1,694 results on '"Plompen, A."'
Search Results
2. NEBOAS: A Neutron yiElds Based On AcceleratorS application
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Macías, M., Bonaldi, C., Fontana, C.L., Geerts, W., Plompen, A.J.M., Oberstedt, S., and Vidali, M.
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- 2024
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3. HPRL -- International cooperation to identify and monitor priority nuclear data needs for nuclear applications
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Dupont, E., Bossant, M., Capote, R., Carlson, A. D., Danon, Y., Fleming, M., Ge, Z., Harada, H., Iwamoto, O., Iwamoto, N., Kimura, A., Koning, A. J., Massimi, C., Negret, A., Noguere, G., Plompen, A., Pronyaev, V., Rimpault, G., Simakov, S., Stankovskiy, A., Sun, W., Trkov, A., Wu, H., and Yokoyama, K.
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Nuclear Experiment - Abstract
The OECD-NEA High Priority Request List (HPRL) is a point of reference to guide and stimulate the improvement of nuclear data for nuclear energy and other applications, and a tool to bridge the gap between data users and producers. The HPRL is application-driven and the requests are submitted by nuclear data users or representatives of the user's communities. A panel of international experts reviews and monitors the requests in the framework of an Expert Group mandated by the NEA Nuclear Science Committee Working Party on International Nuclear Data Evaluation Cooperation (WPEC). After approval, individual requests are classified to three categories: high priority requests, general requests, and special purpose requests (e.g., dosimetry, standards). The HPRL is hosted by the NEA in the form of a relational database publicly available on the web. This paper provides an overview of HPRL entries, status and outlook. Examples of requests successfully completed are given and new requests are described with emphasis on updated nuclear data needs in the fields of nuclear energy, neutron standards and dosimetry., Comment: submitted to EPJ Web of Conferences for the proceedings of the ND2019 International Conference on Nuclear Data for Science and Technology (Beijing ,China, May 19 - 24, 2019)
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- 2020
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4. NEBOAS: A Neutron yiElds Based On AcceleratorS application.
- Author
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Miguel Macías, C. Bonaldi, C. L. Fontana, W. Geerts, A. J. M. Plompen, S. Oberstedt, and M. Vidali
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- 2024
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5. Experimental setup of the 239Pu neutron capture and fission cross-section measurements at n_TOF, CERN
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Sanchez-Caballero Adrian, Alcayne Victor, Andrzejewski Józef, Cano-Ott Daniel, Cardinaels Thomas, Dries Peter, Gawlik-Ramiega Aleksandra, González-Romero Enrique, Heyse Jan, Leinders Gregory, Martínez Trinitario, Mendoza Emilio, Moens Andre, Pérez de Rada Alberto, Perkowski Jarosław, Plompen Arjan, Paradela Carlos, Schillebeeckx Peter, Sibbens Goedele, Van Hecke Karen, Vanaken Koen, Vanleeuw David, Verguts Ken, Verwerft Marc, Wynants Ruud, Aberle Oliver, Altieri Saverio, Amaducci Simone, Babiano-Suarez Victor, Bacak Michael, Balibrea Correa Javier, Beltrami Chiara, Bennett Samuel, Bernardes Ana-Paula, Berthoumieux Eric, Beyer Roland, Boromiza Marian, Bosnar Damir, Caamaño Manuel, Calviño Francisco, Calviani Marco, Casanovas Adria, Castelluccio Donato, Cerutti Francesco, Cescutti Gabriele, Chasapoglou Sotirios, Chiaveri Enrico, Colombetti Paolo, Colonna Nicola, Console Camprini Patrizio, Cortés Guillem, Cortés-Giraldo Miguel, Cosentino Luigi, Cristallo Sergio, Dellmann, Di Castro Mario, Di Maria Salvatore, Diakaki Maria, Dietz Mirco, Domingo-Pardo César, Dressler Rugard, Dupont Emmeric, Durán Ignacio, Eleme Zinovia, Fargier Sylvain, Fernández Begoña, Fernández-Domínguez Beatriz, Finocchiaro Paolo, Fiore Salvatore, Furman Valter, García-Infantes Francisco, Gervino Gianpiero, Gilardoni Simone, Guerrero Carlos, Gunsing Frank, Gustavino Carlo, Hillman William, Jenkins David, Jericha Erwin, Junghans Arnd, Kadi Yacine, Kaperoni Kalliopi, Kaur Gurpreet, Kimura Atsushi, Knapová Ingrid, Kokkoris Michael, Kopatch Yury, Krtička Milan, Kyritsis Nikolaos, Ladarescu Ion, Lederer-Woods Claudia, Lerendegui-Marco Jorge, Lerner Giuseppe, Manna Alice, Masi Alessandro, Massimi Cristian, Mastinu Pierfrancesco, Mastromarco Mario, Maugeri Emilio-Andrea, Mazzone Annamaria, Mengoni Alberto, Michalopoulou Veatriki, Milazzo Paolo, Mucciola Riccardo, Murtas Fabrizio, Musacchio-Gonzalez Elizabeth, Musumarra Agatino, Negret Alexandru, Pérez-Maroto Pablo, Patronis Nikolas, Pavón-Rodríguez José-Antonio, Pellegriti Maria, Petrone Cristina, Pirovano Elisa, Plaza del Olmo Julio, Pomp Stephan, Porras Ignacio, Praena Javier, Quesada José-Manuel, Reifarth René, Rochman Dimitri, Romanets Yuriy, Rubbia Carlo, Sabaté-Gilarte Marta, Schumann Dorothea, Sekhar Adhitya, Smith Gavin, Sosnin Nikolay, Stamati Maria-Elisso, Sturniolo Alessandro, Tagliente Giuseppe, Tarifeño-Saldivia Ariel, Tarrío Diego, Torres-Sánchez Pablo, Vagena, Valenta Stanislav, Variale Vincenzo, Vaz Pedro, Vecchio Gianfranco, Vescovi Diego, Vlachoudis Vasilis, Vlastou Rosa, Wallner Anton, Woods Philip-John, Wright Tobias, Zarrella Roberto, and Žugec Petar
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Physics ,QC1-999 - Abstract
The experimental setup of the new measurement of 239Pu fission and capture cross-section in the n_TOF time-of-flight facility at CERN is presented. The measurement aims to address the needs and demands of nuclear data users. The experiment incorporates an innovative fast Fission Fragment Detector and the n_TOF Total Absorption Calorimeter, enabling the implementation of the fission tagging technique. Preliminary results exhibit the robust performance of the detector systems, along with the high quality of the new 239Pu samples. These samples were exclusively produced for this measurement by the European Commission’s Joint Research Centre in Geel.
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- 2024
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6. Medical radionuclide research activities at JRC-Geel
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Tsinganis Andrea, Crespo Pablo Serra, Plompen Arjan, Heyse Jan, Oberstedt Stephan, Moreno Ana Ruiz, and Fumagalli Francesco
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Physics ,QC1-999 - Abstract
A programme to study photon- and neutron-induced reactions of medical interest, as well as accelerator-based methods of medical radionuclide production, has been instituted at JRC-Geel, making use of both existing and new infrastructure. A new electron beamline that can deliver quasi-monoenergetic beams has been commissioned at the GELINA electron linac and will be primarily dedicated to the study of photonuclear reactions and for medical radioisotope production studies via photon irradiation. The recently renewed MONNET 3.5 MV Tandem accelerator provides light ion beams for reactionbased quasi-mono-energetic neutron production and has been used for the study of 99Mo production via neutron irradiation of molybdenum nanoparticles. In this work we present an overview of the medical radionuclide activities at JRCGeel, with particular attention to aspects of the design, development and operational challenges of the new GELINA electron beamline. Some future perspectives of the programme are also discussed.
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- 2024
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7. Uncertainties of calculated coincidence-summing correction factors in gamma-ray spectrometry
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Semkova, V., Otuka, N., and Plompen, A. J. M.
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Physics - Instrumentation and Detectors ,Nuclear Experiment - Abstract
Uncertainty propagation to the $\gamma$-$\gamma$ coincidence-summing correction factor from the covariances of the nuclear data and detection efficiencies have been formulated. The method was applied in the uncertainty analysis of the coincidence-summing correction factors in the $\gamma$-ray spectrometry of the $^{134}$Cs point source using a p-type coaxial HPGe detector., Comment: 4 pages, 2 figures, to be published in the proceedings of the "2019 International Conference on Nuclear Data for Science and Technology" (ND2019)
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- 2019
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8. 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)
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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.
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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.
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- 2018
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9. Low-Power High-Linearity Mixer-First Receiver Using Implicit Capacitive Stacking With 3× Voltage Gain.
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Vijaya Kumar Purushothaman, Eric A. M. Klumperink, Roel Plompen, and Bram Nauta
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- 2022
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10. Neutron induced fission cross section measurements of 240242Pu and 240242Pu relative to the neutron–proton scattering cross section at 2.5 and 14.8 MeV
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Belloni, F., Eykens, R., Heyse, J., Matei, C., Moens, A., Nolte, R., Plompen, A. J. M., Richter, S., Sibbens, G., Vanleeuw, D., and Wynants, R.
