Calculation of 239Pu fission observables in an event-by-event simulation

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The increased interest in more exclusive fission observables has demanded more detailed models. We describe a new computational model, FREYA, that aims to meet this need by producing large samples of complete fission events from which any observable of interest can then be extracted consistently, including any interesting correlations. The various model assumptions are described and the potential utility of the model is illustrated. As a concrete example, we use formal statistical methods, experimental data on neutron production in neutron-induced fission of {sup 239}Pu, along with FREYA, to develop quantitative insights into the relation between reaction observables and detailed microscopic ... continued below

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6 p. (0.2 MB)

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Vogt, R; Randrup, J; Pruet, J & Younes, W March 31, 2010.

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The increased interest in more exclusive fission observables has demanded more detailed models. We describe a new computational model, FREYA, that aims to meet this need by producing large samples of complete fission events from which any observable of interest can then be extracted consistently, including any interesting correlations. The various model assumptions are described and the potential utility of the model is illustrated. As a concrete example, we use formal statistical methods, experimental data on neutron production in neutron-induced fission of {sup 239}Pu, along with FREYA, to develop quantitative insights into the relation between reaction observables and detailed microscopic aspects of fission. Current measurements of the mean number of prompt neutrons emitted in fission taken together with less accurate current measurements for the prompt post-fission neutron energy spectrum, up to the threshold for multi-chance fission, place remarkably fine constraints on microscopic theories.

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6 p. (0.2 MB)

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PDF-file: 6 pages; size: 0.2 Mbytes

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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-426996
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 1009211
  • Archival Resource Key: ark:/67531/metadc833430

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  • March 31, 2010

Added to The UNT Digital Library

  • May 19, 2016, 3:16 p.m.

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  • April 17, 2017, 12:10 p.m.

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Vogt, R; Randrup, J; Pruet, J & Younes, W. Calculation of 239Pu fission observables in an event-by-event simulation, article, March 31, 2010; Livermore, California. (digital.library.unt.edu/ark:/67531/metadc833430/: accessed August 20, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.