., Calviani M., Cano-Ott D., Cardella R., Casanovas A., Castelluccio D.M., Cerutti F., Chen Y.H., Chiaveri E., Colonna N., Cortes G., Cortes-Giraldo M.A., Cosentino L., Damone L.A., Diakaki M., Dietz M., Domingo-Pardo C., Dressler R., Dupont E., Duran I., Fernandez-Dominguez B., Ferrari A., Finocchiaro P., Furman V., Gobel K., Garcia A.R., Glodariu T., Goncalves I.F., Gonzalez-Romero E., Goverdovski A., Griesmayer E., Guerrero C., Harada H., Heftrich T., Heyse J., Jenkins D.G., Jericha E., Kappeler F., Kadi Y., Katabuchi T., Kavrigin P., Ketlerov V., Khryachkov V., Kimura A., Kivel N., Knapova I., Kokkoris M., Leal-Cidoncha E., Leeb H., Lerendegui-Marco J., Lo Meo S., Lonsdale S.J., Losito R., MacIna D., Marganiec J., Martinez T., Mastinu P., Mastromarco M., Matteucci F., Maugeri E.A., Mendoza E., Mengoni A., Milazzo P.M., Mirea M., Montesano S., Musumarra A., Nolte R., Oprea A., Patronis N., Pavlik A., Porras J.I., Praena J., Quesada J.M., Rajeev K., Rauscher T., Riego-Perez A., Rout P.C., Rubbia C., Ryan J.A., Sabate-Gilarte M., Saxena A., Schillebeeckx P., Schmidt S., Schumann D., Sedyshev P., Smith A.G., Stamatopoulos A., Tagliente G., Tain J.L., Tarifeno-Saldivia A., Tassan-Got L., Tsinganis A., Vannini G., Variale V., Vaz P., Ventura A., Vlachoudis V., Vlastou R., Wallner A., Warren S., Weigand M., Wolf C., Woods P.J., Wright T., Zugec P., Gawlik, A., Lederer-Woods, C., Andrzejewski, J., Battino, U., Ferreira, P., Gunsing, F., Heinitz, S., Krticka, M., Massimi, C., Mingrone, F., Perkowski, J., Reifarth, R., Tattersall, A., Valenta, S., Weiss, C., Aberle, O., Audouin, L., Bacak, M., Balibrea, J., Barbagallo, M., Barros, S., Becares, V., Becvar, F., Beinrucker, C., Berthoumieux, E., Billowes, J., Bosnar, D., Brugger, M., Caamano, M., Calvino, F., Calviani, M., Cano-Ott, D., Cardella, R., Casanovas, A., Castelluccio, D. M., Cerutti, F., Chen, Y. H., Chiaveri, E., Colonna, N., Cortes, G., Cortes-Giraldo, M. A., Cosentino, L., Damone, L. A., Diakaki, M., Dietz, M., Domingo-Pardo, C., Dressler, R., Dupont, E., Duran, I., Fernandez-Dominguez, B., Ferrari, A., Finocchiaro, P., Furman, V., Gobel, K., Garcia, A. R., Glodariu, T., Goncalves, I. F., Gonzalez-Romero, E., Goverdovski, A., Griesmayer, E., Guerrero, C., Harada, H., Heftrich, T., Heyse, J., Jenkins, D. G., Jericha, E., Kappeler, F., Kadi, Y., Katabuchi, T., Kavrigin, P., Ketlerov, V., Khryachkov, V., Kimura, A., Kivel, N., Knapova, I., Kokkoris, M., Leal-Cidoncha, E., Leeb, H., Lerendegui-Marco, J., Lo Meo, S., Lonsdale, S. J., Losito, R., Macina, D., Marganiec, J., Martinez, T., Mastinu, P., Mastromarco, M., Matteucci, F., Maugeri, E. A., Mendoza, E., Mengoni, A., Milazzo, P. M., Mirea, M., Montesano, S., Musumarra, A., Nolte, R., Oprea, A., Patronis, N., Pavlik, A., Porras, J. I., Praena, J., Quesada, J. M., Rajeev, K., Rauscher, T., Riego-Perez, A., Rout, P. C., Rubbia, C., Ryan, J. A., Sabate-Gilarte, M., Saxena, A., Schillebeeckx, P., Schmidt, S., Schumann, D., Sedyshev, P., Smith, A. G., Stamatopoulos, A., Tagliente, G., Tain, J. L., Tarifeno-Saldivia, A., Tassan-Got, L., Tsinganis, A., Vannini, G., Variale, V., Vaz, P., Ventura, A., Vlachoudis, V., Vlastou, R., Wallner, A., Warren, S., Weigand, M., Wolf, C., Woods, P. J., Wright, T., and Zugec, P.

Subjects
Astrophysics::High Energy Astrophysical Phenomena, s process TOF neutron cross section, Astrophysics::Solar and Stellar Astrophysics, Nuclear Experiment
Abstract

Neutron capture data on intermediate mass nuclei are of key importance to nucleosynthesis in the weak component of the slow neutron capture processes, which occurs in massive stars. The (n,γ) cross section on Ge70, which is mainly produced in the s process, was measured at the neutron time-of-flight facility n-TOF at CERN. Resonance capture kernels were determined up to 40 keV neutron energy and average cross sections up to 300 keV. Stellar cross sections were calculated from kT=5 keV to kT=100 keV and are in very good agreement with a previous measurement by Walter and Beer (1985) and recent evaluations. Average cross sections are in agreement with Walter and Beer (1985) over most of the neutron energy range covered, while they are systematically smaller for neutron energies above 150 keV. We have calculated isotopic abundances produced in s-process environments in a 25 solar mass star for two initial metallicities (below solar and close to solar). While the low metallicity model reproduces best the solar system germanium isotopic abundances, the close to solar model shows a good global match to solar system abundances in the range of mass numbers A=60-80.

Published
2019

33. Measurement of the $^{76}\mathrm{Ge}(n,{\gamma})$ cross section at the n_TOF facility at CERN

Author

Gawlik-Ramięga, A., Lederer-Woods, C., Krtička, M., Valenta, S., Battino, U., Andrzejewski, J., Perkowski, J., Aberle, O., Audouin, L., Bacak, M., Balibrea, J., Barbagallo, M., Barros, S., Bécares, V., Bečvář, F., Beinrucker, C., Berthoumieux, E., Billowes, J., Bosnar, D., Brugger, M., Caamaño, M., Calviño, F., Calviani, M., Cano-Ott, D., Cardella, R., Casanovas, A., Castelluccio, D.M., Cerutti, F., Chen, Y.H., Chiaveri, E., Colonna, N., Cortés, G., Cortés-Giraldo, M.A., Cosentino, L., Damone, L.A., Diakaki, M., Dietz, M., Domingo-Pardo, C., Dressler, R., Dupont, E., Durán, I., Fernández-Domínguez, B., Ferrari, A., Ferreira, P., Finocchiaro, P., Furman, V., Göbel, K., García, A.R., Glodariu, T., Gonçalves, I.F., González-Romero, E., Goverdovski, A., Griesmayer, E., Guerrero, C., Gunsing, F., Harada, H., Heftrich, T., Heinitz, S., Heyse, J., Jenkins, D.G., Jericha, E., Käppeler, F., Kadi, Y., Katabuchi, T., Kavrigin, P., Ketlerov, V., Khryachkov, V., Kimura, A., Kivel, N., Knapová, I., Kokkoris, M., Leal-Cidoncha, E., Leeb, H., Lerendegui-Marco, J., Lo Meo, S., Lonsdale, S.J., Losito, R., Macina, D., Martínez, T., Massimi, C., Mastinu, P., Mastromarco, M., Matteucci, F., Maugeri, E.a., Mendoza, E., Mengoni, A., Milazzo, P.M., Mingrone, F., Mirea, M., Montesano, S., Musumarra, A., Nolte, R., Oprea, A., Patronis, N., Pavlik, A., Porras, J.I., Praena, J., Quesada, J.M., Rajeev, K., Rauscher, T., Reifarth, R., Riego-Perez, A., Rout, P.C., Rubbia, C., Ryan, J.A., Sabaté-Gilarte, M., Saxena, A., Schillebeeckx, P., Schmidt, S., Schumann, D., Sedyshev, P., Smith, A.G., Stamatopoulos, A., Tagliente, G., Tain, J.L., Tarifeño-Saldivia, A., Tassan-Got, L., Tattersall, A., Tsinganis, A., Vannini, G., Variale, V., Vaz, P., Ventura, A., Vlachoudis, V., Vlastou, R., Wallner, A., Warren, S., Weigand, M., Weiss, C., Wolf, C., Woods, P.J., Wright, T., Žugec, P., 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, 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
Physics in General, Astrophysics::High Energy Astrophysical Phenomena, Nuclear Experiment, [PHYS.PHYS.PHYS-GEN-PH]Physics [physics]/Physics [physics]/General Physics [physics.gen-ph]
Abstract

International audience; The $^{76}\mathrm{Ge}(n,{\gamma})$ reaction has been measured at the n_TOF facility at CERN via the time-of-flight technique. Neutron capture cross sections on $^{76}$Ge are of interest to a variety of low-background experiments, such as neutrinoless double β decay searches, and to nuclear astrophysics. We have determined resonance capture kernels up to 52 keV neutron energy and used the new data to calculate Maxwellian-averaged neutron capture cross sections for kBT values of 5 to 100 keV.

Published
2021

34. Measurement of the cross section at the n_TOF facility at CERN

Author

N_TOF Collaboration, Gawlik-Rami��ga, A., Lederer-Woods, C., Krti��ka, M., Valenta, S., Battino, U., Andrzejewski, J., Perkowski, J., Aberle, O., Audouin, L., Bacak, M., Balibrea, J., Barbagallo, M., Barros, S., B��cares, V., Be��v����, F., Beinrucker, C., Berthoumieux, E., Billowes, J., Bosnar, D., Brugger, M., Caama��o, M., Calvi��o, F., Calviani, M., Cano-Ott, D., Cardella, R., Casanovas, A., Castelluccio, D. M., Cerutti, F., Chen, Y. H., Chiaveri, E., Colonna, N., Cort��s, G., Cort��s-Giraldo, M. A., Cosentino, L., Damone, L. A., Diakaki, M., Dietz, M., Domingo-Pardo, C., Dressler, R., Dupont, E., Dur��n, I., Fern��ndez-Dom��nguez, B., Ferrari, A., Ferreira, P., Finocchiaro, P., Furman, V., G��bel, K., Garc��a, A. R., Glodariu, T., Gon��alves, I. F., Gonz��lez-Romero, E., Goverdovski, A., Griesmayer, E., Guerrero, C., Gunsing, F., Harada, H., Heftrich, T., Heinitz, S., Heyse, J., Jenkins, D. G., Jericha, E., K��ppeler, F., Kadi, Y., Katabuchi, T., Kavrigin, P., Ketlerov, V., Khryachkov, V., Kimura, A., Kivel, N., Knapov��, I., Kokkoris, M., Leal-Cidoncha, E., Leeb, H., Lerendegui-Marco, J., Lo Meo, S., Lonsdale, S. J., Losito, R., Macina, D., Mart��nez, T., Massimi, C., Mastinu, P., Mastromarco, M., Matteucci, F., Maugeri, E. A., Mendoza, E., Mengoni, A., Milazzo, P. M., Mingrone, F., Mirea, M., Montesano, S., Musumarra, A., Nolte, R., Oprea, A., Patronis, N., Pavlik, A., Porras, J. I., Praena, J., Quesada, J. M., Rajeev, K., Rauscher, T., Reifarth, R., Riego-Perez, A., Rout, P. C., Rubbia, C., Ryan, J. A., Sabat��-Gilarte, M., Saxena, A., Schillebeeckx, P., Schmidt, S., Schumann, D., Sedyshev, P., Smith, A. G., Stamatopoulos, A., Tagliente, G., Tain, J. L., Tarife��o-Saldivia, A., Tassan-Got, L., Tattersall, A., Tsinganis, A., Vannini, G., Variale, V., Vaz, P., Ventura, A., Vlachoudis, V., Vlastou, R., Wallner, A., Warren, S., Weigand, M., Weiss, C., Wolf, C., Woods, P. J., Wright, T., and ��ugec, P.