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- 2022
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11. Neutron capture cross section measurement of 238U at the n TOF CERN facility with C6D6 scintillation detectors in the energy region from 1 eV to 700 keV
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Collaboration, n_TOF, Mingrone, F., Massimi, C., Vannini, G., Colonna, N., Gunsing, F., Žugec, P., Altstadt, S., Andrzejewski, J., Audouin, L., Barbagallo, M., Bécares, V., Bečvář, F., Belloni, F., Berthoumieux, E., Billowes, J., Bosnar, D., Brugger, M., Calviani, M., Calviño, F., Cano-Ott, D., Carrapiço, C., Cerutti, F., Chiaveri, E., Chin, M., Cortés, G., Cortés-Giraldo, M. A., Diakaki, M., Domingo-Pardo, C., Duran, I., Dressler, R., Eleftheriadis, C., Ferrari, A., Fraval, K., Ganesan, S., García, A. R., Giubrone, G., Gonçalves, I. F., González-Romero, E., Griesmayer, E., Guerrero, C., Hernández-Prieto, A., Jenkins, D. G., Jericha, E., Kadi, Y., Käppeler, F., Karadimos, D., Kivel, N., Koehler, P., Kokkoris, M., Krtička, 1 M., Kroll, J., Lampoudis, C., Langer, C., Leal-Cidoncha, E., Lederer, C., Leeb, H., Leong, L. S., Meo, S. Lo, Losito, R., Mallick, A., Manousos, A., Marganiec, J., Martínez, T., Mastinu, P. F., Mastromarco, M., Mendoza, E., Mengoni, A., Milazzo, P. M., Mirea, M., Mondalaers, W., Paradela, C., Pavlik, A., Perkowski, J., Plompen, A., Praena, J., Quesada, J. M., Rauscher, T., Reifarth, R., Riego, A., Robles, M. S., Rubbia, C., Sabaté-Gilarte, M., Sarmento, R., Saxena, A., Schillebeeckx, P., Schmidt, S., Schumann, D., Tagliente, G., Tain, J. L., Tarrío, D., Tassan-Got, L., Tsinganis, A., Valenta, S., Variale, V., Vaz, P., Ventura, A., Vermeulen, M. J., Vlachoudis, V., Vlastou, R., Wallner, A., Ware, T., Weigand, M., Weiß, C., and Wright, T.
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Nuclear Experiment - Abstract
The aim of this work is to provide a precise and accurate measurement of the 238U(n,g) reaction cross section in the energy region from 1 eV to 700 keV. This reaction is of fundamental importance for the design calculations of nuclear reactors, governing the behaviour of the reactor core. In particular, fast reactors, which are experiencing a growing interest for their ability to burn radioactive waste, operate in the high energy region of the neutron spectrum. In this energy region most recent evaluations disagree due to inconsistencies in the existing measurements of up to 15%. In addition, the assessment of nuclear data uncertainty performed for innovative reactor systems shows that the uncertainty in the radiative capture cross-section of 238U should be further reduced to 1-3% in the energy region from 20 eV to 25 keV. To this purpose, addressed by the Nuclear Energy Agency as a priority nuclear data need, complementary experiments, one at the GELINA and two at the n_TOF facility, were proposed and carried out within the 7th Framework Project ANDES of the European Commission. The results of one of these 238U(n,g) measurements performed at the n_TOF CERN facility are presented in this work. The gamma-ray cascade following the radiative neutron capture has been detected exploiting a setup of two C6D6 liquid scintillators. Resonance parameters obtained from this work are on average in excellent agreement with the ones reported in evaluated libraries. In the unresolved resonance region, this work yields a cross section in agreement with evaluated libraries up to 80 keV, while for higher energies our results are significantly higher., Comment: 15 pages, 10 captioned figures
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- 2016
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12. ENDF/B-VIII.0: The 8th Major Release of the Nuclear Reaction Data Library with CIELO-project Cross Sections, New Standards and Thermal Scattering Data
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Brown, DA, Chadwick, MB, Capote, R, Kahler, AC, Trkov, A, Herman, MW, Sonzogni, AA, Danon, Y, Carlson, AD, Dunn, M, Smith, DL, Hale, GM, Arbanas, G, Arcilla, R, Bates, CR, Beck, B, Becker, B, Brown, F, Casperson, RJ, Conlin, J, Cullen, DE, Descalle, M-A, Firestone, R, Gaines, T, Guber, KH, Hawari, AI, Holmes, J, Johnson, TD, Kawano, T, Kiedrowski, BC, Koning, AJ, Kopecky, S, Leal, L, Lestone, JP, Lubitz, C, Damián, JI Márquez, Mattoon, CM, McCutchan, EA, Mughabghab, S, Navratil, P, Neudecker, D, Nobre, GPA, Noguere, G, Paris, M, Pigni, MT, Plompen, AJ, Pritychenko, B, Pronyaev, VG, Roubtsov, D, Rochman, D, Romano, P, Schillebeeckx, P, Simakov, S, Sin, M, Sirakov, I, Sleaford, B, Sobes, V, Soukhovitskii, ES, Stetcu, I, Talou, P, Thompson, I, van der Marck, S, Welser-Sherrill, L, Wiarda, D, White, M, Wormald, JL, Wright, RQ, Zerkle, M, Žerovnik, G, and Zhu, Y
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Nuclear and Plasma Physics ,Synchrotrons and Accelerators ,Physical Sciences ,Rare Diseases ,Affordable and Clean Energy ,Atomic ,Molecular ,Nuclear ,Particle and Plasma Physics ,Nuclear & Particles Physics ,Nuclear and plasma physics - Abstract
We describe the new ENDF/B-VIII.0 evaluated nuclear reaction data library. ENDF/B-VIII.0 fully incorporates the new IAEA standards, includes improved thermal neutron scattering data and uses new evaluated data from the CIELO project for neutron reactions on 1H, 16O, 56Fe, 235U, 238U and 239Pu described in companion papers in the present issue of Nuclear Data Sheets. The evaluations benefit from recent experimental data obtained in the U.S. and Europe, and improvements in theory and simulation. Notable advances include updated evaluated data for light nuclei, structural materials, actinides, fission energy release, prompt fission neutron and γ-ray spectra, thermal neutron scattering data, and charged-particle reactions. Integral validation testing is shown for a wide range of criticality, reaction rate, and neutron transmission benchmarks. In general, integral validation performance of the library is improved relative to the previous ENDF/B-VII.1 library.
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- 2018
13. Experimental setup of the 239Pu neutron capture and fission cross-section measurements at n_TOF, CERN.
- Author
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Sanchez-Caballero, Adrian, Alcayne, Victor, Andrzejewski, Józef, Cano-Ott, Daniel, Cardinaels, Thomas, Dries, Peter, Gawlik-Ramiega, Aleksandra, González-Romero, Enrique, Heyse, Jan, Leinders, Gregory, Martínez, Trinitario, Mendoza, Emilio, Moens, Andre, Pérez de Rada, Alberto, Perkowski, Jarosław, Plompen, Arjan, Paradela, Carlos, Schillebeeckx, Peter, Sibbens, Goedele, and Van Hecke, Karen
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NEUTRON capture ,NUCLEAR cross sections ,NUCLEAR fission ,NUCLEAR physics experiments - Abstract
The experimental setup of the new measurement of
239 Pu fission and capture cross-section in the n_TOF time-of-flight facility at CERN is presented. The measurement aims to address the needs and demands of nuclear data users. The experiment incorporates an innovative fast Fission Fragment Detector and the n_TOF Total Absorption Calorimeter, enabling the implementation of the fission tagging technique. Preliminary results exhibit the robust performance of the detector systems, along with the high quality of the new239 Pu samples. These samples were exclusively produced for this measurement by the European Commission's Joint Research Centre in Geel. [ABSTRACT FROM AUTHOR]- Published
- 2024
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14. Cross section measurements of neutron elastic and inelastic scattering on Fe54
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Gkatis, G., primary, Diakaki, M., additional, Noguere, G., additional, Nyman, M., additional, Oprea, A., additional, Paradela, C., additional, Pirovano, E., additional, and Plompen, A. J. M., additional
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- 2024
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15. Neboas: A Neutron Yields Based on Accelerators Application
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Macías, Miguel, primary, Fontana, Cristiano, additional, OBERSTEDT, Stephan, additional, PLOMPEN, Arjan, additional, Bonaldi, Cedric, additional, GEERTS, Wouter, additional, and VIDALI, Marzio, additional
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- 2024
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16. Trunk Movements are Related to Force Plate-Based Outcomes During a Single Leg Dynamic Postural Stability Test
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Vos, Lammert A., primary, Prins, Maarten R., additional, Plompen, Elien, additional, van Dieën, Jaap H., additional, and Kingma, Idsart, additional
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- 2024
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17. Integral measurement of the $^{12}$C(n,p)$^{12}$B reaction up to 10 GeV
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Žugec, P., Colonna, N., Bosnar, D., Ventura, A., Mengoni, A., Altstadt, S., Andrzejewski, J., Audouin, L., Barbagallo, M., Bécares, V., Bečvář, F., Belloni, F., Berthoumieux, E., Billowes, J., Boccone, V., Brugger, M., Calviani, M., Calviño, F., Cano-Ott, D., Carrapiço, C., Cerutti, F., Chiaveri, E., Chin, M., Cortés, G., Cortés-Giraldo, M. A., Cosentino, L., Diakaki, M., Domingo-Pardo, C., Dressler, R., Duran, I., Eleftheriadis, C., Ferrari, A., Finocchiaro, P., Fraval, K., Ganesan, S., García, A. R., Giubrone, G., Gómez-Hornillos, M. B., Gonçalves, I. F., González-Romero, E., Griesmayer, E., Guerrero, C., Gunsing, F., Gurusamy, P., Heinitz, S., Jenkins, D. G., Jericha, E., Käppeler, F., Karadimos, D., Kivel, N., Kokkoris, M., Krtička, M., Kroll, J., Langer, C., Lederer, C., Leeb, H., Leong, L. S., Meo, S. Lo, Losito, R., Manousos, A., Marganiec, J., Martínez, T., Massimi, C., Mastinu, P., Mastromarco, M., Mendoza, E., Milazzo, P. M., Mingrone, F., Mirea, M., Mondalaers, W., Musumarra, A., Paradela, C., Pavlik, A., Perkowski, J., Plompen, A., Praena, J., Quesada, J., Rauscher, T., Reifarth, R., Riego, A., Roman, F., Rubbia, C., Sarmento, R., Saxena, A., Schillebeeckx, P., Schmidt, S., Schumann, D., Tagliente, G., Tain, J. L., Tarrío, D., Tassan-Got, L., Tsinganis, A., Valenta, S., Vannini, G., Variale, V., Vaz, P., Versaci, R., Vermeulen, M. J., Vlachoudis, V., Vlastou, R., Wallner, A., Ware, T., Weigand, M., Weiß, C., and Wright, T.
