Fission Fragment Angular Distribution measurements of ²³⁵U and ²³⁸U at CERN n-TOF facility

Autor(en)

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

Abstrakt

Neutron-induced fission cross sections of U-238 and U-235 are used as standards in the fast neutron region up to 200 MeV. A high accuracy of the standards is relevant to experimentally determine other neutron reaction cross sections. Therefore, the detection efficiency should be corrected by using the angular distribution of the fission fragments (FFAD), which are barely known above 20 MeV. In addition, the angular distribution of the fragments produced in the fission of highly excited and deformed nuclei is an important observable to investigate the nuclear fission process.

In order to measure the FFAD of neutron-induced reactions, a fission detection setup based on parallel-plate avalanche counters (PPACs) has been developed and successfully used at the CERN-n_TOF facility. In this work, we present the preliminary results on the analysis of new U-235(n,f) and U-238(n,f) data in the extended energy range up to 200 MeV compared to the existing experimental data.

Organisation(en)

Isotopenphysik

Externe Organisation(en)

Universidade de Santiago de Compostela (USC), European Commission Joint Research Centre, Uppsala University, Institut de Physique Nucléaire d'Orsay (IPN), Johann Wolfgang Goethe-Universität Frankfurt am Main, University of Lodz, Istituto Nazionale di Fisica Nucleare (INFN), Roma, Centro de Investigaciones Energeticas Medioambientales y Tecnológica, Charles University Prague, French Alternative Energies and Atomic Energy Commission (CEA), University of Manchester, European Organization for Nuclear Research (CERN), University of Zagreb, Universitat Politècnica de Catalunya, Universidade de Lisboa, Universidad de Sevilla, Instituto de Física Corpuscular (IFIC), Paul Scherrer Institute, Aristotle University of Thessaloniki, Bhabha Atomic Research Center, Technische Universität Wien, York University, Karlsruher Institut für Technologie, National Technical University of Athens (NTUA), University of Oslo (UiO), Agenzia nazionale per le nuove tecnologie, l’energia e lo sviluppo economico sostenibile, Università di Bologna, Horia Hulubei National Institute for R&D in Physics and Nuclear Engineering, Universität Basel, University of Hertfordshire, Australian National University

Anzahl der Seiten

6

DOI

https://doi.org/10.1051/epjconf/201611110002

Publikationsdatum

2016

Peer-reviewed

Ja

ÖFOS 2012

103014 Kernphysik

ASJC Scopus Sachgebiete

Physics and Astronomy(all)

Link zum Portal

https://ucris.univie.ac.at/portal/de/publications/fission-fragment-angular-distribution-measurements-of-235u-and-238u-at-cern-ntof-facility(0738928b-611b-4403-84fa-fb7cd53bf616).html