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희귀 핵 연구단
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Semi-empirical model to determine pre- and post-neutron fission product yields and neutron multiplicity

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Title
Semi-empirical model to determine pre- and post-neutron fission product yields and neutron multiplicity
Author(s)
Lee, Jounghwa; Lee, Young-Ouk; Tae-Sun Park; Schillebeeckx, Peter; Hong, Seung-Woo
Publication Date
2022-05
Journal
Journal of the Korean Physical Society, v.80, no.10, pp.953 - 963
Publisher
Korean Physical Society
Abstract
© 2022, The Korean Physical Society.Post-neutron emission fission product mass distributions are calculated by using pre-neutron emission fission product yields (FPYs) and neutron multiplicity. A semi-empirical model is used to calculate the pre-neutron FPY, first. Then the neutron multiplicity for each fission fragment mass is used to convert the pre-neutron FPY to the post-neutron FPY. In doing so, assumptions are made for the probability for a pre-emission fission fragment with a mass number A∗ to decay to a post-emission fragment with a mass number A. The resulting post-neutron FPYs are compared with the data available. The systems where the experimental data of not only the pre- and post-neutron FPY but also neutron multiplicity are available are the thermal neutron-induced fission of 233U, 235U and 239Pu. Thus, we applied the model calculations to these systems and compared the calculation results with those from the GEF and the data from the ENDF and the EXFOR libraries. Both the pre- and post-neutron fission product mass distributions calculated by using the semi-empirical model and the neutron multiplicity reproduce the overall features of the experimental data.
URI
https://pr.ibs.re.kr/handle/8788114/11945
DOI
10.1007/s40042-022-00490-2
ISSN
0374-4884
Appears in Collections:
Center for Exotic Nuclear Studies(희귀 핵 연구단) > 1. Journal Papers (저널논문)
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