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Nuclear Experiment - Abstract
The integral measurement of the $^{12}$C(n,p)$^{12}$B reaction was performed at the neutron time of flight facility n_TOF at CERN. The total number of $^{12}$B nuclei produced per neutron pulse of the n_TOF beam was determined using the activation technique in combination with a time of flight technique. The cross section is integrated over the n_TOF neutron energy spectrum from reaction threshold at 13.6 MeV to 10 GeV. Having been measured up to 1 GeV on basis of the $^{235}$U(n,f) reaction, the neutron energy spectrum above 200 MeV has been reevaluated due to the recent extension of the cross section reference for this particular reaction, which is otherwise considered a standard up to 200 MeV. The results from the dedicated GEANT4 simulations have been used to evaluate the neutron flux from 1 GeV up to 10 GeV. The experimental results related to the $^{12}$C(n,p)$^{12}$B reaction are compared with the evaluated cross sections from major libraries and with the predictions of different GEANT4 models, which mostly underestimate the $^{12}$B production. On the contrary, a good reproduction of the integral cross section derived from measurements is obtained with TALYS-1.6 calculations, with optimized parameters., Comment: 14 pages, 11 figures, 3 tables
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- 2016
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18. Measurement and analysis of the Am-243 neutron capture cross section at the n_TOF facility at CERN
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Collaboration, n_TOF, Mendoza, E., Cano-Ott, D., Guerrero, C., Berthoumieux, E., Abbondanno, U., Aerts, G., Alvarez-Velarde, F., Andriamonje, S., Andrzejewski, J., Assimakopoulos, P., Audouin, L., Badurek, G., Balibrea, J., Baumann, P., Becvar, F., Belloni, F., Calvino, F., Calviani, M., Capote, R., Carrapico, C., de Albornoz, A. Carrillo, Cennini, P., Chepel, V., Chiaveri, E., Colonna, N., Cortes, G., Couture, A., Cox, J., Dahlfors, M., David, S., Dillmann, I., Dolfini, R., Domingo-Pardo, C., Dridi, W., Duran, I., Eleftheriadis, C., Ferrant, L., Ferrari, A., Ferreira-Marques, R., Fitzpatrick, L., Frais-Koelbl, H., Fujii, K., Furman, W., Goncalves, I., Gonzalez-Romero, E., Goverdovski, A., Gramegna, F., Griesmayer, E., Gunsing, F., Haas, B., Haight, R., Heil, M., Herrera-Martinez, A., Igashira, M., Isaev, S., Jericha, E., Kappeler, F., Kadi, Y., Karadimos, D., Karamanis, D., Ketlerov, V., Kerveno, M., Koehler, P., Konovalov, V., Kossionides, E., Krticka, M., Lampoudis, C., Leeb, H., Lindote, A., Lopes, I., Lossito, R., Lozano, M., Lukic, S., Marganiec, J., Marques, L., Marrone, S., Martinez, T., Massimi, C., Mastinu, P., Mengoni, A., Milazzo, P. M., Moreau, C., Mosconi, M., Neves, F., Oberhummer, H., Brien, S. O, Oshima, M., Pancin, J., Papachristodoulou, C., Papadopoulos, C., Paradela, C., Patronis, N., Pavlik, A., Pavlopoulos, P., Perrot, L., Pigni, M. T., Plag, R., Plompen, A., Plukis, A., Poch, A., Praena, J., Pretel, C., Quesada, J., Rauscher, T., Reifarth, R., Rosetti, M., Rubbia, C., Rudolf, G., Rullhusen, P., Salgado, J., Santos, C., Sarchiapone, L., Savvidis, I., Stephan, C., Tagliente, G., Tain, J. L., Tassan-Got, L., Tavora, L., Terlizzi, R., Vannini, G., Vaz, P., Ventura, A., Villamarin, D., Vicente, M. C., Vlachoudis, V., Vlastou, R., Voss, F., Walter, S., Wendler, H., Wiescher, M., and Wisshak, K.
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Nuclear Experiment - Abstract
Background:The design of new nuclear reactors and transmutation devices requires to reduce the present neutron cross section uncertainties of minor actinides. Purpose: Reduce the $^{243}$Am(n,$\gamma$) cross section uncertainty. Method: The $^{243}$Am(n,$\gamma$) cross section has been measured at the n_TOF facility at CERN with a BaF$_{2}$ Total Absorption Calorimeter, in the energy range between 0.7 eV and 2.5 keV. Results: The $^{243}$Am(n,$\gamma$) cross section has been successfully measured in the mentioned energy range. The resolved resonance region has been extended from 250 eV up to 400 eV. In the unresolved resonance region our results are compatible with one of the two incompatible capture data sets available below 2.5 keV. The data available in EXFOR and in the literature has been used to perform a simple analysis above 2.5 keV. Conclusions: The results of this measurement contribute to reduce the $^{243}$Am(n,$\gamma$) cross section uncertainty and suggest that this cross section is underestimated up to 25% in the neutron energy range between 50 eV and a few keV in the present evaluated data libraries.
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- 2014
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19. High accuracy determination of the $^{238}$U/$^{235}$U fission cross section ratio up to $\sim$1 GeV at n_TOF (CERN)
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Paradela, C., Calviani, M., Tarrío, D., Leal-Cidoncha, E., Leong, L. S., Tassan-Got, L., Naour, C. Le, Duran, I., Colonna, N., Audouin, L., Mastromarco, M., Meo, S. Lo, Ventura, A., Altstadt, S., Andrzejewski, J., Barbagallo, M., Bécares, V., Bečvář, F., Belloni, F., Berthoumieux, E., Billowes, J., Boccone, V., Bosnar, D., Brugger, M., Calviño, F., Cano-Ott, D., Carrapiço, C., Cerutti, F., Chiaveri, E., Chin, M., Cortés, G., Cortés-Giraldo, M. A., Cosentino, L., Diakaki, M., Domingo-Pardo, C., Dressler, R., Eleftheriadis, C., Ferrari, A., Finocchiaro, P., Fraval, K., Ganesan, S., García, A. R., Giubrone, G., Gómez-Hornillos, M. B., Gonçalves, I. F., González-Romero, E., Griesmayer, E., Guerrero, C., Gunsing, F., Gurusamy, P., Heinitz, S., Jenkins, D. G., Jericha, E., Käppeler, F., Karadimos, D., Kivel, N., Kokkoris, M., Krtička, M., Kroll, J., Langer, C., Lederer, C., Leeb, H., Losito, R., Manousos, A., Marganiec, J., Martínez, T., Massimi, C., Mastinu, P., Mendoza, E., Mengoni, A., Milazzo, P. M., Mingrone, F., Mirea, M., Mondalaers, W., Musumarra, A., Pavlik, A., Perkowski, J., Plompen, A., Praena, J., Quesada, J., Rauscher, T., Reifarth, R., Riego, A., Roman, F., Rubbia, C., Sarmento, R., Saxena, A., Schillebeeckx, P., Schmidt, S., Schumann, D., Tagliente, G., Tain, J. L., Tsinganis, A., Valenta, S., Vannini, G., Variale, V., Vaz, P., Versaci, R., Vermeulen, M. J., Vlachoudis, V., Vlastou, R., Wallner, A., Ware, T., Weigand, M., Weiß, C., Wright, T., and Žugec, P.
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Nuclear Experiment - Abstract
The $^{238}$U to $^{235}$U fission cross section ratio has been determined at n_TOF up to $\sim$1 GeV, with two different detection systems, in different geometrical configurations. A total of four datasets have been collected and compared. They are all consistent to each other within the relative systematic uncertainty of 3-4%. The data collected at n_TOF have been suitably combined to yield a unique fission cross section ratio as a function of the neutron energy. The result confirms current evaluations up to 200 MeV. A good agreement is also observed with theoretical calculations based on the INCL++/Gemini++ combination up to the highest measured energy. The n_TOF results may help solving a long-standing discrepancy between the two most important experimental dataset available so far above 20 MeV, while extending the neutron energy range for the first time up to $\sim$1 GeV.
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- 2014
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20. The past and the future of the GAINS spectrometer @ GELINA
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Olacel Adina, Borcea Catalin, Boromiza Marian, Dessagne Philippe, Henning Greg, Kavatsyuk Myroslav, Kalantar-Nayestanaki Nasser, Kerveno Maëlle, Negret Alexandru, Nyman Markus, Oprea Andreea, Paradela Carlos, and Plompen Arjan
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Physics ,QC1-999 - Abstract
GAINS (Gamma Array for Inelastic Neutron Scattering), currently installed at the GELINA (Geel Electron Linear Accelerator) neutron source of the EC-JRC (European Commission-Joint Research Centre), is one of the best instruments available worldwide for measuring high resolution, low uncertainty neutron inelastic cross-section data relevant for both fundamental research and nuclear physics applications (like Generation IV facilities). It features 12 HPGe detectors coupled with a 235U fission chamber for neutron flux monitoring. The paper presents a short history of the GAINS development over the years and reviews some of the main experimental results together with plans for future experiments.
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- 2023
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21. On the need for precise nuclear structure data for high quality (n, n’γ) cross-section measurements
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Henning Greg, Kerveno Maëlle, Dessagne Philippe, Claeys François, Dari Bako Nicolas, Dupuis Marc, Hilaire Stéphane, Romain Pascal, de Saint Jean Cyrille, Capote Roberto, Boromiza Marian, Olacel Adina, Negret Alexandru, Borcea Catalin, Plompen Arjan, Paradela Dobarro Carlos, and Nyman Markus
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Physics ,QC1-999 - Abstract
The necessary improvement of evaluated nuclear data for nuclear applications development is possible through new and high-quality measurements, often combined with appropriate nuclear-reaction modelling. In particular, improving inelastic cross-section evaluations requires new and high-quality data. We measure (n, n’γ) cross-sections using prompt γ-ray spectroscopy and neutron energy determination by time-of-flight. To extract, from these partial data, the total inelastic cross-section, we rely on theoretical model as well as nuclear structure data such as γ ray emission probabilities. This structure information, tabulated in databases, comes with uncertainty. This directly affects the precision of our results, regardless of how good the measurement is. In this paper, we will present the issue of limited precision structure data and its impact on nuclear reaction data quality in the case of neutron inelastic scattering measurements. We will also discuss how to foresee and mitigate the issue.