Subjects
Physics, ddc:530
Published
2021

35. Measurement of the cross section at the n_TOF facility at CERN

Author

Gawlik-Ramiega, A., Lederer-Woods, C., Krticka, M., Valenta, S., Battino, U., Andrzejewski, J., Perkowski, J., Aberle, O., Audouin, L., Bacak, M., Balibrea, J., Barbagallo, M., Barros, S., Becares, V., Becvar, F., Beinrucker, C., Berthoumieux, E., Billowes, J., Bosnar, D., Brugger, M., Caamano, M., Calvino, F., Calviani, M., Cano-Ott, D., Cardella, R., Casanovas, A., Castelluccio, D. M., Cerutti, F., Chen, Y. H., Chiaveri, E., Colonna, N., Cortes, G., Cortes-Giraldo, M. A., Cosentino, L., Damone, L. A., Diakaki, M., Dietz, M., Domingo-Pardo, C., Dressler, R., Dupont, E., Duran, I., Fernandez-Dominguez, B., Ferrari, A., Ferreira, P., Finocchiaro, P., Furman, V., Gobel, K., Garcia, A. R., Glodariu, T., Goncalves, I. F., Gonzalez-Romero, E., Goverdovski, A., Griesmayer, E., Guerrero, C., Gunsing, F., Harada, H., Heftrich, T., Heinitz, S., Heyse, J., Jenkins, D. G., Jericha, E., Kappeler, F., Kadi, Y., Katabuchi, T., Kavrigin, P., Ketlerov, V., Khryachkov, V., Kimura, A., Kivel, N., Knapova, I., Kokkoris, M., Leal-Cidoncha, E., Leeb, H., Lerendegui-Marco, J., Lo Meo, S., Lonsdale, S. J., Losito, R., Macina, D., Martinez, T., Massimi, C., Mastinu, P., Mastromarco, M., Matteucci, F., Maugeri, E. A., Mendoza, E., Mengoni, A., Milazzo, P. M., Mingrone, F., Mirea, M., Montesano, S., Musumarra, A., Nolte, R., Oprea, A., Patronis, N., Pavlik, A., Porras, J. I., Praena, J., Quesada, J. M., Rajeev, K., Rauscher, T., Reifarth, R., Riego-Perez, A., Rout, P. C., Rubbia, C., Ryan, J. A., Sabate-Gilarte, M., Saxena, A., Schillebeeckx, P., Schmidt, S., Schumann, D., Sedyshev, P., Smith, A. G., Stamatopoulos, A., Tagliente, G., Tain, J. L., Tarifeno-Saldivia, A., Tassan-Got, L., Tattersall, A., Tsinganis, A., Vannini, G., Variale, V., Vaz, P., Ventura, A., Vlachoudis, V., Vlastou, R., Wallner, A., Warren, S., Weigand, M., Weiss, C., Wolf, C., Woods, P. J., Wright, T., and Zugec, P.

Published
2021

36. Radiative Neutron Capture Cross-Section Measurement of Ge Isotopes at n_TOF CERN Facility and Its Importance for Stellar Nucleosynthesis

Author

M. Bacak, A. Musumarra, P. J. Woods, T. Glodariu, N. Patronis, A. Pavlik, Roberto Losito, Rene Reifarth, Stefan Schmidt, Cortés-Giraldo, J. M. Quesada, L. Tassan-Got, Tanja Heftrich, A. Riego-Perez, S.L. Meo, A. K. Saxena, Arnaud Ferrari, C. Domingo-Pardo, L. Audouin, G. Vannini, P. C. Rout, L. Cosentino, E. Dupont, J. Billowes, S. Montesano, Tatsuya Katabuchi, A. Stamatopoulos, S. Barros, A. Mengoni, K. Rajeev, M. Caamaño, Petar Žugec, A. Kimura, Rugard Dressler, Francesca Matteucci, D. G. Jenkins, Emilio Andrea Maugeri, A. Tsinganis, P. Kavrigin, Nicola Colonna, M. Kokkoris, Mario Barbagallo, A. Oprea, Vasilis Vlachoudis, I. Knapova, V. Ketlerov, G. Tagliente, G. Cortes, Ralf Nolte, P. Vaz, B. Fernández-Domínguez, F. Käppeler, E. Griesmayer, Kathrin Göbel, Alberto Ventura, A. Casanovas, A. Goverdovski, O. Aberle, L. A. Damone, D. Bosnar, Jan Heyse, J. I. Porras, A. R. García, U. Battino, M. Brugger, A. Tattersall, V. Furman, T. J. Wright, F. Cerutti, C. Beinrucker, R. Vlastou, I. Duran, E. Leal-Cidoncha, E. Berthoumieux, A. Gawlik, Thomas Rauscher, D. Cano-Ott, M. Diakaki, E. González-Romero, R. Cardella, Javier Praena, F. Bečvář, C. Wolf, E. Mendoza, Peter Schillebeeckx, V. Bécares, E. Jericha, Paolo Finocchiaro, F. Gunsing, Dorothea Schumann, J. A. Ryan, Cristian Massimi, Pedro G. Ferreira, Mario Weigand, M. Krtička, M. Mirea, F. Calviño, H. Leeb, J. Perkowski, T. Martinez, Ariel Tarifeño-Saldivia, S. J. Lonsdale, J. Lerendegui-Marco, S. Heinitz, V. Khryachkov, E. Chiaveri, P. F. Mastinu, P. M. Milazzo, Y. H. Chen, I. F. Gonçalves, M. Sabaté-Gilarte, S. Warren, V. Variale, M. Mastromarco, Anton Wallner, J. Balibrea, D. M. Castelluccio, Hideo Harada, D. Macina, Carlos Guerrero, Claudia Lederer-Woods, P. V. Sedyshev, F. Mingrone, J. Andrzejewski, C. Rubbia, J. L. Tain, Niko Kivel, C. Weiss, Y. Kadi, S. Valenta, Marco Calviani, A. G. Smith, M. Dietz, 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, 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), Universitat Politècnica de Catalunya. Departament de Física, and Universitat Politècnica de Catalunya. ANT - Advanced Nuclear Technologies Research Group

Subjects
Astrofísica, Astrophysics and Astronomy, Isotopes of germanium, Astrophysics::High Energy Astrophysical Phenomena, General Physics and Astronomy, chemistry.chemical_element, Germanium, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Astrophysics, 7. Clean energy, Nuclear physics, Stellar nucleosynthesis, Isotopes, Nucleosynthesis, CERN, Neutron cross section, Neutron, Nuclear Physics - Experiment, n_TOF, Nuclear Experiment, Stellar activity, Physics, Física [Àrees temàtiques de la UPC], Neutron temperature, Neutron capture cross-section, Neutron capture, Activitat estelar, chemistry, Neutron time-of-flight, MACS, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], radiative neutron capture, Ge isotopes, n_TOF, stellar nucleosynthesis
Abstract

This work was supported by the Austrian Science Fund FWF (J3503), the Adolf Messer Foundation (Germany), the UK Science and Facilities Council (ST/M006085/1), and the European Research Council ERC-2015-StG No. 677497. We also acknowledge the support of the National Science Centre, Poland, under the grant UMO-2016/22/M/ST2/00183, the MSMT of the Czech Republic and the Croatian Science Foundation under the project IP-2018-01-8570., This manuscript summarizes the results of radiative neutron capture cross-section measurements on two stable germanium isotopes, Ge-70 and Ge-73. Experiments were performed at the n_TOF facility at CERN via the time-of-flight technique, over a wide neutron energy range, for all stable germanium isotopes (70,72,73,74, and 76). Results for Ge-70 [Phys. Rev. C 100, 045804 (2019)] and Ge-73 [Phys. Lett. B 790, 458 (2019)] are already published. In the field of nuclear structure, such measurements allow to study excited levels close to the neutron binding energy and to obtain information on nuclear properties. In stellar nucleosynthesis research, neutron induced reactions on germanium are of importance for nucleosynthesis in the weak component of the slow neutron capture processes., Austrian Science Fund (FWF) J3503, Adolf Messer Foundation (Germany), UK Science and Facilities Council ST/M006085/1, European Research Council (ERC), European Commission 677497, National Science Centre, Poland UMO-2016/22/M/ST2/00183, Ministry of Education, Youth & Sports - Czech Republic, Croatian Science Foundation IP-2018-01-8570

Published
2021
Full Text
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37. Measurement of the Ge-76(n, gamma) cross section at the n_TOF facility at CERN

Author

Gawlik-Ramiega, A., Lederer-Woods, C., Krticka, M., Valenta, S., Battino, U., Andrzejewski, J., Perkowski, J., Aberle, O., Audouin, L., Bacak, M., Balibrea, J., Barbagallo, M., Barros, S., Becares, V., Becvar, F., Beinrucker, C., Berthoumieux, E., Billowes, J., Bosnar, D., Brugger, M., Caamano, M., Calvino, F., Calviani, M., Cano-Ott, D., Cardella, R., Casanovas, A., Castelluccio, D. M., Cerutti, F., Chen, Y. H., Chiaveri, E., Colonna, N., Cortes, G., Cortes-Giraldo, M. A., Cosentino, L., Damone, L. A., Diakaki, M., Dietz, M., Domingo-Pardo, C., Dressler, R., Dupont, E., Duran, I., Fernandez-Dominguez, B., Ferrari, A., Ferreira, P., Finocchiaro, P., Furman, V., Goebel, K., Garcia, A. R., Glodariu, T., Goncalves, I. F., Gonzalez-Romero, E., Goverdovski, A., Griesmayer, E., Guerrero, C., Gunsing, F., Harada, H., Heftrich, T., Heinitz, S., Heyse, J., Jenkins, D. G., Jericha, E., Kaeppeler, F., Kadi, Y., Katabuchi, T., Kavrigin, P., Ketlerov, V., Khryachkov, V., Kimura, A., Kivel, N., Knapova, I., Kokkoris, M., Leal-Cidoncha, E., Leeb, H., Lerendegui-Marco, J., Lo Meo, S., Lonsdale, S. J., Losito, R., Macina, D., Martinez, T., Massimi, C., Mastinu, P., Mastromarco, M., Matteucci, F., Maugeri, E. A., Mendoza, E., Mengoni, A., Milazzo, P. M., Mingrone, F., Mirea, M., Montesano, S., Musumarra, A., Nolte, R., Oprea, A., Patronis, N., Pavlik, A., Porras, J., Praena, J., Quesada, J. M., Rajeev, K., Rauscher, T., Reifarth, R., Riego-Perez, A., Rout, P. C., Rubbia, C., Ryan, J. A., Sabate-Gilarte, M., Saxena, A., Schillebeeckx, P., Schmidt, S., Schumann, D., Sedyshev, P., Smith, A. G., Stamatopoulos, A., Tagliente, G., Tain, J. L., Tarifeno-Saldivia, A., Tassan-Got, L., Tattersall, A., Tsinganis, A., Vannini, G., Variale, V., Vaz, P., Ventura, A., Vlachoudis, V., Vlastou, R., Wallner, A., Warren, S., Weigand, M., Weiss, C., Wolf, C., Woods, P. J., Wright, T., and Zugec, P.

