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Fission Fragment Angular Distribution measurements of 235U and 238U at CERN n_TOF facility

Leal-Cidoncha, E.; Durán, I.; Paradela, C.; Tarrío, D.; Leong, L.S.; Tassan-Got, L.; Audouin, L.; Altstadt, S.; Andrzejewski, J.; Barbagallo, M.; Bécares, V.; Bečvář, F.; Belloni, F.; Berthoumieux, E.; Billowes, J.; Boccone, V.; Bosnar, D.; Brugger, M.; Calviani, M.; Calviño, F.; ... mehr

Abstract:
Neutron-induced fission cross sections of $^{238}$U and $^{235}$U 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 $^{235}$U(n,f) and $^{238}$U(n,f) data in the extended energy range up to 200 MeV compared to the existing experimental data.


Zugehörige Institution(en) am KIT Institut für Kernphysik (IKP)
Publikationstyp Zeitschriftenaufsatz
Jahr 2016
Sprache Englisch
Identifikator DOI: 10.1051/epjconf/201611110002
ISSN: 2100-014X
URN: urn:nbn:de:swb:90-650459
KITopen ID: 1000065045
HGF-Programm 51.03.04; LK 01
Erschienen in The European physical journal / Web of Conferences
Band 111
Seiten 10002
Lizenz CC BY 4.0: Creative Commons Namensnennung 4.0 International
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