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- 2023
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22. Measurement of partial (n, n’γ) reaction cross-sections on highly radioactive nuclei of interest for energy production
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Claeys François, Dessagne Philippe, Kerveno Maëlle, De Saint Jean Cyrille, Borcea Catalin, Boromiza Marian, Capote Roberto, Dari Bako Nicolas, Dupuis Marc, Henning Greg, Hilaire Stéphane, Negret Alexandru, Noguère Gilles, Nyman Markus, Olacel Adina, and Plompen Arjan
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Physics ,QC1-999 - Abstract
In the context of the development of Gen. IV nuclear reactors, the GIF (Generation IV. International Forum) has selected six innovative technologies. Among them, one can highlight the concept of breeding for 232Th/233U and 238U/239Pu fuel cycles. But those nuclei, crucial for such cycles, suffer from a lack of precise knowledge (nuclear structure, reaction cross sections). In particular, it has been demonstrated that neutron inelastic scattering reaction cross sections are not known with sufficient precision for the isotopes 238U and 239Pu, and not known at all experimentally for 233U. In order to perform simulations of innovative reactor cores for the development of those technologies, the knowledge of the reaction cross section has to be improved which implies that new measurements have to be done. The GRAPhEME (GeRmanium array for Actinides PrEcise MEasurements) experimental setup, developed by the IPHC laboratory from CNRS and installed at the EC-JRC-Geel GELINA facility is a powerful tool to answer this need [1, 2]. Combining the prompt γ-ray spectroscopy and the time-of-flight methods, it measures partial (n, xnγ) reaction cross sections. This paper reports on the improvements made on the GRAPhEME setup and data analysis methodology to tackle the challenge of (n, xnγ) cross section measurements on high activity actinides. Results obtained so far on 233U are presented compared to TALYS calculations.
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- 2023
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23. Neutron-induced inelastic γ-production cross sections on 58,60,64Ni
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Boromiza Marian, Olacel Adina, Borcea Catalin, Dessagne Philippe, Henning Greg, Kerveno Maëlle, Negret Alexandru, Nyman Markus, Oprea Andreea, and Plompen Arjan
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Physics ,QC1-999 - Abstract
This paper reports partial results of a (n, n’γ) measurement on nickel. The inelastic channel was measured using the Gamma Array for Inelastic Neutron Scattering (GAINS) spectrometer at the 100-m measurement cabin of the Geel Electron Linear Accelerator (GELINA) neutron source of the European Commission’s Joint Research Centre (EC-JRC) in Geel, Belgium. Using γ spectroscopy, we were able to extract angle-integrated production cross sections for several γ rays but we report here only the results for the main transition in 58Ni. We discuss however in detail the observed discrepancy between our data and other experiments (especially the work of Voss et al.). We also shortly comment on the quality of the neutron-target optical model potential in describing the inelastic data in this mass region. The calculations were performed using the talys 1.9 code in the default settings.
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- 2023
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24. Measurement of 183W(n, n’γ) and (n, 2nγ) cross-sections (preliminary)
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Henning Greg, Maëlle Kerveno, Dessagne Philippe, Claeys François, Dari Bako Nicolas, Dupuis Marc, Hilaire Stephane, Romain Pascal, de Saint Jean Cyrille, Capote Roberto, Boromiza Marian, Olacel Adina, Negret Alexandru, Borcea Catalin, Plompen Arjan, Paradela Dobarro Carlos, Nyman Markus, Drohé Jean-Claude, and Wynants Ruud
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Physics ,QC1-999 - Abstract
The necessary improvement of evaluated nuclear databases for appplication will be achieved with improvement of models and new, precise data. In particular, the effect of inelastic neutrons scattering can be of importance for reactors. In order to test the models, we performed measurement of (n, n’γ) and (n, 2nγ) cross-sections on 183W. These data will help constrain the calculation codes and ensure a better evaluation of the total (n, xn) cross section. The experimental setup and the data analysis method will be presented. The preliminary experimental results for the 183W isotope will be compared to predictions from Talys nuclear reaction code.
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- 2023
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25. Using the Monte-Carlo method to analyze experimental data and produce uncertainties and covariances
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Henning Greg, Kerveno Maëlle, Dessagne Philippe, Claeys François, Dari Bako Nicolas, Dupuis Marc, Hilaire Stephane, Romain Pascal, de Saint Jean Cyrille, Capote Roberto, Boromiza Marian, Olacel Adina, Negret Alexandru, Borcea Catalin, Plompen Arjan, Paradela Dobarro Carlos, Nyman Markus, Drohé Jean-Claude, and Wynants Ruud
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Physics ,QC1-999 - Abstract
The production of useful and high-quality nuclear data requires measurements with high precision and extensive information on uncertainties and possible correlations. Analytical treatment of uncertainty propagation can become very tedious when dealing with a high number of parameters. Even worse, the production of a covariance matrix, usually needed in the evaluation process, will require lenghty and error-prone formulas. To work around these issues, we propose using random sampling techniques in the data analysis to obtain final values, uncertainties and covariances and for analyzing the sensitivity of the results to key parameters. We demonstrate this by one full analysis, one partial analysis and an analysis of the sensitivity to branching ratios in the case of (n,n’γ) cross section measurements.
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- 2023
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26. Activation cross-sections for short-lived reaction products on hafnium isotopes induced by 1 – 20 MeV neutrons
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Semkova Valentina, Demerdjiev Anguel, Moens André, Otuka Naohiko, Plompen Arjan, and Tonev Dimitar
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Physics ,QC1-999 - Abstract
Results of new activation cross-section measurements for production of 178m1Hf (T1/2 = 4.0 s) and 179m1Hf (T1/2 = 18.67 s) are presented for the following reactions: 178Hf(n,n´)178m1Hf, 179Hf(n,2n)178m1Hf, 180Hf(n,3n)178m1Hf, 179Hf(n,n´)179m1Hf, and 180Hf(n,2n)179m1Hf. The irradiations were carried out at the 7-MV Van de Graaff accelerator at EC-JRC, Geel. Neutrons in the 1-3 MeV energy range were produced via the 3H(p,n)3He reaction. Deuteron beam and a deuterium gas target were used to produce 5 and 6 MeV neutrons. For the production of quasi-monoenergetic neutrons between 16 and 19.5 MeV the 3H(d,n)4He reactions was employed. Both samples with natural composition and isotopic enrichment were employed to differentiate reactions leading to the same product. An automated pneumatic system was used for the sample irradiation, transport and radioactivity measurements. The radioactivity of the samples was determined by standard gamma-spectrometry using HPGe detector. The results obtained in the present work are compared with the data from other authors and TENDL-2017 evaluation.
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- 2023
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27. A new measurement on 56Fe(n,inl) using GAINS@GELINA
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Negret Alexandru, Borcea Catalin, Boromiza Marian, Claeys François, Dessagne Philippe, Fontana Cristiano, Henning Greg, Kalantar-Nayestanaki Nasser, Kavatsyuk Myroslav, Kerveno Maelle, Nyman Markus, Olacel Adina, Oprea Andreea, Paradela Carlos, and Plompen Arjan
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Physics ,QC1-999 - Abstract
The extended dataset of 56Fe(n,n’γ) cross sections measured by our group more than a decade ago at GELINA (Geel Linear Accelerator) was used in many recent evaluations like ENDF, JEFF and CIELO. Despite the special measures we took to ensure reliability and accuracy, concerns were raised by various groups with regard to several features of this dataset (absolute normalization and/or shape) and therefore the 56Fe(n,inl) cross section is still under the evaluation by the International Nuclear Data Evaluation Network (INDEN). Consequently, a new experiment is now under preparation aiming to take advantage of the numerous experimental improvements of the GAINS (Gamma Array for Inelastic Neutron Scattering) setup implemented over the years. While γ spectroscopy combined with the time-of-flight method will remain the main technique involved, several other experimental details will differ substantially.
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- 2023
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28. GRAPhEME: Performances, achievements (@EC-JRC/GELINA) and future (@GANIL/SPIRAL2/NFS)
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Kerveno Maëlle, Borcea Catalin, Boromiza Marian, Capote Roberto, Claeys François, Dari Bako Nicolas, De Saint Jean Cyrille, Dessagne Philippe, Drohé Jean Claude, Dupuis Marc, Henning Greg, Hilaire Stéphane, Kawano Toshihiko, Negret Alexandru, Nyman Markus, Olacel Adina, Paradela Carlos, Plompen Arjan, and Wynants Ruud
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Physics ,QC1-999 - Abstract
GRAPhEME is a γ-spectrometer developed by CNRS/IPHC Strasbourg (France), in collaboration with EC-JRC Geel (Belgium) and IFIN-HH Bucharest (Romania). With its 6 High Purity Planar Germanium detectors and one fission chamber, GRAPhEME, installed at the EC-JRC GELINA facility, was optimized for measurements of accurate (n, xnγ) cross sections on actinides. The experimental methodology is based on the prompt γ-ray spectroscopy coupled to time-of-flight measurements. In this paper, we present an overview of fifteen years of experiments with GRAPhEME at EC-JRC GELINA facility, illustrated by main achievements to highlight the performances reached by our spectrometer. Beyond the experimental work, a close collaboration with theoreticians has emerged allowing the use of the data produced with GRAPhEME to test and constraint nuclear reaction codes like TALYS, CoH and EMPIRE. In a near future, GRAPhEME will be available to start measurement campaigns at the new neutron beam facility SPIRAL2/NFS. There, studies of (n, 2n) and (n, 3n) reactions will be possible and will complete the work done at EC-JRC GELINA on (n, n ) reactions. Despite the amount of cross section data provided by GRAPhEME up to now, the prompt γ-ray spectroscopy method presents some weaknesses that our collaboration tries to overcome. This goes through new calculation schemes based on theoretical modeling constrained on experimental data to infer the total (n, xn) cross section, new instrument to measure conversion electrons but also by being proactive in dissemination activities to make the nuclear structure community aware of our needs about new accurate nuclear structure information on actinides.