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

The Ge-76(n, gamma) reaction has been measured at the n_TOF facility at CERN via the time-of-flight technique. Neutron capture cross sections on Ge-76 are of interest to a variety of low-background experiments, such as neutrinoless double beta decay searches, and to nuclear astrophysics. We have determined resonance capture kernels up to 52 keV neutron energy and used the new data to calculate Maxwellian-averaged neutron capture cross sections for k(B)T values of 5 to 100 keV.

Published
2021

38. $^{7}$ Be(n,p)$^{7}$ Li Cross Section Measurement for the Cosmological Lithium Problem at the n $\_$ TOF Facility at CERN

Author

M.J.G. Borge, D. M. Castelluccio, Rene Reifarth, A. Kimura, Stefan Schmidt, Srinivasan Ganesan, D. Macina, Carlos Guerrero, Cortés-Giraldo, G. Bellia, J. M. Quesada, L. Tassan-Got, P. J. Woods, Ignacio Porras, Sergio Cristallo, I. Duran, A. Mengoni, V. Bcares, Alexandru Negret, Juliana Schell, A. Casanovas, K. Rajeev, A. K. Saxena, Tatsuya Katabuchi, A. Ventura, J. Lerendegui-Marco, Maurizio Busso, M. Piscopo, Ariel Tarifeño-Saldivia, S. J. Lonsdale, B. Fernández-Domínguez, S. Rothe, F. Käppeler, Francesca Matteucci, R. Catherall, I. F. Gonçalves, P. Kavrigin, L. Cosentino, D. Bosnar, Ralf Nolte, Javier Praena, S. Lo Meo, M. Brugger, E. Griesmayer, A. Stamatopoulos, L. A. Damone, C. Beinrucker, T. Stora, Claudia Lederer-Woods, E. Leal-Cidoncha, W.I. Furman, E. Chiaveri, A. Gawlik, Thomas Rauscher, P. F. Mastinu, D. Cano-Ott, A.P. Bernardes, Deniz Kurtulgil, P. V. Sedyshev, M. Diakaki, A. S. Brown, J. L. Tain, U. Kohester, J. Balibrea-Correa, E. González-Romero, Niko Kivel, O. Aberle, J. Billowes, N. Colonna, A. Oprea, J. Andrzejewski, A. Pavlik, Y. Kadi, C. Domingo-Pardo, Y. H. Chen, C. Rubbia, Kathrin Göbel, J. Marganiec, B. Marsh, P. M. Milazzo, S. Valenta, Karl Johnston, N. Patronis, G. Tagliente, F. Cerutti, R. Vlastou, Marco Calviani, A. G. Smith, D. Radeck, G. Corts, E. Berthoumieux, P. Vaz, A. Masi, Jan Heyse, D. G. Jenkins, T.D. Goodacre, C. Seiffert, M. Ayranov, Emilio Andrea Maugeri, M. Krtička, Simone Gilardoni, A. Musumarra, J. Ballof, E. Jericha, A. Dorsival, Paolo Finocchiaro, T. Martinez, Dorothea Schumann, M. Kokkoris, C. Weiß, S. Heinitz, J. A. Ryan, Tanja Heftrich, N. V. Sosnin, R. Cardella, A. Riego-Perez, Annamaria Mazzone, Petar Žugec, S. Altstadt, L. Audouin, S. Warren, G. Vannini, F. Bečvář, V. Variale, C. Wolf, E. Mendoza, M. Caamaño, Peter Schillebeeckx, P. C. Rout, A. Kalamara, F. Mingrone, T. J. Wright, E. Dupont, M. Mastromarco, A. J. M. Plompen, A. Garca-Rios, Massimo Barbagallo, M. Dietz, Anton Wallner, Hideo Harada, J.G. Martins Correia, M. Mirea, Rugard Dressler, F. Calviño, H. Leeb, M. Sabaté-Gilarte, A. Tsinganis, Luciano Piersanti, J. Perkowski, F. Gunsing, Vasilis Vlachoudis, Cristian Massimi, A. Ferrari, Pedro G. Ferreira, Mario Weigand, M. Bacak, T. Glodariu, Roberto Losito, 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), n_TOF, 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), Damone, L. A., Barbagallo, M., Mastromarco, M., Mengoni, A., Colonna, N., Cosentino, L., Maugeri, E. A., Heinitz, S., Schumann, D., Dressler, R., Kappeler, F., Finocchiaro, P., Andrzejewski, J., Perkowski, J., Gawlik, A., Aberle, O., Altstadt, S., Ayranov, M., Audouin, L., Bacak, M., Balibrea-Correa, J., Ballof, J., Bcares, V., Becvar, F., Beinrucker, C., Bellia, G., Bernardes, A. P., Berthoumieux, E., Billowes, J., Borge, M. J. G., Bosnar, D., Brown, A., Brugger, M., Busso, M., Caamano, M., Calvino, F., Calviani, M., Cano-Ott, D., Cardella, R., Casanovas, A., Castelluccio, D. M., Catherall, R., Cerutti, F., Chen, Y. H., Chiaveri, E., Corts, G., Cortes-Giraldo, M. A., Cristallo, S., Diakaki, M., Dietz, M., Domingo-Pardo, C., Dorsival, A., Dupont, E., Duran, I., Fernandez-Dominguez, B., Ferrari, A., Ferreira, P., Furman, W., Ganesan, S., Garca-Rios, A., Gilardoni, S., Glodariu, T., Gobel, K., Goncalves, I. F., Gonzalez-Romero, E., Goodacre, T. D., Griesmayer, E., Guerrero, C., Gunsing, F., Harada, H., Heftrich, T., Heyse, J., Jenkins, D. G., Jericha, E., Johnston, K., Kadi, Y., Kalamara, A., Katabuchi, T., Kavrigin, P., Kimura, A., Kivel, N., Kohester, U., Kokkoris, M., Krticka, M., Kurtulgil, D., Leal-Cidoncha, E., Lederer-Woods, C., Leeb, H., Lerendegui-Marco, J., Lo Meo, S., Lonsdale, S. J., Losito, R., Macina, D., Marganiec, J., Marsh, B., Martinez, T., Martins Correia, J. G., Masi, A., Massimi, C., Mastinu, P., Matteucci, F., Mazzone, A., Mendoza, E., Milazzo, P. M., Mingrone, F., Mirea, M., Musumarra, A., Negret, A., Nolte, R., Oprea, A., Patronis, N., Pavlik, A., Piersanti, L., Piscopo, M., Plompen, A., Porras, I., Praena, J., Quesada, J. M., Radeck, D., Rajeev, K., Rauscher, T., Reifarth, R., Riego-Perez, A., Rothe, S., Rout, P., Rubbia, C., Ryan, J., Sabate-Gilarte, M., Saxena, A., Schell, J., Schillebeeckx, P., Schmidt, S., Sedyshev, P., Seiffert, C., Smith, A. G., Sosnin, N. V., Stamatopoulos, A., Stora, T., Tagliente, G., Tain, J. L., Tarifeno-Saldivia, A., Tassan-Got, L., Tsinganis, A., Valenta, S., Vannini, G., Variale, V., Vaz, P., Ventura, A., Vlachoudis, V., Vlastou, R., Wallner, A., Warren, S., Weigand, M., Weiss, C., Wolf, C., Woods, P. J., Wright, T., Zugec, P., Formicola, Alba, Junker, Matthias, Gialanella, Lucio, Imbriani, Gianluca, Damone L.A., Barbagallo M., Mastromarco M., Mengoni A., Colonna N., Cosentino L., Maugeri E.A., Heinitz S., Schumann D., Dressler R., Kappeler F., Finocchiaro P., Andrzejewski J., Perkowski J., Gawlik A., Aberle O., Altstadt S., Ayranov M., Audouin L., Bacak M., Balibrea-Correa J., Ballof J., Bcares V., Becvar F., Beinrucker C., Bellia G., Bernardes A.P., Berthoumieux E., Billowes J., Borge M.J.G., Bosnar D., Brown A., Brugger M., Busso M., Caamano M., Calvino F., Calviani M., Cano-Ott D., Cardella R., Casanovas A., Castelluccio D.M., Catherall R., Cerutti F., Chen Y.H., Chiaveri E., Corts G., Cortes-Giraldo M.A., Cristallo S., Diakaki M., Dietz M., Domingo-Pardo C., Dorsival A., Dupont E., Duran I., Fernandez-Dominguez B., Ferrari A., Ferreira P., Furman W., Ganesan S., Garca-Rios A., Gilardoni S., Glodariu T., Gobel K., Goncalves I.F., Gonzalez-Romero E., Goodacre T.D., Griesmayer E., Guerrero C., Gunsing F., Harada H., Heftrich T., Heyse J., Jenkins D.G., Jericha E., Johnston K., Kadi Y., Kalamara A., Katabuchi T., Kavrigin P., Kimura A., Kivel N., Kohester U., Kokkoris M., Krticka M., Kurtulgil D., Leal-Cidoncha E., Lederer-Woods C., Leeb H., Lerendegui-Marco J., Lo Meo S., Lonsdale S.J., Losito R., Macina D., Marganiec J., Marsh B., Martinez T., Martins Correia J.G., Masi A., Massimi C., Mastinu P., Matteucci F., Mazzone A., Mendoza E., Milazzo P.M., Mingrone F., Mirea M., Musumarra A., Negret A., Nolte R., Oprea A., Patronis N., Pavlik A., Piersanti L., Piscopo M., Plompen A., Porras I., Praena J., Quesada J.M., Radeck D., Rajeev K., Rauscher T., Reifarth R., Riego-Perez A., Rothe S., Rout P., Rubbia C., Ryan J., Sabate-Gilarte M., Saxena A., Schell J., Schillebeeckx P., Schmidt S., Sedyshev P., Seiffert C., Smith A.G., Sosnin N.V., Stamatopoulos A., Stora T., Tagliente G., Tain J.L., Tarifeno-Saldivia A., Tassan-Got L., Tsinganis A., Valenta S., Vannini G., Variale V., Vaz P., Ventura A., Vlachoudis V., Vlastou R., Wallner A., Warren S., Weigand M., Weiss C., Wolf C., Woods P.J., Wright T., and Zugec P.

