Generalized Energy-Dependent Q Values for Fission

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We extend Madland's parameterization of the energy release in fission to obtain the dependence of the fission Q value for major and minor actinides on the incident neutron energies in the range 0 {le} E{sub n} {le} 20 MeV. Our parameterization is based on the actinide evaluations recommended for the ENDF/B-VII.1 release. This paper describes the calculation of energydependent fission Q values based on the calculation of the prompt energy release in fission by Madland. This calculation was adopted for use in the LLNL ENDL database and then generalized to obtain the prompt fission energy release for all actinides. Here ... continued below

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Vogt, R March 31, 2010.

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We extend Madland's parameterization of the energy release in fission to obtain the dependence of the fission Q value for major and minor actinides on the incident neutron energies in the range 0 {le} E{sub n} {le} 20 MeV. Our parameterization is based on the actinide evaluations recommended for the ENDF/B-VII.1 release. This paper describes the calculation of energydependent fission Q values based on the calculation of the prompt energy release in fission by Madland. This calculation was adopted for use in the LLNL ENDL database and then generalized to obtain the prompt fission energy release for all actinides. Here the calculation is further generalized to the total energy release in fission. There are several stages in a fission event, depending on the time scale. Neutrons and gammas may be emitted at any time during the fission event.While our discussion here is focussed on compound nucleus creation by an incident neutron, similar parameterizations could be obtained for incident gammas or spontaneous fission.

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PDF-file: 6 pages; size: 70.9 Kbytes

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  • Presented at: Nuclear Data 2010, Jeju, South Korea, Apr 26 - Apr 30, 2010

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  • Report No.: LLNL-CONF-426994
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 1009215
  • Archival Resource Key: ark:/67531/metadc836058

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  • March 31, 2010

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  • May 19, 2016, 3:16 p.m.

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  • Nov. 28, 2016, 6:30 p.m.

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Vogt, R. Generalized Energy-Dependent Q Values for Fission, article, March 31, 2010; Livermore, California. (digital.library.unt.edu/ark:/67531/metadc836058/: accessed December 17, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.