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- 2023
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29. TOF Facility at CERN
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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
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- 2019
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30. The response of single crystal diamond detectors to 17–34 MeV neutrons
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Majerle, M., Angelone, M., Krása, A., Novák, J., Pillon, M., Pilotti, R., Plompen, A., Šimečková, E., and Štefánik, M.
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- 2020
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31. Measurement of the $^{12}$C($n,p$)$^{12}$B cross section at n_TOF (CERN) by in-beam activation analysis
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Žugec, P., Colonna, N., Bosnar, D., Mengoni, A., Altstadt, S., Andrzejewski, J., Audouin, L., Barbagallo, M., Bécares, V., Bečvář, F., Belloni, F., Berthoumieux, E., Billowes, J., Boccone, V., Brugger, M., Calviani, M., Cano-Ott, F. Calviño D., Carrapiço, C., Cerutti, F., Chiaveri, E., Chin, M., Cortés, G., Cortés-Giraldo, M. A., Cosentino, L., Diakaki, M., Domingo-Pardo, C., Dressler, R., Duran, I., Eleftheriadis, C., Ferrari, A., Finocchiaro, P., Fraval, K., Ganesan, S., García, A. R., Giubrone, G., Gómez-Hornillos, M. B., Gonçalves, I. F., González-Romero, E., Griesmayer, E., Guerrero, C., Gunsing, F., Gurusamy, P., Heinitz, S., Jenkins, D. G., Jericha, E., Käppeler, F., Karadimos, D., Kivel, N., Kokkoris, M., Krtička, M., Kroll, J., Langer, C., Lederer, C., Leeb, H., Leong, L. S., LoMeo, S., Losito, R., Manousos, A., Marganiec, J., Martínez, T., Massimi, C., Mastinu, P., Mastromarco, M., Mendoza, E., Milazzo, P. M., Mingrone, F., Mirea, M., Mondalaers, W., Musumarra, A., Paradela, C., Pavlik, A., Perkowski, J., Plompen, A., Praena, J., Quesada, J., Rauscher, T., Reifarth, R., Riego, A., Roman, F., Rubbia, C., Sarmento, R., Saxena, A., Schillebeeckx, P., Schmidt, S., Schumann, D., Tagliente, G., Tain, J. L., Tarrío, D., Tassan-Got, L., Tsinganis, A., Valenta, S., Vannini, G., Variale, V., Vaz, P., Ventura, A., Versaci, R., Vermeulen, M. J., Vlachoudis, V., Vlastou, R., Wallner, A., Ware, T., Weigand, M., Weiß, C., and Wright, T.
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Nuclear Experiment - Abstract
The integral cross section of the $^{12}$C($n,p$)$^{12}$B reaction has been determined for the first time in the neutron energy range from threshold to several GeV at the n_TOF facility at CERN. The measurement relies on the activation technique, with the $\beta$-decay of $^{12}$B measured over a period of four half-lives within the same neutron bunch in which the reaction occurs. The results indicate that model predictions, used in a variety of applications, are mostly inadequate. The value of the integral cross section reported here can be used as a benchmark for verifying or tuning model calculations., Comment: 6 pages, 4 figures
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- 2014
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32. GEANT4 simulation of the neutron background of the C$_6$D$_6$ set-up for capture studies at n_TOF
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collaboration, n_TOF, Žugec, P., Colonna, N., Bosnar, D., Altstadt, S., Andrzejewski, J., Audouin, L., Barbagallo, M., Bécares, V., Bečvář, F., Belloni, F., Berthoumieux, E., Billowes, J., Boccone, V., Brugger, M., Calviani, M., Calviño, F., Cano-Ott, D., Carrapiço, C., Cerutti, F., Chiaveri, E., Chin, M., Cortés, G., Cortés-Giraldo, M. A., Diakaki, M., Domingo-Pardo, C., Dressler, R., Duran, I., Dzysiuk, N., Eleftheriadis, C., Ferrari, A., Fraval, K., Ganesan, S., García, A. R., Giubrone, G., Gómez-Hornillos, M. B., Gonçalves, I. F., González-Romero, E., Griesmayer, E., Guerrero, C., Gunsing, F., Gurusamy, P., Heinitz, S., Jenkins, D. G., Jericha, E., Kadi, Y., Käppeler, F., Karadimos, D., Kivel, N., Koehler, P., Kokkoris, M., Krtička, M., Kroll, J., Langer, C., Lederer, C., Leeb, H., Leong, L. S., Meo, S. Lo, Losito, R., Manousos, A., Marganiec, J., Martìnez, T., Massimi, C., Mastinu, P. F., Mastromarco, M., Meaze, M., Mendoza, E., Mengoni, A., Milazzo, P. M., Mingrone, F., Mirea, M., Mondalaers, W., Paradela, C., Pavlik, A., Perkowski, J., Plompen, A., Praena, J., Quesada, J. M., Rauscher, T., Reifarth, R., Riego, A., Roman, F., Rubbia, C., Sarmento, R., Saxena, A., Schillebeeckx, P., Schmidt, S., Schumann, D., Tagliente, G., Tain, J. L., Tarrío, D., Tassan-Got, L., Tsinganis, A., Valenta, S., Vannini, G., Variale, V., Vaz, P., Ventura, A., Versaci, R., Vermeulen, M. J., Vlachoudis, V., Vlastou, R., Wallner, A., Ware, T., Weigand, M., Weiß, C., and Wright, T.
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Physics - Instrumentation and Detectors ,Nuclear Experiment - Abstract
The neutron sensitivity of the C$_6$D$_6$ detector setup used at n_TOF for capture measurements has been studied by means of detailed GEANT4 simulations. A realistic software replica of the entire n_TOF experimental hall, including the neutron beam line, sample, detector supports and the walls of the experimental area has been implemented in the simulations. The simulations have been analyzed in the same manner as experimental data, in particular by applying the Pulse Height Weighting Technique. The simulations have been validated against a measurement of the neutron background performed with a $^\mathrm{nat}$C sample, showing an excellent agreement above 1 keV. At lower energies, an additional component in the measured $^\mathrm{nat}$C yield has been discovered, which prevents the use of $^\mathrm{nat}$C data for neutron background estimates at neutron energies below a few hundred eV. The origin and time structure of the neutron background have been derived from the simulations. Examples of the neutron background for two different samples are demonstrating the important role of accurate simulations of the neutron background in capture cross section measurements.
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- 2014
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33. $^{62}$Ni($n,\gamma$) and $^{63}$Ni($n,\gamma$) cross sections measured at n_TOF/CERN
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Lederer, C., Massimi, C., Berthoumieux, E., Colonna, N., Dressler, R., Guerrero, C., Gunsing, F., Käppeler, F., Kivel, N., Pignatari, M., Reifarth, R., Schumann, D., Wallner, A., Altstadt, S., Andriamonje, S., Andrzejewski, J., Audouin, L., Barbagallo, M., Becares, V., Becvar, F., Belloni, F., Berthier, B., Billowes, J., Boccone, V., Bosnar, D., Brugger, M., Calviani, M., Calvino, F., Cano-Ott, D., Carrapico, C., Cerutti, F., Chiaveri, E., Chin, M., Cortes, G., Cortes-Giraldo, M. A., Dillmann, I., Domingo-Pardo, C., Duran, I., Dzysiuk, N., Eleftheriadis, C., Fernandez-Ordonez, M., Ferrari, A., Fraval, K., Ganesan, S., Garcıa, A. R., Giubrone, G., Gomez-Hornillos, M. B., Goncalves, I. F., Gonzalez-Romero, E., Gramegna, F., Griesmayer, E., Gurusamy, P., Harrisopulos, S., Heil, M., Ioannides, K., Jenkins, D. G., Jericha, E., Kadi, Y., Karadimos, D., Korschinek, G., Krticka, M., Kroll, J., Langer, C., Lebbos, E., Leeb, H., Leong, L. S., Losito, R., Lozano, M., Manousos, A., Marganiec, J., Marrone, S., Martinez, T., Mastinu, P. F., Mastromarco, M., Meaze, M., Mendoza, E., Mengoni, A., Milazzo, P. M., Mingrone, F., Mirea, M., Mondalaers, W., Paradela, C., Pavlik, A., Perkowski, J., Plag, R., Plompen, A., Praena, J., Quesada, J. M., Rauscher, T., Riego, A., Roman, F., Rubbia, C., Sarmento, R., Schillebeeckx, P., Schmidt, S., Tagliente, G., Tain, J. L., Tarrıo, D., Tassan-Got, L., Tsinganis, A., Tlustos, L., Valenta, S., Vannini, G., Variale, V., Vaz, P., Ventura, A., Vermeulen, M. J., Versaci, R., Vlachoudis, V., Vlastou, R., Ware, T., Weigand, M., Weiß, C., Wright, T. J., and Zugec, P.
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Nuclear Experiment - Abstract
The cross section of the $^{62}$Ni($n,\gamma$) reaction was measured with the time-of-flight technique at the neutron time-of-flight facility n_TOF at CERN. Capture kernels of 42 resonances were analyzed up to 200~keV neutron energy and Maxwellian averaged cross sections (MACS) from $kT=5-100$ keV were calculated. With a total uncertainty of 4.5%, the stellar cross section is in excellent agreement with the the KADoNiS compilation at $kT=30$ keV, while being systematically lower up to a factor of 1.6 at higher stellar temperatures. The cross section of the $^{63}$Ni($n,\gamma$) reaction was measured for the first time at n_TOF. We determined unresolved cross sections from 10 to 270 keV with a systematic uncertainty of 17%. These results provide fundamental constraints on $s$-process production of heavier species, especially the production of Cu in massive stars, which serve as the dominant source of Cu in the solar system.