Subjects
Physics, Large Hadron Collider, 010308 nuclear & particles physics, chemistry.chemical_element, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, BBN, neutron, Nuclear physics, Stars, Cross section (physics), chemistry, Big Bang nucleosynthesis, 7Be(n, p)7Li, Cosmological Lithium Problem, n_TOF, 0103 physical sciences, Nuclear astrophysics, Lithium, Halo, 010306 general physics, Beam (structure)
Abstract

International audience; One of the most puzzling problems in Nuclear Astrophysics is the “Cosmological Lithium Problem”, i.e the discrepancy between the primordial abundance of$^{7}$ Li observed in metal poor halo stars (Asplund et al. in Astrophys J 644:229–259, 2006, [1]), and the one predicted by Big Bang Nucleosynthesis (BBN). One of the reactions that could have an impact on the problem is$^{7}$ Be(n,p)$^{7}$ Li. Despite of the importance of this reaction in BBN, the cross-section has never been directly measured at the energies of interest for BBN. Taking advantage of the innovative features of the second experimental area at the n $\_$ TOF facility at CERN (Sabate-Gilarte et al. in Eur Phys J A 53:210, 2017, [2], Weiss et al. in NIMA 799:90, 2015, [3]), an accurate measurement of$^{7}$ Be(n,p) cross section has been recently performed at n $\_$ TOF, with a pure$^{7}$ Be target produced by implantation of a$^{7}$ Be beam at ISOLDE. The mesurement started in April 2016 and lasted for two months. The experimental procedure, the setup used in the measurement and the results obtained so far will be here presented.

Published
2018

39. Measurement of 73Ge(n,g) cross sections and implications for stellar nucleosynthesis

Author

S. Montesano, V. Khryachkov, A. Tsinganis, Alfredo Ferrari, F. R. Palomo-Pinto, Nicola Colonna, E. Dupont, A. Goverdovski, G. Tagliente, J. Heyse, A. Musumarra, Claudia Lederer-Woods, M. Mastromarco, F. Gunsing, Cristian Massimi, Pedro G. Ferreira, Mario Weigand, I. Duran, E. Mendoza, Anton Wallner, M. Bacak, P. V. Sedyshev, M. Mirea, J. Balibrea, V. Furman, F. Calviño, H. Leeb, Ioana Gheorghe, J. Perkowski, Tanja Heftrich, S. Heinitz, J. Billowes, M. Sabaté-Gilarte, A. Kimura, Francesca Matteucci, A. Riego-Perez, T. Glodariu, M. Krtička, A. Hernández-Prieto, S. Warren, V. Bécares, L. Cosentino, N. Patronis, R. Dressler, Roberto Losito, M. S. Robles, T. Martinez, E. Jericha, C. Weiss, D. Macina, R. Vlastou, V. Variale, Paolo Finocchiaro, A. Stamatopoulos, P. M. Milazzo, O. Aberle, J. A. Ryan, D. G. Jenkins, E. Berthoumieux, Mario Barbagallo, M. Diakaki, Alberto Mengoni, J. Marganiec, Carlos Guerrero, F. Bečvář, A. Saxena, S. V. Suryanarayana, D. Schumann, Damir Bosnar, Y. Kadi, E. González-Romero, P. F. Mastinu, A. Tattersall, P. Schillebeeckx, Hideo Harada, M. A. Cortés-Giraldo, P. Kavrigin, F. Mingrone, S. Valenta, J. Andrzejewski, Ralf Nolte, Marco Calviani, V. Vlachoudis, M. Kokkoris, Rene Reifarth, E. Griesmayer, A. G. Smith, Petar Žugec, C. Paradela, M. Dietz, Stefan Schmidt, L. A. Damone, L. Audouin, J. M. Quesada, L. Tassan-Got, K. Göbel, B. Fernández-Domínguez, F. Käppeler, T. Wright, Tatsuya Katabuchi, S. Barros, U. Battino, A. Pavlik, C. Domingo-Pardo, E. Chiaveri, D. Cano-Ott, J. I. Porras, I. Knapova, P. Vaz, Alberto Ventura, C. Rubbia, J. L. Tain, Niko Kivel, G. Cortes, J. Lerendegui-Marco, A. R. García, M. Brugger, I. F. Gonçalves, R. J. W. Frost, C. Beinrucker, E. Leal-Cidoncha, Javier Praena, S. Lo Meo, Fabio Belloni, G. Vannini, A. Gawlik, Thomas Rauscher, Ariel Tarifeño-Saldivia, M. Licata, K. Deo, M. Caamaño, V. Ketlerov, F. Cerutti, Lederer-Woods, C., Battino, U., Ferreira, P., Gawlik, A., Guerrero, C., Gunsing, F., Heinitz, S., Lerendegui-Marco, J., Mengoni, A., Reifarth, R., Tattersall, A., Valenta, S., Weiss, C., Aberle, O., Andrzejewski, J., Audouin, L., Becares, V., Bacak, M., Balibrea, J., Barbagallo, M., Barros, S., Becvar, F., Beinrucker, C., Belloni, F., Berthoumieux, E., Billowes, J., Bosnar, D., Brugger, M., Caamano, M., Calvino, F., Calviani, M., Cano-Ott, D., Cerutti, F., Chiaveri, E., Colonna, N., Cortes, G., Cortes-Giraldo, M. A., Cosentino, L., Damone, L. A., Deo, K., Diakaki, M., Dietz, M., Domingo-Pardo, C., Dressler, R., Dupont, E., Duran, I., Fernandez-Dominguez, B., Ferrari, A., Finocchiaro, P., Frost, R. J. W., Furman, V., Gobel, K., Garcia, A. R., Gheorghe, I., Glodariu, T., Goncalves, I. F., Gonzalez-Romero, E., Goverdovski, A., Griesmayer, E., Harada, H., Heftrich, T., Hernandez-Prieto, A., Heyse, J., Jenkins, D. G., Jericha, E., Kappeler, F., Kadi, Y., Katabuchi, T., Kavrigin, P., Ketlerov, V., Khryachkov, V., Kimura, A., Kivel, N., Knapova, I., Kokkoris, M., Krticka, M., Leal-Cidoncha, E., Leeb, H., Licata, M., Lo Meo, S., Losito, R., Macina, D., Marganiec, J., Martinez, T., Massimi, C., Mastinu, P., Mastromarco, M., Matteucci, F., Mendoza, E., Milazzo, P. M., Mingrone, F., Mirea, M., Montesano, S., Musumarra, A., Nolte, R., Palomo-Pinto, F. R., Paradela, C., Patronis, N., Pavlik, A., Perkowski, J., Porras, J. I., Praena, J., Quesada, J. M., Rauscher, T., Riego-Perez, A., Robles, M., Rubbia, C., Ryan, J. A., Sabate-Gilarte, M., Saxena, A., Schillebeeckx, P., Schmidt, S., Schumann, D., Sedyshev, P., Smith, A. G., Stamatopoulos, A., Suryanarayana, S. V., Tagliente, G., Tain, J. L., Tarifeno-Saldivia, A., Tassan-Got, L., Tsinganis, A., Vannini, G., Variale, V., Vaz, P., Ventura, A., Vlachoudis, V., Vlastou, R., Wallner, A., Warren, S., Weigand, M., Wright, T., Zugec, P., 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), n_TOF, Ministerio de Economía y Competitividad (España), Bécares, V., Bečvář, F., Caamaño, M., Calviño, F., Cortés, G., Cortés-Giraldo, M.A., Damone, L.A., Durán, I., Fernández-Domínguez, B., Frost, R.J.W., Göbel, K., García, A.R., Gonçalves, I.F., González-Romero, E., Hernández-Prieto, A., Jenkins, D.G., Käppeler, F., Krtička, M., Martínez, T., Milazzo, P.M., Palomo-Pinto, F.R., Porras, J.I., Quesada, J.M., Ryan, J.A., Sabaté-Gilarte, M., Smith, A.G., Suryanarayana, S.V., Tain, J.L., Tarifeño-Saldivia, A., Žugec, P., Universitat Politècnica de Catalunya. Departament de Física, Universitat Politècnica de Catalunya. ANT - Advanced Nuclear Technologies Research Group, 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, Neutron capture, s process, Germanium, n_TOF, s proce, Nuclear reaction, Natural abundance, nucl-ex, 01 natural sciences, 7. Clean energy, Stellar nucleosynthesis, CERN, Astrophysics::Solar and Stellar Astrophysics, n_TOF, Nuclear Experiment (nucl-ex), Nuclear Experiment, Physics, Cross section, Germanium, lcsh:QC1-999, PRIRODNE ZNANOSTI. Fizika, Neutron capture, Nucleosynthesis, s process, Nucleosíntesi, Nuclear and High Energy Physics, nTOF, Astrophysics::High Energy Astrophysical Phenomena, FOS: Physical sciences, Neutron, Neutrons--Captura, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Neutrons--Capture, Nuclear physics, 0103 physical sciences, Nuclear Physics - Experiment, 010306 general physics, Nucleosynthesi, Energies::Energia nuclear [Àrees temàtiques de la UPC], Física [Àrees temàtiques de la UPC], 010308 nuclear & particles physics, Capture cross section, NATURAL SCIENCES. Physics, Stars, 13. Climate action, s-process, lcsh:Physics
Abstract

73Ge(n, γ) cross sections were measured at the neutron time-of-flight facility n_TOF at CERN up to neutron energies of 300keV, providing for the first time experimental data above 8keV. Results indicate that the stellar cross section at kT=30keV is 1.5 to 1.7 times higher than most theoretical predictions. The new cross sections result in a substantial decrease of 73Ge produced in stars, which would explain the low isotopic abundance of 73Ge in the solar system., This work was supported by the Austrian Science Fund FWF (J3503), the Adolf Messer Foundation (Germany), the UK Science and Facilities Council (ST/M006085/1), and the European Research Council ERC-2015-StG Nr.677497.

