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Determination of neutron-induced fission fragment spin distribution after neutron evaporation

Abstract : Nuclear fission consists of splitting a nucleus into smaller nuclei. Several observables are available to study the fission process such as fission yields or fission fragment angular momentum. Currently, fission models cannot predict all the observables with an acceptable accuracy for nuclear fuel cycle studies for instance. Improvement of fission models is an important issue for the knowledge of the process itself and for the applications. In this work, we take an interest in fission fragment angular momentum distribution. Isomeric ratios (IRs) are a common observable giving access to investigate these distributions. We measured accurate IRs for 88Br, 132Sn and 132Te with the fission fragment separator LOHENGRIN and developed a new analysis method to assess the mean value and uncertainty of the IR. An evaluation of the angular momentum distribution of 132Sn was also performed with the FIFFRELIN code.
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Conference papers
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http://hal.in2p3.fr/in2p3-01171996
Contributor : Emmanuelle Vernay <>
Submitted on : Monday, July 6, 2015 - 4:16:46 PM
Last modification on : Friday, December 4, 2020 - 3:42:02 PM

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  • HAL Id : in2p3-01171996, version 1

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A. Chebboubi, G. Kessedjian, O. Litaize, Olivier Serot, H. Faust, et al.. Determination of neutron-induced fission fragment spin distribution after neutron evaporation. 14th International Conference on Nuclear Reaction Mechanisms, Jun 2015, Varenna, Italy. ⟨in2p3-01171996⟩

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