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- 2014
- Full Text
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34. Experimental neutron capture data of $^{58}$Ni from the CERN n_TOF facility
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collaboration, n_TOF, Žugec, P., Barbagallo, M., Colonna, N., Bosnar, D., Altstadt, S., Andrzejewski, J., Audouin, L., Bécares, V., Bečvář, F., Belloni, F., Berthoumieux, E., Billowes, J., Boccone, V., Brugger, M., Calviani, M., Calviño, F., Cano-Ott, D., Carrapiço, C., Cerutti, F., Chiaveri, E., Chin, M., Cortés, G., Cortés-Giraldo, M. A., Diakaki, M., Domingo-Pardo, C., Duran, I., Dzysiuk, N., Eleftheriadis, C., Ferrari, A., Fraval, K., Ganesan, S., García, A. R., Giubrone, G., Gómez-Hornillos, M. B., Gonçalves, I. F., González-Romero, E., Griesmayer, E., Guerrero, C., Gunsing, F., Gurusamy, P., Jenkins, D. G., Jericha, E., Kadi, Y., Käppeler, F., Karadimos, D., Koehler, P., Kokkoris, M., Krtička, M., Kroll, J., Langer, C., Lederer, C., Leeb, H., Leong, L. S., Losito, R., Manousos, A., Marganiec, J., Martìnez, T., Massimi, C., Mastinu, P. F., Mastromarco, M., Meaze, M., Mendoza, E., Mengoni, A., Milazzo, P. M., Mingrone, F., Mirea, M., Mondalaers, W., Paradela, C., Pavlik, A., Perkowski, J., Pignatari, M., Plompen, A., Praena, J., Quesada, J. M., Rauscher, T., Reifarth, R., Riego, A., Roman, F., Rubbia, C., Sarmento, R., Schillebeeckx, P., Schmidt, S., Tagliente, G., Tain, J. L., Tarrío, D., Tassan-Got, L., Tsinganis, A., Valenta, S., Vannini, G., Variale, V., Vaz, P., Ventura, A., Versaci, R., Vermeulen, M. J., Vlachoudis, V., Vlastou, R., Wallner, A., Ware, T., Weigand, M., Weiß, C., and Wright, T.
- Subjects
Nuclear Experiment - Abstract
The $^{58}$Ni $(n,\gamma)$ cross section has been measured at the neutron time of flight facility n_TOF at CERN, in the energy range from 27 meV up to 400 keV. In total, 51 resonances have been analyzed up to 122 keV. Maxwellian averaged cross sections (MACS) have been calculated for stellar temperatures of kT$=$5-100 keV with uncertainties of less than 6%, showing fair agreement with recent experimental and evaluated data up to kT = 50 keV. The MACS extracted in the present work at 30 keV is 34.2$\pm$0.6$_\mathrm{stat}\pm$1.8$_\mathrm{sys}$ mb, in agreement with latest results and evaluations, but 12% lower relative to the recent KADoNIS compilation of astrophysical cross sections. When included in models of the s-process nucleosynthesis in massive stars, this change results in a 60% increase of the abundance of $^{58}$Ni, with a negligible propagation on heavier isotopes. The reason is that, using both the old or the new MACS, 58Ni is efficiently depleted by neutron captures., Comment: 10 pages, 8 figures, 5 tables
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- 2014
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35. Neutron capture cross section of unstable 63Ni: implications for stellar nucleosynthesis
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Lederer, C., Massimi, C., Altstadt, S., Andrzejewski, J., Audouin, L., Barbagallo, M., Bécares, V., Bevá, F., Belloni, F., Berthoumieux, E., Billowes, J., Boccone, V., Bosnar, D., Brugger, M., Calviani, M., Calviño, F., Cano-Ott, D., Carrapiço, C., Cerutti, F., Chiaveri, E., Chin, M., Colonna, N., Cortés, G., Cortés-Giraldo, M. A., Diakaki, M., Domingo-Pardo, C., Duran, I., Dressler, R., Dzysiuk, N., Eleftheriadis, C., Ferrari, A., Fraval, K., Ganesan, S., García, A. R., Giubrone, G., Gómez-Hornillos, M. B., Gonçalves, I. F., González-Romero, E., Griesmayer, E., Guerrero, C., Gunsing, F., Gurusamy, P., Jenkins, D. G., Jericha, E., Kadi, Y., Käppeler, F., Karadimos, D., Kivel, N., Koehler, P., Kokkoris, M., Korschinek, G., Krtika, M., Kroll, J., Langer, C., Leeb, H., Leong, L. S., Losito, R., Manousos, A., Marganiec, J., Martínez, T., Mastinu, P. F., Mastromarco, M., Meaze, M., Mendoza, E., Mengoni, A., Milazzo, P. M., Mingrone, F., Mirea, M., Mondelaers, W., Paradela, C., Pavlik, A., Perkowski, J., Pignatari, M., Plompen, A., Praena, J., Quesada, J. M., Rauscher, T., Reifarth, R., Riego, A., Roman, F., Rubbia, C., Sarmento, R., Schillebeeckx, P., Schmidt, S., Schumann, D., Tagliente, G., Tain, J. L., Tarrío, D., Tassan-Got, L., Tsinganis, A., Valenta, S., Vannini, G., Variale, V., Vaz, P., Ventura, A., Versaci, R., Vermeulen, M. J., Vlachoudis, V., Vlastou, R., Wallner, A., Ware, T., Weigand, M., Weiß, C., Wright, T. J., and Zugec, P.
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Nuclear Experiment ,Astrophysics - Solar and Stellar Astrophysics - Abstract
The $^{63}$Ni($n, \gamma$) cross section has been measured for the first time at the neutron time-of-flight facility n\_TOF at CERN from thermal neutron energies up to 200 keV. In total, capture kernels of 12 (new) resonances were determined. Maxwellian Averaged Cross Sections were calculated for thermal energies from kT = 5 keV to 100 keV with uncertainties around 20%. Stellar model calculations for a 25 M$_\odot$ star show that the new data have a significant effect on the $s$-process production of $^{63}$Cu, $^{64}$Ni, and $^{64}$Zn in massive stars, allowing stronger constraints on the Cu yields from explosive nucleosynthesis in the subsequent supernova.
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- 2013
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36. What is needed in culturally competent healthcare systems? A qualitative exploration of culturally diverse patients and professional interpreters in an Australian healthcare setting
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Jennifer White, Trish Plompen, Leanne Tao, Emily Micallef, and Terrence Haines
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Access to care ,Culture competence ,Inpatient medicine ,Interpreters ,Qualitative ,Public aspects of medicine ,RA1-1270 - Abstract
Abstract Background Culturally competent health care service delivery can improve health outcomes, increasing the efficiency of clinical staff, and greater patient satisfaction. We aimed to explore the experience of patients with limited English proficiency and professional interpreters in an acute hospital setting. Methods In-depth interviews explored the experiences of four culturally and linguistically diverse communities with regards to their recent hospitalisation and access to interpreters. We also conducted focus group with professional interpreters working. Data were analysed using an inductive thematic approach with constant comparison. Results Individual interviews were conducted with 12 patients from Greek, Chinese, Dari and Vietnamese backgrounds. Focus groups were conducted with 11 professional interpreters. Key themes emerged highlighting challenges to the delivery of health care due distress and lack of advocacy in patients. Interpreters struggled due to a reliance on family to act as interpreters and hospital staff proficiency in working with them. Conclusions In an era of growing ethnic diversity this study confirms the complexity of providing a therapeutic relationships in contemporary health practice. This can be enhanced by training towards the effective use of professional interpreters in a hospital setting. Such efforts should be multidisciplinary and collective in order to ensure patients don’t fall through the gaps with regards to the provision of culturally competent care.
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- 2019
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37. Fast-neutron induced pre-equilibrium reactions on 55Mn and 63,65Cu at energies up to 40 MeV
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Avrigeanu, M., Chuvaev, S. V., Filatenkov, A. A., Forrest, R. A., Herman, M., Koning, A. J., Plompen, A. J. M., Roman, F. L., and Avrigeanu, V.
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Nuclear Experiment - Abstract
Excitation functions were measured for the $^{55}$Mn(n,2n)$^{54}$Mn, $^{55}$Mn(n,$\alpha$)$^{52}$V, $^{63}$Cu(n,$\alpha$)$^{60}$Co, $^{65}$Cu(n,2n)$^{64}$Cu, and $^{65}$Cu(n,p)$^{65}$Ni reactions from 13.47 to 14.83 MeV. The experimental cross sections are compared with the results of calculations including all activation channels for the stable isotopes of Mn and Cu, for neutron incident energies up to 50 MeV. Within the energy range up to 20 MeV the model calculations are most sensitive to the parameters related to nuclei in the early stages of the reaction, while the model assumptions are better established by analysis of the data in the energy range 20-40 MeV. While the present analysis has taken advantage of both a new set of accurate measured cross sections around 14 MeV and the larger data basis fortunately available between 20 and 40 MeV for the Mn and Cu isotopes, the need of additional measurements below as well as above 40 MeV is pointed out. Keywords: 55Mn, 63,65Cu, E$\leq$40 MeV, Neutron activation cross section measurements, Nuclear reactions, Model calculations, Manganese, Copper, Comment: 39 pages, 12 figures
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- 2007
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38. ENDF/B-VIII.0: The 8th Major Release of the Nuclear Reaction Data Library with CIELO-project Cross Sections, New Standards and Thermal Scattering Data
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Brown, D.A., Chadwick, M.B., Capote, R., Kahler, A.C., Trkov, A., Herman, M.W., Sonzogni, A.A., Danon, Y., Carlson, A.D., Dunn, M., Smith, D.L., Hale, G.M., Arbanas, G., Arcilla, R., Bates, C.R., Beck, B., Becker, B., Brown, F., Casperson, R.J., Conlin, J., Cullen, D.E., Descalle, M.-A., Firestone, R., Gaines, T., Guber, K.H., Hawari, A.I., Holmes, J., Johnson, T.D., Kawano, T., Kiedrowski, B.C., Koning, A.J., Kopecky, S., Leal, L., Lestone, J.P., Lubitz, C., Márquez Damián, J.I., Mattoon, C.M., McCutchan, E.A., Mughabghab, S., Navratil, P., Neudecker, D., Nobre, G.P.A., Noguere, G., Paris, M., Pigni, M.T., Plompen, A.J., Pritychenko, B., Pronyaev, V.G., Roubtsov, D., Rochman, D., Romano, P., Schillebeeckx, P., Simakov, S., Sin, M., Sirakov, I., Sleaford, B., Sobes, V., Soukhovitskii, E.S., Stetcu, I., Talou, P., Thompson, I., van der Marck, S., Welser-Sherrill, L., Wiarda, D., White, M., Wormald, J.L., Wright, R.Q., Zerkle, M., Žerovnik, G., and Zhu, Y.