Published
2019
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40. Measurement of the α ratio and (n, γ) cross section of 235U from 0.2 to 200 eV at n_TOF

Author

Balibrea-Correa, J., Mendoza, E., Cano-Ott, D., González, E., Capote, R., Krtička, M., Altstadt, S., Andrzejewski, J., Audouin, L., Bécares, V., Barbagallo, M., Bečvář, F., Belloni, F., Berthoumieux, E., Billowes, J., Boccone, V., Bosnar, D., Brugger, M., Calviani, M., Calviño, F., Carrapiço, C., Cerutti, F., Chiaveri, E., Chin, M., Colonna, N., Cortés, G., Cortés-Giraldo, M. A., Diakaki, M., Domingo-Pardo, C., Dressler, R., Durán, I., Eleftheriadis, C., Ferrari, A., Fraval, K., Furman, V., Göbel, K., Gómez-Hornillos, M. B., Ganesan, S., García, A. R., Giubrone, G., Gonçalves, I. F., Goverdovski, A., Griesmayer, E., Guerrero, C., Gunsing, F., Heftrich, T., Hernández-Prieto, A., Heyse, J., Jenkins, D. G., Jericha, E., Käppeler, F., Kadi, Y., Karadimos, D., Katabuchi, T., Ketlerov, V., Khryachkov, V., Kivel, N., Koehler, P., Kokkoris, M., Kroll, J., Lampoudis, C., Langer, C., Leal-Cidoncha, E., Lederer, C., Leeb, H., Leong, L. S., Lerendegui-Marco, J., Losito, R., Mallick, A., Manousos, A., Marganiec, J., Martínez, T., Massimi, C., Mastinu, P., Mastromarco, M., Mengoni, A., Milazzo, P. M., Mingrone, F., Mirea, M., Mondelaers, W., Paradela, C., Pavlik, A., Perkowski, J., Plompen, A. J. M., Praena, J., Quesada, J. M., Rauscher, T., Reifarth, R., Riego-Perez, A., Robles, M., Rubbia, C., Ryan, J. A., Sabaté-Gilarte, M., Sarmento, R., Saxena, A., Schillebeeckx, P., Schmidt, S., Schumann, D., Sedyshev, P., Tagliente, G., Tain, J. L., Tarifeño-Saldivia, A., 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
PRIRODNE ZNANOSTI. Fizika, α ratio, 235U, Physics, ddc:530, n_TOF, neutron time of flight, NATURAL SCIENCES. Physics
Abstract

We measured the neutron capture-to-fission cross-section ratio (α ratio) and the capture cross section of $^{235}$U between 0.2 and 200 eV at the n_TOF facility at CERN. The simultaneous measurement of neutron-induced capture and fission rates was performed by means of the n_TOF BaF$_{2}$ Total Absorption Calorimeter (TAC), used for detection of γ rays, in combination with a set of micromegas detectors used as fission tagging detectors. The energy dependence of the capture cross section was obtained with help of the $^{6}$Li(n,t) standard reaction determining the n_TOF neutron fluence; the well-known integral of the $^{235}$U(n,f) cross section between 7.8 and 11 eV was then used for its absolute normalization. The α ratio, obtained with slightly higher statistical fluctuations, was determined directly, without need for any reference cross section. To perform the analysis of this measurement we developed a new methodology to correct the experimentally observed effect that the probabilities of detecting a fission reaction in the TAC and the micromegas detectors are not independent. The results of this work have been used in a new evaluation of $^{235}$U performed within the scope of the Collaborative International Evaluated Library Organisation (CIELO) Project, and are consistent with the ENDF/B-VIII.0 and JEFF-3.3 capture cross sections below 4 eV and above 100 eV. However, the measured capture cross section is on average 10% larger between 4 and 100 eV.

Published
2020

41. Measurement of the α ratio and (n,γ) cross section of U235 from 0.2 to 200 eV at n_TOF

Author

M. B. Gomez-Hornillos, J. Andrzejewski, C. Carrapiço, M. A. Cortés-Giraldo, G. Cortes, Tanja Heftrich, A. Riego-Perez, D. Tarrío, V. Bécares, C. Weiss, Roberto Capote, M. Mirea, Srinivasan Ganesan, Kathrin Göbel, A. Mallick, G. Vannini, E. Jericha, Rene Reifarth, F. Mingrone, Rugard Dressler, Jan Heyse, M. Mastromarco, Dorothea Schumann, G. Tagliente, C. Lederer, S. Altstadt, V. Variale, J. A. Ryan, E. Chiaveri, A. Tsinganis, P. F. Mastinu, A. K. Saxena, P. Vaz, Stefan Schmidt, Jeri Kroll, F. Calviño, Massimo Barbagallo, Petar Žugec, L.S. Leong, F. Bečvář, H. Leeb, Anton Wallner, Arnaud Ferrari, Vasilis Vlachoudis, J. Balibrea-Correa, M. S. Robles, E. Mendoza, N. Colonna, Peter Schillebeeckx, J. Billowes, J. Perkowski, R. Sarmento, C. Lampoudis, A. Pavlik, V. Khryachkov, P. M. Milazzo, C. Domingo-Pardo, Vittorio Boccone, J. M. Quesada, L. Tassan-Got, P. E. Koehler, Willy Mondelaers, P. V. Sedyshev, D. G. Jenkins, M. Sabaté-Gilarte, D. Cano-Ott, M. Diakaki, C. Paradela, Roberto Losito, L. Audouin, Christoph Langer, K. Fraval, M. Kokkoris, M. Krtička, A. Manousos, A. Goverdovski, Mario Weigand, T. Martinez, D. Bosnar, J. Marganiec, A. Hernández-Prieto, T. Ware, R. Vlastou, E. Berthoumieux, E. Griesmayer, Carlos Guerrero, G. Giubrone, F. Gunsing, Cristian Massimi, V. Furman, T. J. Wright, Tatsuya Katabuchi, A. Ventura, A. Mengoni, M. P. W. Chin, I. Duran, V. Ketlerov, E. Leal-Cidoncha, C. Eleftheriadis, Thomas Rauscher, J. L. Tain, D. Karadimos, Ariel Tarifeño-Saldivia, J. Lerendegui-Marco, Niko Kivel, A. R. García, M. Brugger, C. Rubbia, I. F. Gonçalves, Fabio Belloni, Javier Praena, F. Cerutti, M. J. Vermeulen, Y. Kadi, S. Valenta, Marco Calviani, E. González, F. Käppeler, and A. J. M. Plompen

Subjects
Nuclear reaction, Physics, 010308 nuclear & particles physics, Fission, 01 natural sciences, Calorimeter, Nuclear physics, Cross section (physics), Neutron capture, Neutron flux, Nuclear fission, 0103 physical sciences, Neutron, 010306 general physics
Abstract

We measured the neutron capture-to-fission cross-section ratio (α ratio) and the capture cross section of $^{235}$U between 0.2 and 200 eV at the n_TOF facility at CERN. The simultaneous measurement of neutron-induced capture and fission rates was performed by means of the n_TOF BaF$_{2}$ Total Absorption Calorimeter (TAC), used for detection of γ rays, in combination with a set of micromegas detectors used as fission tagging detectors. The energy dependence of the capture cross section was obtained with help of the $^{6}$Li(n,t) standard reaction determining the n_TOF neutron fluence; the well-known integral of the $^{235}$U(n,f) cross section between 7.8 and 11 eV was then used for its absolute normalization. The α ratio, obtained with slightly higher statistical fluctuations, was determined directly, without need for any reference cross section. To perform the analysis of this measurement we developed a new methodology to correct the experimentally observed effect that the probabilities of detecting a fission reaction in the TAC and the micromegas detectors are not independent. The results of this work have been used in a new evaluation of $^{235}$U performed within the scope of the Collaborative International Evaluated Library Organisation (CIELO) Project, and are consistent with the ENDF/B-VIII.0 and JEFF-3.3 capture cross sections below 4 eV and above 100 eV. However, the measured capture cross section is on average 10% larger between 4 and 100 eV.

Published
2020

42. Investigation of the Pu240(n,f) reaction at the n_TOF/EAR2 facility in the 9 meV–6 MeV range

Author

R. J. W. Frost, A. Goverdovski, A. Mengoni, M. Krtička, V. Furman, T. J. Wright, I. Duran, G. Tagliente, Petar Žugec, Javier Praena, S. Lo Meo, T. Martinez, L. Cosentino, K. Deo, G. Vannini, V. Ketlerov, D. Bosnar, E. Dupont, A. Musumarra, Tatsuya Katabuchi, A. Ventura, M. Mirea, M. Mastromarco, S. Warren, A. Kimura, S. Heinitz, V. Variale, S. Barros, A. Tsinganis, Massimo Barbagallo, F. R. Palomo-Pinto, M. Caamaño, Rene Reifarth, E. Chiaveri, D. G. Jenkins, Anton Wallner, Stefan Schmidt, C. Paradela, Rugard Dressler, F. Calviño, Tanja Heftrich, P. F. Mastinu, L. Audouin, M. Licata, H. Leeb, J. M. Quesada, L. Tassan-Got, J. Balibrea, S. V. Suryanarayana, F. Mingrone, C. Lederer, I. Knapova, A. Riego-Perez, J. Perkowski, R. Vlastou, J. Marganiec, S. Valenta, Ariel Tarifeño-Saldivia, A. J. M. Plompen, F. Gunsing, P. Vaz, N. Colonna, Marco Calviani, E. Berthoumieux, P. Kavrigin, Ralf Nolte, A. G. Smith, M. A. Cortés-Giraldo, F. Cerutti, Cristian Massimi, A. Pavlik, E. Leal-Cidoncha, O. Aberle, E. Griesmayer, L. A. Damone, C. Domingo-Pardo, Hideo Harada, A. Hernández-Prieto, M. Sabaté-Gilarte, Kathrin Göbel, Vasilis Vlachoudis, V. Bécares, M. S. Robles, Thomas Rauscher, Jan Heyse, M. Kokkoris, C. Rubbia, Pedro G. Ferreira, Mario Weigand, C. Weiss, D. Cano-Ott, Y. Kadi, M. Diakaki, F. Bečvář, M. Bacak, E. Mendoza, Peter Schillebeeckx, J. Lerendegui-Marco, D. Macina, Carlos Guerrero, J. L. Tain, J. I. Porras, T. Glodariu, Roberto Losito, I. F. Gonçalves, Niko Kivel, B. Fernández-Domínguez, E. González-Romero, F. Käppeler, Fabio Belloni, A. R. García, Francesca Matteucci, M. Brugger, C. Beinrucker, V. Khryachkov, P. M. Milazzo, Ioana Gheorghe, N. Patronis, A. K. Saxena, Arnaud Ferrari, S. Montesano, J. Billowes, E. Jericha, A. Stamatopoulos, Paolo Finocchiaro, Dorothea Schumann, J. A. Ryan, P. V. Sedyshev, J. Andrzejewski, and G. Cortes

Subjects
Physics, Nuclear transmutation, 010308 nuclear & particles physics, Fission, Monte Carlo method, Radioactive waste, MicroMegas detector, 7. Clean energy, 01 natural sciences, Neutron temperature, Spent nuclear fuel, Nuclear physics, 0103 physical sciences, Neutron, Nuclear Experiment, 010306 general physics
Abstract

Background: Nuclear waste management is considered amongst the major challenges in the field of nuclear energy. A possible means of addressing this issue is waste transmutation in advanced nuclear systems, whose operation requires a fast neutron spectrum. In this regard, the accurate knowledge of neutron-induced reaction cross sections of several (minor) actinide isotopes is essential for design optimization and improvement of safety margins of such systems. One such case is Pu240, due to its accumulation in spent nuclear fuel of thermal reactors and its usage in fast reactor fuel. The measurement of the Pu240(n,f) cross section was previously attempted at the CERN n_TOF facility EAR1 measuring station using the time-of-flight technique. Due to the low amount of available material and the given flux at EAR1, the measurement had to last several months to achieve a sufficient statistical accuracy. This long duration led to detector deterioration due to the prolonged exposure to the high α activity of the fission foils, therefore the measurement could not be successfully completed. Purpose: It is aimed to determine whether it is feasible to study neutron-induced fission at n_TOF/EAR2 and provide data on the Pu240(n,f) reaction in energy regions requested for applications. Methods: The study of the Pu240(n,f) reaction was made at a new experimental area (EAR2) with a shorter flight path which delivered on average 30 times higher flux at fast neutron energies. This enabled the measurement to be performed much faster, thus limiting the exposure of the detectors to the intrinsic activity of the fission foils. The experimental setup was based on microbulk Micromegas detectors and the time-of-flight data were analyzed with an optimized pulse-shape analysis algorithm. Special attention was dedicated to the estimation of the non-negligible counting loss corrections with the development of a new methodology, and other corrections were estimated via Monte Carlo simulations of the experimental setup. Results: This new measurement of the Pu240(n,f) cross section yielded data from 9meV up to 6MeV incident neutron energy and fission resonance kernels were extracted up to 10keV. Conclusions: Neutron-induced fission of high activity samples can be successfully studied at the n_TOF/EAR2 facility at CERN covering a wide range of neutron energies, from thermal to a few MeV.

