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

Date

2016

Authors

Leal-Cidoncha, E.
Duran, I
Paradela, C.
Audouin, L
Altstadt, S
Barbagallo, M
Billowes, J.
Boccone, V
Brugger, M
Calviani, M

Journal Title

Journal ISSN

Volume Title

Publisher

EPJ Web of Conferences

Abstract

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

Description

Keywords

Citation

Source

EPJ Web of Conferences

Type

Conference paper

Book Title

Entity type

Access Statement

Open Access

License Rights

Creative Commons Attribution 4.0 International License

DOI

10.1051/epjconf/201611110002

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