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- 2018
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39. Evaluation of Neutron Reactions on Iron Isotopes for CIELO and ENDF/B-VIII.0
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Herman, M., Trkov, A., Capote, R., Nobre, G.P.A., Brown, D.A., Arcilla, R., Danon, Y., Plompen, A., Mughabghab, S.F., Jing, Q., Zhigang, G., Tingjin, L., Hanlin, L., Xichao, R., Leal, L., Carlson, B.V., Kawano, T., Sin, M., Simakov, S.P., and Guber, K.
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- 2018
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40. CIELO Collaboration Summary Results: International Evaluations of Neutron Reactions on Uranium, Plutonium, Iron, Oxygen and Hydrogen
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Chadwick, M.B., Capote, R., Trkov, A., Herman, M.W., Brown, D.A., Hale, G.M., Kahler, A.C., Talou, P., Plompen, A.J., Schillebeeckx, P., Pigni, M.T., Leal, L., Danon, Y., Carlson, A.D., Romain, P., Morillon, B., Bauge, E., Hambsch, F.-J., Kopecky, S., Giorginis, G., Kawano, T., Lestone, J., Neudecker, D., Rising, M., Paris, M., Nobre, G.P.A., Arcilla, R., Cabellos, O., Hill, I., Dupont, E., Koning, A.J., Cano-Ott, D., Mendoza, E., Balibrea, J., Paradela, C., Durán, I., Qian, J., Ge, Z., Liu, T., Hanlin, L., Ruan, X., Haicheng, W., Sin, M., Noguere, G., Bernard, D., Jacqmin, R., Bouland, O., De Saint Jean, C., Pronyaev, V.G., Ignatyuk, A.V., Yokoyama, K., Ishikawa, M., Fukahori, T., Iwamoto, N., Iwamoto, O., Kunieda, S., Lubitz, C.R., Salvatores, M., Palmiotti, G., Kodeli, I., Kiedrowski, B., Roubtsov, D., Thompson, I., Quaglioni, S., Kim, H.I., Lee, Y.O., Fischer, U., Simakov, S., Dunn, M., Guber, K., Márquez Damián, J.I., Cantargi, F., Sirakov, I., Otuka, N., Daskalakis, A., McDermott, B.J., and van der Marck, S.C.
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- 2018
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41. ARIEL & SANDA nuclear data activities
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Franzen Carola, Junghans Arnd R., Gonzalez Enrique M., and Plompen Arjan J. M.
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Nuclear engineering. Atomic power ,TK9001-9401 - Abstract
Nuclear data are fundamental quantities for developing nuclear energy concepts and research. They are essential for the simulation of nuclear systems, safety and performance calculations, and reactor instrumentation. Nuclear data improvement requires a combination of many different know-hows that are distributed over many institutions along Europe. In the EURATOM call for Nuclear Fission and Radiation Protection NFRP-2018, two nuclear data projects were started in September 2019: the Coordination and Support Action ARIEL (Accelerator and Research reactor Infrastructures for Education and Learning) and the Research and Innovation Action SANDA (Solving Challenges in Nuclear Data for the Safety of European Nuclear facilities). The ARIEL project integrates education and training of young scientists and technicians with access to neutron beam research infrastructures and supports scientific visits to conduct short-term research projects relevant to thesis works. The SANDA project is focuses on research innovation actions, including detector and nuclear target development, important nuclear data measurements, nuclear data evaluation, and validation. A description of these ongoing projects, including the first results, is the subject of this article.
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- 2022
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42. The experience of interpreter access and language discordant clinical encounters in Australian health care: a mixed methods exploration
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Jennifer White, Trish Plompen, Christian Osadnik, Leanne Tao, Emily Micallef, and Terry Haines
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Inpatient medicine ,Access to care ,Language discordance ,Qualitative ,Public aspects of medicine ,RA1-1270 - Abstract
Abstract Background Current evidence highlights that language discordant clinical encounters seriously compromise patient quality of care and health outcomes. We aimed to characterise patterns of interpreter service use in medical inpatient wards use and explore clinician experience of language discordance. Methods Participants included medical students, residents, attending physicians, nursing and allied health professionals working in General Internal Medicine wards across two tertiary referral hospitals servicing a large Australian health care area. This study involved a retrospective electronic medical record audit of interpreter use. Six focus groups were conducted with 32 participants. Data were analysed using an inductive thematic approach with constant comparison. Results Allied health professionals were identified as the largest users of interpreter services, followed by medical doctors. Distinct themes emerged regarding clinician experiences of language discordant encounters including: (1) Negotiating care when unable to get an accurate assessment; (2) Over servicing to fill in the gaps; (3) Using family members instead of professional interpreters: a vexed solution; (4) Disparities in care provision; and (5) Communication drought: broken by a flood. Conclusions Patients with low English proficiency are at risk of being less informed of care processes, and having a very large volume of information given in a shorter period of time when an interpreter is present. There is a need for systematic and transformative change that addresses utilisation of professional interpreters as well as embedded healthcare culture and practices leading to less interaction with patients with limited English proficiency and reliance on family members as informal interpreters.
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- 2018
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43. Nuclear Data for the Thorium Fuel Cycle and the Transmutation of Nuclear Waste
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Gunsing, F., Altstadt, S., Andrzejewski, J., Audouin, L., Barbagallo, M., Bécares, V., Bečvář, F., Belloni, F., Berthoumieux, E., Billowes, J., Boccone, V., Bosnar, D., Brugger, M., Calviani, M., Calviño, F., Cano-Ott, D., Carrapiço, C., Cerutti, F., Chiaveri, E., Chin, M., Colonna, N., Cortés, G., Cortés-Giraldo, M. A., Diakaki, M., Domingo-Pardo, C., Duran, I., Dressler, R., Eleftheriadis, C., Fraval, K., Ferrari, A., Ganesan, S., Garcìa, A. R., Giubrone, G., Gonçalves, I. F., González-Romero, E., Griesmayer, E., Guerrero, C., Hernández-Prieto, A., Jenkins, D. G., Jericha, E., Kadi, Y., Käppeler, F., Karadimos, D., Kivel, N., Koehler, P., Kokkoris, M., Krtička, M., Kroll, J., Lampoudis, C., Langer, C., Leal-Cidoncha, E., Lederer, C., Leeb, H., Leong, L. S., Losito, R., Mallick, A., Manousos, A., Marganiec, J., Martìnez, T., Massimi, C., Mastinu, P. F., Mastromarco, M., Mendoza, E., Mengoni, A., Milazzo, P. M., Mingrone, F., Mirea, M., Mondalaers, W., Paradela, C., Pavlik, A., Perkowski, J., Plompen, A., Praena, J., Quesada, J. M., Rauscher, T., Reifarth, R., Riego, A., Robles, M. S., Rubbia, C., Sabaté-Gilarte, M., Sarmento, R., Saxena, A., Schillebeeckx, P., Schmidt, S., Schumann, D., Tagliente, G., Tain, J. L., Tarrìo, D., Tassan-Got, L., Tsinganis, A., Vannini, G., Variale, V., Vaz, P., Ventura, A., Vermeulen, M. J., Valenta, S., Vlachoudis, V., Vlastou, R., Wallner, A., Ware, T., Weigand, M., Weiß, C., Wright, T., Žugec, P., Revol, Jean-Pierre, editor, Bourquin, Maurice, editor, Kadi, Yacine, editor, Lillestol, Egil, editor, de Mestral, Jean-Christophe, editor, and Samec, Karel, editor
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- 2016
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44. Characterization of a HPGe detector response for activation cross section measurements: regression method versus Monte Carlo method
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Semkova, Valentina, Otuka, Naohiko, and Plompen, Arjan J. M.
- Abstract
ABSTRACTThe full energy peak efficiencies and covariances of a high purity germanium (HPGe) detector studied by the regression method and Monte Carlo method were compared. The impact of the obtained results on the neutron activation cross-sections measured relative to monitor cross-sections was studied. In the regression method, the efficiencies measured for a set of calibration point sources were analysed by the least-squares analysis. In the Monte Carlo method, the efficiencies for the calibration point sources were calculated by MCNP. The covariances of the efficiencies determined by the regression method were calculated analytically. Perturbation analysis was performed to estimate the covariances of the efficiencies calculated by the Monte Carlo method. Positive correlations higher than 0.8 were found in the uncertainties of the MCNP data for point-like sources. In the case of the regression method, the correlation coefficient contains both positive and negative terms. The efficiencies and their covariances for finite sample geometry were also estimated by both methods to take into account sample effects such as geometrical effect, and gamma-ray self-absorption, and found considerable differences in the cross-sections and their uncertainties for reaction products quantified with low energy gammas. The efficiencies and covariances were clearly affected by the properties of the sample.