Published
2020

43. Measurement of the Pu-242(n,gamma) cross section from thermal to 500 keV at the Budapest research reactor and CERN n_TOF-EAR1 facilities

Author

O. Aberle, G. Cortes, C. Rubbia, Rugard Dressler, V. Khryachkov, P. M. Milazzo, Pedro G. Ferreira, Mario Weigand, A. Oprea, Tamás Belgya, A. Goverdovski, L. Cosentino, E. Jericha, A. Tsinganis, Paolo Finocchiaro, Dorothea Schumann, J. A. Ryan, L. Audouin, F. Mingrone, K. Rajeev, J. Lerendegui-Marco, J. L. Tain, A. Kimura, D. M. Castelluccio, J. Andrzejewski, Francesca Matteucci, I. Knapova, A. Musumarra, F. Cerutti, Nicola Colonna, M. A. Cortés-Giraldo, T. Martinez, Niko Kivel, I. F. Gonçalves, I. Duran, Mario Barbagallo, F. Gunsing, V. Vlachoudis, G. Vannini, A. R. García, Cristian Massimi, P. Vaz, P. J. Woods, P. C. Rout, M. Caamaño, Tanja Heftrich, C. Weiss, G. Tagliente, C. Lederer, Alberto Ventura, J. Marganiec, A. Riego-Perez, Ariel Tarifeño-Saldivia, S. J. Lonsdale, M. Mirea, V. Bécares, M. Brugger, D. Macina, S. Heinitz, Carlos Guerrero, R. Vlastou, D. Cano-Ott, M. Diakaki, Y. Kadi, A. Pavlik, F. Calviño, H. Leeb, B. Fernández-Domínguez, A. Casanovas, F. Käppeler, E. Chiaveri, Javier Praena, S. Lo Meo, N. Patronis, A. K. Saxena, C. Domingo-Pardo, E. Berthoumieux, Diego Vescovi, J. Perkowski, S. Valenta, Arnaud Ferrari, D. G. Jenkins, P. F. Mastinu, F. Bečvář, M. Bacak, Marco Calviani, C. Beinrucker, C. Wolf, P. Kavrigin, Kathrin Göbel, E. Mendoza, Alberto Mengoni, A. G. Smith, Ralf Nolte, J. Billowes, Jan Heyse, E. Leal-Cidoncha, Peter Schillebeeckx, E. Griesmayer, Tatsuya Katabuchi, D. Bosnar, L. A. Damone, M. Krtiička, R. Cardella, Emilio Andrea Maugeri, S. Barros, M. Kokkoris, A. Gawlik, J. I. Porras, Rene Reifarth, T. Glodariu, Thomas Rauscher, S. Warren, Roberto Losito, Stefan Schmidt, J. M. Quesada, L. Tassan-Got, Y. H. Chen, V. Variale, P. V. Sedyshev, Arnd R. Junghans, Petar Žugec, E. González-Romero, V. Ketlerov, V. Furman, Klaus Eberhardt, T. J. Wright, S. Montesano, A. Stamatopoulos, M. Mastromarco, Anton Wallner, J. Balibrea, M. Sabaté-Gilarte, Hideo Harada, E. Dupont, Boglárka Maróti, 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, Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear, Ge, Z., Shu, N., Chen, Y., Wang, W., Zhang, H., 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
Physics, Large Hadron Collider, Isotope, 010308 nuclear & particles physics, Fission, QC1-999, n_TOF, 242Pu, neutron capture, neutron time of flight, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, 7. Clean energy, Resonance (particle physics), Nuclear physics, Stack (abstract data type), 0103 physical sciences, Neutron, Research reactor, Nuclear Physics - Experiment, Neutron activation analysis, 010306 general physics
Abstract

The design and operation of innovative nuclear systems requires a better knowledge of the capture and fission cross sections of the Pu isotopes. For the case of capture on 242Pu, a reduction of the uncertainty in the fast region down to 8-12% is required. Moreover, aiming at improving the evaluation of the fast energy range in terms of average parameters, the OECD NEA High Priority Request List (HPRL) requests high-resolution capture measurements with improved accuracy below 2 keV. The current uncertainties also affect the thermal point, where previous experiments deviate from each other by 20%. A fruitful collaboration betwen JGU Mainz and HZ Dresden-Rossendorf within the EC CHANDA project resulted in a 242Pu sample consisting of a stack of seven fission-like targets making a total of 95(4) mg of 242Pu electrodeposited on thin (11.5 μm) aluminum backings. This contribution presents the results of a set of measurements of the 242Pu(n, γ) cross section from thermal to 500 keV combining different neutron beams and techniques. The thermal point was determined at the Budapest Research Reactor by means of Neutron Activation Analysis and Prompt Gamma Analysis, and the resolved (1 eV - 4 keV) and unresolved (1 - 500 keV) resonance regions were measured using a set of four Total Energy detectors at the CERN n_TOF-EAR1. European Commission 334315, 605203 Ministerio de Economía y Competitividad FPA2013-45083-P, FPA2014-53290-C2-2-P, FPA2016-77689-C2-1-R German Federal Ministry for Education and Research (BMBF) 03NUK13A

Published
2020

44. Investigation of the $^{240}$Pu$(n,f)$ reaction at the n_TOF/EAR2 facility in the 9 meV–6 MeV range

Author

Stamatopoulos, A., Tsinganis, A., Colonna, N., Kokkoris, M., Vlastou, R., Diakaki, M., Žugec, P., Schillebeeckx, P., Gunsing, F., Sabaté-Gilarte, M., Barbagallo, M., Aberle, O., Andrzejewski, J., Audouin, L., Bécares, V., Bacak, M., Balibrea, J., Barros, S., Bečvář, F., Beinrucker, C., Belloni, F., Berthoumieux, E., Billowes, J., Bosnar, D., Brugger, M., Caamaño, M., Lo Meo, S., Calviño, F., Calviani, M., Cano-Ott, D., Cerutti, F., Chiaveri, E., Cortés, G., Cortés-Giraldo, M.A., Cosentino, L., Damone, L.A., Deo, K., Domingo-Pardo, C., Dressler, R., Dupont, E., Durán, I., Fernández-Domínguez, B., Ferrari, A., Ferreira, P., Finocchiaro, P., Frost, R.J.W., Furman, V., Göbel, K., García, A.R., Gheorghe, I., Glodariu, T., Gonçalves, I.F., González-Romero, E., Goverdovski, A., Griesmayer, E., Guerrero, C., Harada, H., Heftrich, T., Heinitz, S., Hernández-Prieto, A., Heyse, J., Jenkins, D.G., Jericha, E., Käppeler, F., Kadi, Y., Katabuchi, T., Kavrigin, P., Ketlerov, V., Khryachkov, V., Kimura, A., Kivel, N., Knapova, I., Krtička, M., Leal-Cidoncha, E., Lederer, C., Leeb, H., Lerendegui-Marco, J., Licata, M., Losito, R., Macina, D., Marganiec, J., Martínez, T., Massimi, C., Mastinu, P., Mastromarco, M., Matteucci, F., Mendoza, E., Mengoni, A., Milazzo, P.M., Mingrone, F., Mirea, M., Montesano, S., Musumarra, A., Nolte, R., Palomo-Pinto, F.R., Paradela, C., Patronis, N., Pavlik, A., Perkowski, J., Plompen, A., Porras, J.I., Praena, J., Quesada, J.M., Rauscher, T., Reifarth, R., Riego-Perez, A., Robles, M., Rubbia, C., Ryan, J.A., Saxena, A., Schmidt, S., Schumann, D., Sedyshev, P., Smith, A.G., Suryanarayana, S.V., Tagliente, G., Tain, J.L., Tarifeño-Saldivia, A., Tassan-Got, L., Valenta, S., Vannini, G., Variale, V., Vaz, P., Ventura, A., Vlachoudis, V., Wallner, A., Warren, S., 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), 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, 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
PRIRODNE ZNANOSTI. Fizika, Nuclear Theory, Nuclear Reactions, Nuclear Physics - Experiment, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment, NATURAL SCIENCES. Physics
Abstract

International audience; Background: Nuclear waste management is considered amongst the major challenges in the field of nuclear energy. A possible means of addressing this issue is waste transmutation in advanced nuclear systems, whose operation requires a fast neutron spectrum. In this regard, the accurate knowledge of neutron-induced reaction cross sections of several (minor) actinide isotopes is essential for design optimization and improvement of safety margins of such systems. One such case is Pu240, due to its accumulation in spent nuclear fuel of thermal reactors and its usage in fast reactor fuel. The measurement of the Pu240(n,f) cross section was previously attempted at the CERN n_TOF facility EAR1 measuring station using the time-of-flight technique. Due to the low amount of available material and the given flux at EAR1, the measurement had to last several months to achieve a sufficient statistical accuracy. This long duration led to detector deterioration due to the prolonged exposure to the high α activity of the fission foils, therefore the measurement could not be successfully completed. Purpose: It is aimed to determine whether it is feasible to study neutron-induced fission at n_TOF/EAR2 and provide data on the Pu240(n,f) reaction in energy regions requested for applications. Methods: The study of the Pu240(n,f) reaction was made at a new experimental area (EAR2) with a shorter flight path which delivered on average 30 times higher flux at fast neutron energies. This enabled the measurement to be performed much faster, thus limiting the exposure of the detectors to the intrinsic activity of the fission foils. The experimental setup was based on microbulk Micromegas detectors and the time-of-flight data were analyzed with an optimized pulse-shape analysis algorithm. Special attention was dedicated to the estimation of the non-negligible counting loss corrections with the development of a new methodology, and other corrections were estimated via Monte Carlo simulations of the experimental setup. Results: This new measurement of the Pu240(n,f) cross section yielded data from 9meV up to 6MeV incident neutron energy and fission resonance kernels were extracted up to 10keV. Conclusions: Neutron-induced fission of high activity samples can be successfully studied at the n_TOF/EAR2 facility at CERN covering a wide range of neutron energies, from thermal to a few MeV.

