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Fission Reaction Event Yield Algorithm FREYA 2.0.2

Journal Article · · Computer Physics Communications
 [1];  [2];  [3]
  1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  2. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  3. Univ. of California, Davis, CA (United States)
+ Show Author Affiliations
The purpose of this paper is to present the main differences between FREYA versions 1.0 and 2.0.2. FREYA (Fission Reaction Event Yield Algorithm) is a fission event generator which models complete fission events. As such, it automatically includes fluctuations as well as correlations between observables, resulting from conservation of energy and momentum. The main differences between the two versions are: additional fissionable isotopes, angular momentum conservation, Giant Dipole Resonance form factor for the statistical emission of photons, improved treatment of fission photon emission using RIPL database, and dependence on the incident neutron direction. FREYA 2.0.2 has been integrated into the LLNL Fission Library 2.0.2, which has itself been integrated into MCNP6.2, TRIPOLI-4.10, and can be called from Geant4.10.
Research Organization:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
Sponsoring Organization:
USDOE; USDOE National Nuclear Security Administration (NNSA), Office of Defense Nuclear Nonproliferation
Grant/Contract Number:
AC02-05CH11231; AC52-07NA27344
OSTI ID:
1377786
Alternate ID(s):
OSTI ID: 1549982
Report Number(s):
LLNL-JRNL--728890
Journal Information:
Computer Physics Communications, Journal Name: Computer Physics Communications; ISSN 0010-4655
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

References (9)

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Recent developments in Geant4
  • Allison, J.; Amako, K.; Apostolakis, J.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 835 https://doi.org/10.1016/j.nima.2016.06.125
journal November 2016
Event-by-event evaluation of the prompt fission neutron spectrum from 239 Pu ( n , f ) journal February 2012
Event-by-event study of photon observables in spontaneous and thermal fission journal April 2013
Refined treatment of angular momentum in the event-by-event fission model freya journal April 2014
Neutron angular correlations in spontaneous and neutron-induced fission journal December 2014
Measurements of the giant dipole resonance with monoenergetic photons journal July 1975
Initial MCNP6 Release Overview journal December 2012

Cited By (9)

Using excitation-energy dependent fission yields to identify key fissioning nuclei in r -process nucleosynthesis journal April 2019
High resolution measurement of tagged two-neutron energy and angle correlations in Cf 252 (sf) journal July 2019
Fission dynamics of Pu 240 from saddle to scission and beyond journal September 2019
Improved modeling of photon observables with the event-by-event fission model freya journal December 2017
Prompt neutrons in correlation with fission fragments from U 235 ( n , f ) journal October 2018
Sensitivity of neutron observables to the model input in simulations of 252 Cf ( sf ) journal May 2019
Correlated prompt fission data in transport simulations journal January 2018
Correlated Prompt Fission Data in Transport Simulations text January 2017
Using excitation-energy dependent fission yields to identify key fissioning nuclei in r-process nucleosynthesis text January 2018

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46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
97 MATHEMATICS AND COMPUTING