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- 2024
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45. Neutron spectroscopy of 26Mg states: Constraining the stellar neutron source 22Ne(α,n)25Mg
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C. Massimi, S. Altstadt, J. Andrzejewski, L. Audouin, M. Barbagallo, V. Bécares, F. Bečvář, F. Belloni, E. Berthoumieux, J. Billowes, S. Bisterzo, D. Bosnar, M. Brugger, M. Calviani, F. Calviño, D. Cano-Ott, C. Carrapiço, D.M. Castelluccio, F. Cerutti, E. Chiaveri, L. Cosentino, M. Chin, G. Clai, N. Colonna, G. Cortés, M.A. Cortés-Giraldo, S. Cristallo, M. Diakaki, C. Domingo-Pardo, I. Duran, R. Dressler, C. Eleftheriadis, A. Ferrari, P. Finocchiaro, K. Fraval, S. Ganesan, A.R. García, G. Giubrone, I.F. Gonçalves, E. González-Romero, E. Griesmayer, C. Guerrero, F. Gunsing, A. Hernández-Prieto, D.G. Jenkins, E. Jericha, Y. Kadi, F. Käppeler, D. Karadimos, N. Kivel, P. Koehler, M. Kokkoris, S. Kopecky, M. Krtička, J. Kroll, C. Lampoudis, C. Langer, E. Leal-Cidoncha, C. Lederer, H. Leeb, L.S. Leong, S. Lo Meo, R. Losito, A. Mallick, A. Manousos, J. Marganiec, T. Martínez, P.F. Mastinu, M. Mastromarco, E. Mendoza, A. Mengoni, P.M. Milazzo, F. Mingrone, M. Mirea, W. Mondelaers, A. Musumarra, C. Paradela, A. Pavlik, J. Perkowski, M. Pignatari, L. Piersanti, A. Plompen, J. Praena, J.M. Quesada, T. Rauscher, R. Reifarth, A. Riego, M.S. Robles, C. Rubbia, M. Sabaté-Gilarte, R. Sarmento, A. Saxena, P. Schillebeeckx, S. Schmidt, D. Schumann, G. Tagliente, J.L. Tain, D. Tarrío, L. Tassan-Got, A. Tsinganis, S. Valenta, G. Vannini, I. Van Rijs, V. Variale, P. Vaz, A. Ventura, M.J. Vermeulen, V. Vlachoudis, R. Vlastou, A. Wallner, T. Ware, M. Weigand, C. Weiß, R. Wynants, T. Wright, and P. Žugec
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s Process ,α+22Ne ,Neutron spectroscopy ,Physics ,QC1-999 - Abstract
This work reports on accurate, high-resolution measurements of the 25Mg(n,γ)26Mg and 25Mg(n,tot) cross sections in the neutron energy range from thermal to about 300 keV, leading to a significantly improved 25Mg(n,γ)26Mg parametrization. The relevant resonances for n+25Mg were characterized from a combined R-matrix analysis of the experimental data. This resulted in an unambiguous spin/parity assignment of the corresponding excited states in 26Mg. With this information experimental upper limits of the reaction rates for 22Ne(α,n)25Mg and 22Ne(α,γ)26Mg were established, potentially leading to a significantly higher (α,n)/(α,γ) ratio than previously evaluated. The impact of these results has been studied for stellar models in the mass range 2 to 25 M⊙.
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- 2017
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46. Resonance region evaluation of 16O for criticality safety and reactor applications
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Leal, Luiz, primary, Leclaire, Nicolas, additional, Plompen, Arjan, additional, Urlass, Sebastian, additional, and Junghans, Arnd, additional
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- 2023
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47. Nuclear data activities at GELINA
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Oprea, Andreea, primary, Heyse, Jan, additional, Kopecky, Stefan, additional, Paradela, Carlos, additional, Plompen, Arjan, additional, Schillebeeckx, Peter, additional, and Sirakov, Ivan, additional
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- 2023
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48. From 232Th(n, n’γ) cross sections to level production and total neutron inelastic scattering cross sections
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Dari Bako, Nicolas, primary, Kerveno, Maëlle, additional, Dessagne, Philippe, additional, Borcea, Catalin, additional, Boromiza, Marian, additional, Capote, Roberto, additional, Claeys, François, additional, Dupuis, Marc, additional, Henning, Greg, additional, Negret, Alexandru, additional, Nyman, Markus, additional, Olacel, Adina, additional, Party, Eliot, additional, and Plompen, Arjan, additional
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- 2023
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49. Implementation of the Dutch expertise centre for child abuse: descriptive data from the first 4 years
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Rick Robert van Rijn, Marjo J Affourtit, Wouter A Karst, Mascha Kamphuis, Leonie C de Bock, Elise van de Putte, R A C Bilo, Mirjam Kruijsen-Jaarsma, H.G.T. Nijs, H.C. Terlingen, S. de Vries, L. van der Berg, A.C.M. van Bellegem, M. Bouman, M.H. Loos, A.S. Smeijers, A.H. Teeuw, P.J. Puiman, F.M.C. van Berkestijn, F. Kamberg, S.L. Nijhof, J.M. Ruskamp, I.M.B. Russel-Kampschoer, M. Schouten, K. Sijstermans, and S.A.A. Wolt-Plompen
- Subjects
Medicine - Abstract
ObjectiveCombined paediatric and forensic medical expertise to interpret physical findings is not available in Dutch healthcare facilities. The Dutch Expertise Centre for Child Abuse (DECCA) was founded in the conviction that this combination is essential in assessing potential physical child abuse. DECCA is a collaboration between the three paediatric hospitals and the Netherlands Forensic Institute. DECCA works with Bayes’ theorem and uses likelihood ratios in their conclusions.DesignWe present the implementation process of DECCA and cross-sectional data of the first 4 years.ParticipantsBetween 14 December 2014 and 31 December 2018, a total of 761 advisory requests were referred, all of which were included in this study. An advisee evaluation over the year 2015 was performed using a self-constructed survey to gain insight in the first experiences with DECCA.Results761 cases were included, 381 (50.1%) boys and 361 (47.4%) girls (19 cases (2.5%) sex undisclosed). Median age was 1.5 years (range 1 day to 20 years). Paediatricians (53.1%) and child safeguarding doctors (21.9%) most frequently contacted DECCA. The two most common reasons for referral were presence of injury/skin lesions (n=592) and clinical history inconsistent with findings (n=145). The most common injuries were bruises (264) and non-skull fractures (166). Outcome of DECCA evaluation was almost certainly no or improbable child abuse in 35.7%; child abuse likely or almost certain in 24.3%, and unclear in 12%. The advisee evaluations (response rate 50%) showed that 93% experienced added value and that 100% were (very) satisfied with the advice.ConclusionData show growing interest in the expertise of DECCA through the years. DECCA seems to be a valuable addition to Dutch child protection, since advisee value the service and outcome of DECCA evaluations. In almost half of the cases, DECCA concluded that child abuse could not be substantiated.
- Published
- 2019
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50. Neutron-induced fission cross sections of Th232 and U233 up to 1 GeV using parallel plate avalanche counters at the CERN n_TOF facility
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Tarrío, D, Tassan-Got, L, Duran, I, Leong, L S, Paradela, C, Audouin, L, Leal-Cidoncha, E, Le Naour, C, Caamaño, M, Ventura, A, Altstadt, S, Andrzejewski, J, Barbagallo, M, Bécares, V, Becvár, F, Belloni, F, Berthoumieux, E, Billowes, J, Boccone, V, Bosnar, D, Brugger, M, Calviani, M, Calviño, F, Cano-Ott, D, Carrapiço, C, Cerutti, F, Chiaveri, E, Chin, M, Colonna, N, Cortés, G, Cortés-Giraldo, M A, Diakaki, M, Domingo-Pardo, C, Dzysiuk, N, Eleftheriadis, C, Ferrari, A, Fraval, K, Ganesan, S, García, A R, Giubrone, G, Gómez-Hornillos, M B, Gonçalves, I F, González-Romero, E, Griesmayer, E, Guerrero, C, Gunsing, F, Gurusamy, P, Jenkins, D G, Jericha, E, Kadi, Y, Käppeler, F, Karadimos, D, Koehler, P, Kokkoris, M, Krticka, M, Kroll, J, Langer, C, Lederer, C, Leeb, H, Losito, R, Manousos, A, Marganiec, J, Martínez, T, Massimi, C, Mastinu, P F, Mastromarco, M, Meaze, M, Mendoza, E, Mengoni, A, Milazzo, P M, Mingrone, F, Mirea, M, Mondalaers, W, Pavlik, A, Perkowski, J, Plompen, A, Praena, J, Quesada, J M, Rauscher, T, Reifarth, R, Riego, A, Robles, M S, Roman, F, Rubbia, C, Sarmento, R, Schillebeeckx, P, Schmidt, S, Tagliente, G, Tain, J L, Tsinganis, A, Valenta, S, Vannini, G, Variale, V, Vaz, P, Versaci, R, Vermeulen, M J, Vlachoudis, V, Vlastou, R, Wallner, A, Ware, T, Weigand, M, Weiß, C, Wright, T J, and Žugec, P
- Subjects
Nuclear Physics - Experiment - Abstract
The neutron-induced fission cross sections of Th232 and U233 were measured relative to U235 in a wide neutron energy range up to 1 GeV (and from fission threshold in the case of Th232, and from 0.7 eV in case of U233), using the white-spectrum neutron source at the CERN Neutron Time-of-Flight (n_TOF) facility. Parallel plate avalanche counters (PPACs) were used, installed at the Experimental Area 1 (EAR1), which is located at 185 m from the neutron spallation target. The anisotropic emission of fission fragments were taken into account in the detection efficiency by using, in the case of U233, previous results available in EXFOR, whereas in the case of Th232 these data were obtained from our measurement, using PPACs and targets tilted 45∘ with respect to the neutron beam direction. Finally, the obtained results are compared with past measurements and major evaluated nuclear data libraries. Calculations using the high-energy reaction models INCL++ and ABLA07 were performed and some of their parameters were modified to reproduce the experimental results. At high energies, where no other neutron data exist, our results are compared with experimental data on proton-induced fission. Moreover, the dependence of the fission cross section at 1 GeV with the fissility parameter of the target nucleus is studied by combining those (p,f) data with our (n,f) data on Th232 and U233 and on other isotopes studied earlier at n_TOF using the same experimental setup.
- Published
- 2023
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