Published
2020

45. Measurement of the $\alpha$ ratio and $(n,\gamma)$ cross section of $^{235}\mathrm{U}$ from 0.2 to 200 eV at n_TOF

Author

Balibrea-Correa, J., Mendoza, E., Cano-Ott, D., González, E., Capote, R., Krtička, M., Altstadt, S., Andrzejewski, J., Audouin, L., Bécares, V., Barbagallo, M., Bečvář, F., Belloni, F., Berthoumieux, E., Billowes, J., Boccone, V., Bosnar, D., Brugger, M., Calviani, M., Calviño, F., Carrapiço, C., Cerutti, F., Chiaveri, E., Chin, M., Colonna, N., Cortés, G., Cortés-Giraldo, M.A., Diakaki, M., Domingo-Pardo, C., Dressler, R., Durán, I., Eleftheriadis, C., Ferrari, A., Fraval, K., Furman, V., Göbel, K., Gómez-Hornillos, M.B., Ganesan, S., García, A.R., Giubrone, G., Gonçalves, I.F., Goverdovski, A., Griesmayer, E., Guerrero, C., Gunsing, F., Heftrich, T., Hernández-Prieto, A., Heyse, J., Jenkins, D.G., Jericha, E., Käppeler, F., Kadi, Y., Karadimos, D., Katabuchi, T., Ketlerov, V., Khryachkov, V., Kivel, N., Koehler, P., Kokkoris, M., Kroll, J., Lampoudis, C., Langer, C., Leal-Cidoncha, E., Lederer, C., Leeb, H., Leong, L.S., Lerendegui-Marco, J., Losito, R., Mallick, A., Manousos, A., Marganiec, J., Martínez, T., Massimi, C., Mastinu, P., Mastromarco, M., Mengoni, A., Milazzo, P.M., Mingrone, F., Mirea, M., Mondelaers, W., Paradela, C., Pavlik, A., Perkowski, J., Plompen, A.J.M., Praena, J., Quesada, J.M., Rauscher, T., Reifarth, R., Riego-Perez, A., Robles, M., Rubbia, C., Ryan, J.A., Sabaté-Gilarte, M., Sarmento, R., Saxena, A., Schillebeeckx, P., Schmidt, S., Schumann, D., Sedyshev, P., Tagliente, G., Tain, J.L., Tarifeño-Saldivia, A., 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., 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, 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
Nuclear Reactions, Nuclear Physics - Experiment, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]
Abstract

International audience; We measured the neutron capture-to-fission cross-section ratio (α ratio) and the capture cross section of U235 between 0.2 and 200 eV at the n_TOF facility at CERN. The simultaneous measurement of neutron-induced capture and fission rates was performed by means of the n_TOF BaF2 Total Absorption Calorimeter (TAC), used for detection of γ rays, in combination with a set of micromegas detectors used as fission tagging detectors. The energy dependence of the capture cross section was obtained with help of the Li6(n,t) standard reaction determining the n_TOF neutron fluence; the well-known integral of the U235(n,f) cross section between 7.8 and 11 eV was then used for its absolute normalization. The α ratio, obtained with slightly higher statistical fluctuations, was determined directly, without need for any reference cross section. To perform the analysis of this measurement we developed a new methodology to correct the experimentally observed effect that the probabilities of detecting a fission reaction in the TAC and the micromegas detectors are not independent. The results of this work have been used in a new evaluation of U235 performed within the scope of the Collaborative International Evaluated Library Organisation (CIELO) Project, and are consistent with the ENDF/B-VIII.0 and JEFF-3.3 capture cross sections below 4 eV and above 100 eV. However, the measured capture cross section is on average 10% larger between 4 and 100 eV.

Published
2020

46. Investigation of the $^{240}$Pu(n,f) reaction at the n_TOF/EAR2 facility in the 9 meV-6 MeV range

Author

n_TOF Collaboration, Stamatopoulos, A., Tsinganis, A., Colonna, N., Kokkoris, M., Vlastou, R., Diakaki, M., Žugec, P., Schillebeeckx, P., Gunsing, F., Sabaté-Gilarte, M., Barbagallo, M., Aberle, O., Andrzejewski, J., Audouin, L., Bécares, V., Bacak, M., Balibrea, J., Barros, S., Bečvář, F., Beinrucker, C., Belloni, F., Berthoumieux, E., Billowes, J., Bosnar, D., Brugger, M., Caamaño, M., Lo Meo, S., Calviño, F., Calviani, M., Cano-Ott, D., Cerutti, F., Chiaveri, E., Cortés, G., Cortés-Giraldo, M. A., Cosentino, L., Damone, L. A., Deo, K., Domingo-Pardo, C., Dressler, R., Dupont, E., Durán, I., Fernández-Domínguez, B., Ferrari, A., Ferreira, P., Finocchiaro, P., Frost, R. J. W., Furman, V., Göbel, K., García, A. R., Gheorghe, I., Glodariu, T., Gonçalves, I. F., González-Romero, E., Goverdovski, A., Griesmayer, E., Guerrero, C., Harada, H., Heftrich, T., Heinitz, S., Hernández-Prieto, A., Heyse, J., Jenkins, D. G., Jericha, E., Käppeler, F., Kadi, Y., Katabuchi, T., Kavrigin, P., Ketlerov, V., Khryachkov, V., Kimura, A., Kivel, N., Knapova, I., Krtička, M., Leal-Cidoncha, E., Lederer, C., Leeb, H., Lerendegui-Marco, J., Licata, M., Losito, R., Macina, D., Marganiec, J., Martínez, T., Massimi, C., Mastinu, P., Mastromarco, M., Matteucci, F., Mendoza, E., Mengoni, A., Milazzo, P. M., Mingrone, F., Mirea, M., Montesano, S., Musumarra, A., Nolte, R., Palomo-Pinto, F. R., Paradela, C., Patronis, N., Pavlik, A., Perkowski, J., Plompen, A., Porras, J. I., Praena, J., Quesada, J. M., Rauscher, T., Reifarth, R., Riego-Perez, A., Robles, M., Rubbia, C., Ryan, J. A., Saxena, A., Schmidt, S., Schumann, D., Sedyshev, P., Smith, A. G., Suryanarayana, S. V., Tagliente, G., Tain, J. L., Tarifeño-Saldivia, A., Tassan-Got, L., Valenta, S., Vannini, G., Variale, V., Vaz, P., Ventura, A., Vlachoudis, V., Wallner, A., Warren, S., Weigand, M., Weiss, C., and Wright, T.

Subjects
Physics, ddc:530, Nuclear Experiment
Abstract

Background: Nuclear waste management is considered amongst the major challenges in the field of nuclear energy. A possible means of addressing this issue is waste transmutation in advanced nuclear systems, whose operation requires a fast neutron spectrum. In this regard, the accurate knowledge of neutron-induced reaction cross sections of several (minor) actinide isotopes is essential for design optimization and improvement of safety margins of such systems. One such case is $^{240}$Pu, due to its accumulation in spent nuclear fuel of thermal reactors and its usage in fast reactor fuel. The measurement of the $^{240}$Pu(n,f) cross section was previously attempted at the CERN n_TOF facility EAR1 measuring station using the time-of-flight technique. Due to the low amount of available material and the given flux at EAR1, the measurement had to last several months to achieve a sufficient statistical accuracy. This long duration led to detector deterioration due to the prolonged exposure to the high α activity of the fission foils, therefore the measurement could not be successfully completed. Purpose: It is aimed to determine whether it is feasible to study neutron-induced fission at n_TOF/EAR2 and provide data on the $^{240}$Pu(n,f) reaction in energy regions requested for applications. Methods: The study of the $^{240}$Pu(n,f) reaction was made at a new experimental area (EAR2) with a shorter flight path which delivered on average 30 times higher flux at fast neutron energies. This enabled the measurement to be performed much faster, thus limiting the exposure of the detectors to the intrinsic activity of the fission foils. The experimental setup was based on microbulk Micromegas detectors and the time-of-flight data were analyzed with an optimized pulse-shape analysis algorithm. Special attention was dedicated to the estimation of the non-negligible counting loss corrections with the development of a new methodology, and other corrections were estimated via Monte Carlo simulations of the experimental setup. Results: This new measurement of the $^{240}$Pu(n,f) cross section yielded data from 9 meV up to 6 MeV incident neutron energy and fission resonance kernels were extracted up to 10 keV. Conclusions: Neutron-induced fission of high activity samples can be successfully studied at the n_TOF/EAR2 facility at CERN covering a wide range of neutron energies, from thermal to a few MeV.

Published
2020

47. Measurement of the 242Pu(n, γ) cross section from thermal to 500 keV at the Budapest research reactor and CERN n_TOF-EAR1 facilities

Author

Lerendegui-Marco, J., Guerrero, C., Mendoza, E., Quesada, J. M., Eberhardt, K., Junghans, A., Krtiička, M., Belgya, T., Maróti, B., Aberle, O., Andrzejewski, J., Audouin, L., Bécares, V., Bacak, M., Balibrea, J., Barbagallo, M., Barros, S., Bečvář, F., Beinrucker, C., Berthoumieux, E., Billowes, J., Bosnar, D., Brugger, M., Caamaño, M., Calviño, F., Calviani, M., Cano-Ott, D., Cardella, R., Casanovas, A., Castelluccio, D. M., Cerutti, F., Chen, Y. H., Chiaveri, E., Colonna, N., Cortés, G., Cortés-Giraldo, M. A., Cosentino, L., Damone, L. A., Diakaki, M., Domingo-Pardo, C., Dressler, R., Dupont, E., Durán, I., Fernández-Domínguez, B., Ferrari, A., Ferreira, P., Finocchiaro, P., Furman, V., Göbel, K., García, A. R., Gawlik, A., Glodariu, T., Gonçalves, I. F., González-Romero, E., Goverdovski, A., Griesmayer, E., Gunsing, F., Harada, H., Heftrich, T., Heinitz, S., Heyse, J., Jenkins, D. G., Jericha, E., Käppeler, F., Kadi, Y., Katabuchi, T., Kavrigin, P., Ketlerov, V., Khryachkov, V., Kimura, A., Kivel, N., Knapova, I., Kokkoris, M., Leal-Cidoncha, E., Lederer, C., Leeb, H., Lo Meo, S., Lonsdale, S. J., Losito, R., Macina, D., Marganiec, J., Martínez, T., Massimi, C., Mastinu, P., Mastromarco, M., Matteucci, F., Maugeri, E. A., Mengoni, A., Milazzo, P. M., Mingrone, F., Mirea, M., Montesano, S., Musumarra, A., Nolte, R., Oprea, A., Patronis, N., Pavlik, A., Perkowski, J., Porras, J. I., Praena, J., Rajeev, K., Rauscher, T., Reifarth, R., Riego-Perez, A., Rout, P. C., Rubbia, C., Ryan, J. A., Sabaté-Gilarte, M., Saxena, A., Schillebeeckx, P., Schmidt, S., Schumann, D., Sedyshev, P., Smith, A. G., Stamatopoulos, A., Tagliente, G., Tain, J. L., Tarifeño-Saldivia, A., Tassan-Got, L., Tsinganis, A., Valenta, S., Vannini, G., Variale, V., Vaz, P., Ventura, A., Vescovi, D., Vlachoudis, V., Vlastou, R., Wallner, A., Warren, S., Weigand, M., Weiss, C., Wolf, C., Woods, P. J., Wright, T., Žugec, P., and The N_TOF Collaboration

Abstract

The design and operation of innovative nuclear systems requires a better knowledge of the capture and fission cross sections of the Pu isotopes. For the case of capture on 242Pu, a reduction of the uncertainty in the fast region down to 8-12% is required. Moreover, aiming at improving the evaluation of the fast energy range in terms of average parameters, the OECD NEA High Priority Request List (HPRL) requests high-resolution capture measurements with improved accuracy below 2 keV. The current uncertainties also affect the thermal point, where previous experiments deviate from each other by 20%. A fruitful collaboration betwen JGU Mainz and HZ Dresden-Rossendorf within the EC CHANDA project resulted in a 242Pu sample consisting of a stack of seven fission-like targets making a total of 95(4) mg of 242Pu electrodeposited on thin (11.5 μm) aluminum backings. This contribution presents the results of a set of measurements of the 242Pu(n, γ) cross section from thermal to 500 keV combining different neutron beams and techniques. The thermal point was determined at the Budapest Research Reactor by means of Neutron Activation Analysis and Prompt Gamma Analysis, and the resolved (1 eV - 4 keV) and unresolved (1 - 500 keV) resonance regions were measured using a set of four Total Energy detectors at the CERN n_TOF-EAR1.

Published
2020

48. Preparation and characterization of 33S samples for 33S(n,α)30Si cross-section measurements at the n_TOF facility at CERN

Author

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

Subjects
Physics, Nuclear and High Energy Physics, Thin layers, 010308 nuclear & particles physics, Analytical chemistry, chemistry.chemical_element, Rutherford backscattering spectrometry, 7. Clean energy, 01 natural sciences, Copper, Kapton, Chromium, chemistry, 0103 physical sciences, Sublimation (phase transition), Neutron, 010306 general physics, Instrumentation, Titanium
Abstract

Thin 33S samples for the study of the 33S(n, α)30Si cross-section at the n_TOF facility at CERN were made by thermal evaporation of 33S powder onto a dedicated substrate made of kapton covered with thin layers of copper, chromium and titanium. This method has provided for the first time bare sulfur samples a few centimeters in diameter. The samples have shown an excellent adherence with no mass loss after few years and no sublimation in vacuum at room temperature. The determination of the mass thickness of 33S has been performed by means of Rutherford backscattering spectrometry. The samples have been successfully tested under neutron irradiation.

Published
2018

49. Measurement of 73Ge(n,γ) cross sections and implications for stellar nucleosynthesis

Author

Lederer-Woods, C., Battino, U., Ferreira, P., Gawlik, A., Guerrero, C., Gunsing, F., Heinitz, S., Lerendegui-Marco, J., Mengoni, A., Reifarth, R., Tattersall, A., Valenta, S., Weiss, C., Aberle, O., Andrzejewski, J., Audouin, L., Bécares, V., Bacak, M., Balibrea, J., Barbagallo, M., Barros, S., Bečvář, F., Beinrucker, C., Belloni, F., Berthoumieux, E., Billowes, J., Bosnar, D., Brugger, M., Caamaño, M., Calviño, F., Calviani, M., Cano-Ott, D., Cerutti, F., Chiaveri, E., Colonna, N., Cortés, G., Cortés-Giraldo, M.A., Cosentino, L., Damone, L.A., Deo, K., Diakaki, M., Dietz, M., Domingo-Pardo, C., Dressler, R., Dupont, E., Durán, I., Fernández-Domínguez, B., Ferrari, A., Finocchiaro, P., Frost, R.J.W., Furman, V., Göbel, K., García, A.R., Gheorghe, I., Glodariu, T., Gonçalves, I.F., González-Romero, E., Goverdovski, A., Griesmayer, E., Harada, H., Heftrich, T., Hernández-Prieto, A., Heyse, J., Jenkins, D.G., Jericha, E., Käppeler, F., Kadi, Y., Katabuchi, T., Kavrigin, P., Ketlerov, V., Khryachkov, V., Kimura, A., Kivel, N., Knapova, I., Kokkoris, M., Krtička, M., Leal-Cidoncha, E., Leeb, H., Licata, M., Lo Meo, S., Losito, R., Macina, D., Marganiec, J., Martínez, T., Massimi, C., Mastinu, P., Mastromarco, M., Matteucci, F., Mendoza, E., Milazzo, P.M., Mingrone, F., Mirea, M., Montesano, S., Musumarra, A., Nolte, R., Palomo-Pinto, F.R., Paradela, C., Patronis, N., Pavlik, A., Perkowski, J., Porras, J.I., Praena, J., Quesada, J.M., Rauscher, T., Riego-Perez, A., Robles, M., Rubbia, C., Ryan, J.A., Sabaté-Gilarte, M., Saxena, A., Schillebeeckx, P., Schmidt, S., Schumann, D., Sedyshev, P., Smith, A.G., Stamatopoulos, A., Suryanarayana, S.V., Tagliente, G., Tain, J.L., Tarifeño-Saldivia, A., Tassan-Got, L., Tsinganis, A., Vannini, G., Variale, V., Vaz, P., Ventura, A., Vlachoudis, V., Vlastou, R., Wallner, A., Warren, S., Weigand, M., Wright, T., and Žugec, P.

Published
2019
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50. Preparation and characterization of33S samples for33S(n,α)30Si cross-section measurements at the n_TOF facility at CERN

Author

Praena, J., Ferrer, F. J., Vollenberg, W., Sabaté-Gilarte, M., Fernández, B., García-López, J., Porras, I., Quesada, J. M., Altstadt, S., Andrzejewski, J., Audouin, L., Bécares, V., Barbagallo, M., Bečvář, F., Belloni, F., Berthoumieux, E., Billowes, J., Boccone, V., Bosnar, D., Brugger, M., Calviño, F., Calviani, M., Cano-Ott, D., Carrapiço, C., Cerutti, F., Chiaveri, E., Chin, M., Colonna, N., Cortés, G., Cortés-Giraldo, M. A., Diakaki, M., Dietz, M., Domingo-Pardo, C., Dressler, R., Durán, I., Eleftheriadis, C., Ferrari, A., Fraval, K., Furman, V., Göbel, K., Gómez-Hornillos, M. B., Ganesan, S., García, A. R., Giubrone, G., Gonçalves, I. F., González-Romero, E., Goverdovski, A., Griesmayer, E., Guerrero, C., Gunsing, F., Heftrich, T., Hernández-Prieto, A., Heyse, J., Jenkins, D. G., Jericha, E., Käppeler, F., Kadi, Y., Karadimos, D., Katabuchi, T., Ketlerov, V., Khryachkov, V., Kivel, N., Koehler, P., Kokkoris, M., Kroll, J., Krtička, M., Lampoudis, C., Langer, C., Leal-Cidoncha, E., Lederer, C., Leeb, H., Leong, L. S., Lerendegui-Marco, J., Losito, R., Mallick, A., Manousos, A., Marganiec, J., Martínez, T., Massimi, C., Mastinu, P., Mastromarco, M., Mendoza, E., Mengoni, A., Milazzo, P. M., Mingrone, F., Mirea, M., Mondelaers, W., Paradela, C., Pavlik, A., Perkowski, J., Plompen, A. J. M., Rauscher, T., Reifarth, R., Riego-Perez, A., Robles, M., Rubbia, C., Ryan, J. A., Sarmento, R., Saxena, A., Schillebeeckx, P., Schmidt, S., Schumann, D., Sedyshev, P., Tagliente, G., Tain, J. L., Tarifeño-Saldivia, A., 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., Praena, J., Ferrer, F.J., Vollenberg, W., Sabaté-Gilarte, M., Fernández, B., García-López, J., Porras, I., Quesada, J.M., Altstadt, S., Andrzejewski, J., Audouin, L., Bécares, V., Barbagallo, M., Bečvář, F., Belloni, F., Berthoumieux, E., Billowes, J., Boccone, V., Bosnar, D., Brugger, M., Calviño, F., Calviani, M., Cano-Ott, D., Carrapiço, C., Cerutti, F., Chiaveri, E., Chin, M., Colonna, N., Cortés, G., Cortés-Giraldo, M.A., Diakaki, M., Dietz, M., Domingo-Pardo, C., Dressler, R., Durán, I., Eleftheriadis, C., Ferrari, A., Fraval, K., Furman, V., Göbel, K., Gómez-Hornillos, M.B., Ganesan, S., García, A.R., Giubrone, G., Gonçalves, I.F., González-Romero, E., Goverdovski, A., Griesmayer, E., Guerrero, C., Gunsing, F., Heftrich, T., Hernández-Prieto, A., Heyse, J., Jenkins, D.G., Jericha, E., Käppeler, F., Kadi, Y., Karadimos, D., Katabuchi, T., Ketlerov, V., Khryachkov, V., Kivel, N., Koehler, P., Kokkoris, M., Kroll, J., Krtička, M., Lampoudis, C., Langer, C., Leal-Cidoncha, E., Lederer, C., Leeb, H., Leong, L.S., Lerendegui-Marco, J., Losito, R., Mallick, A., Manousos, A., Marganiec, J., Martínez, T., Massimi, C., Mastinu, P., Mastromarco, M., Mendoza, E., Mengoni, A., Milazzo, P.M., Mingrone, F., Mirea, M., Mondelaers, W., Paradela, C., Pavlik, A., Perkowski, J., Plompen, A.J.M., Rauscher, T., Reifarth, R., Riego-Perez, A., Robles, M., Rubbia, C., Ryan, J.A., Sarmento, R., Saxena, A., Schillebeeckx, P., Schmidt, S., Schumann, D., Sedyshev, P., Tagliente, G., Tain, J.L., Tarifeño-Saldivia, A., 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
Rutherford backscattering, Thermal evaporation, Neutron induced alpha emission, Instrumentation, Nuclear and High Energy Physic
Abstract

Thin33S samples for the study of the33S(n,α)30Si cross-section at the n_TOF facility at CERN were made by thermal evaporation of33S powder onto a dedicated substrate made of kapton covered with thin layers of copper, chromium and titanium. This method has provided for the first time bare sulfur samples a few centimeters in diameter. The samples have shown an excellent adherence with no mass loss after few years and no sublimation in vacuum at room temperature. The determination of the mass thickness of33S has been performed by means of Rutherford backscattering spectrometry. The samples have been successfully tested under neutron irradiation.

Published
2018

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