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Title: Improved modeling of photon observables with the event-by-event fission model FREYA

Journal Article · · Physical Review C
 [1];  [2]
  1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States). Nuclear and Chemical Sciences Division; Univ. of California, Davis, CA (United States). Physics Dept.
  2. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Nuclear Science Division
+ Show Author Affiliations

The event-by-event fission model FREYA has been improved, in particular to address deficiencies in the calculation of photon observables. In this paper, we discuss the improvements that have been made and introduce several new variables, some detector dependent, that affect the photon observables. We show the sensitivity of FREYA to these variables. Finally, we then compare the results to the available photon data from spontaneous and thermal neutron-induced fission.

Research Organization:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA), Office of Defense Nuclear Nonproliferation
Grant/Contract Number:
AC52-07NA27344; AC02-05CH11231
OSTI ID:
1424113
Alternate ID(s):
OSTI ID: 1416446
Report Number(s):
LLNL-JRNL-737157; TRN: US1801908
Journal Information:
Physical Review C, Vol. 96, Issue 6; ISSN 2469-9985
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

References (41)

Late-time emission of prompt fission γ rays journal December 2016
Prompt Neutron Emission Probabilities Following Spontaneous and Thermal Neutron Fission journal September 1985
Monte Carlo Hauser-Feshbach predictions of prompt fission γ rays: Application to n th + 235 U, n th + 239 Pu, and 252 Cf (sf) journal January 2013
Properties of prompt-fission γ rays journal August 2014
RIPL – Reference Input Parameter Library for Calculation of Nuclear Reactions and Nuclear Data Evaluations journal December 2009
Fission Reaction Event Yield Algorithm FREYA 2.0.2 journal January 2018
Gamma de-excitation of fission fragments journal December 1964
Improved values for the characteristics of prompt-fission γ -ray spectra from the reaction 235 U( n th , f ) journal May 2013
Simultaneous investigation of fission fragments and neutrons in 252Cf (SF) journal December 1988
Prompt γ-rays emitted in the thermal-neutron induced fission of 233U and 239Pu journal October 1973
Event-by-event study of photon observables in spontaneous and thermal fission journal April 2013
Event-by-event study of neutron observables in spontaneous and thermal fission journal October 2011
Advanced Monte Carlo modeling of prompt fission neutrons for thermal and fast neutron-induced fission reactions on Pu 239 journal June 2011
Impact of low-energy photons on the characteristics of prompt fission γ -ray spectra journal July 2015
Refined treatment of angular momentum in the event-by-event fission model freya journal April 2014
Evidence for the stochastic aspect of prompt γ emission in spontaneous fission journal February 2012
Prompt neutron multiplicity in correlation with fragments from spontaneous fission of Cf 252 journal December 2014
Event-by-event evaluation of the prompt fission neutron spectrum from 239 Pu ( n , f ) journal February 2012
Gamma de-excitation of fission fragments journal March 1965
Fission modelling with FIFRELIN journal December 2015
Energy dependence of the prompt γ -ray emission from the ( d , p ) -induced fission of U * 234 and Pu * 240 journal July 2017
Total Energy Associated with Prompt γ -Ray Emission in the Spontaneous Fission of Cf 252 journal December 1973
Mass-dependent structure in the fission γ-ray yields from 252Cf journal October 1969
Evaluation of prompt fission gamma rays for use in simulating nuclear safeguard measurements journal February 2001
Measurements of the giant dipole resonance with monoenergetic photons journal July 1975
Monte Carlo approach to sequential γ-ray emission from fission fragments journal January 2006
Prompt Gamma Rays from U 235 ( n , f ) , Pu 239 ( n , f ) , and Spontaneous Fission of Cf 252 journal March 1973
Prompt Gamma Rays Emitted in the Thermal-Neutron-Induced Fission of U 235 journal September 1972
A detector for (n,γ) cross-section measurements at a spallation neutron source
  • Heil, M.; Reifarth, R.; Fowler, M. M.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 459, Issue 1-2 https://doi.org/10.1016/S0168-9002(00)00993-1
journal February 2001
Gamma rays from fission fragments journal November 1995
Fission Reaction Event Yield Algorithm, FREYA — For event-by-event simulation of fission journal June 2015
Neutron angular correlations in spontaneous and neutron-induced fission journal December 2014
General Description of Fission Observables: GEF Model Code journal January 2016
Facility for neutron multiplicity measurements in fission
  • Dushin, V. N.; Hambsch, F. -J.; Jakovlev, V. A.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 516, Issue 2-3 https://doi.org/10.1016/j.nima.2003.09.029
journal January 2004
Gamma-ray multiplicity measurement of the spontaneous fission of 252Cf in a segmented HPGe/BGO detector array
  • Bleuel, D. L.; Bernstein, L. A.; Burke, J. T.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 624, Issue 3 https://doi.org/10.1016/j.nima.2010.09.145
journal December 2010
Gamma-neutron competition in the de-excitation mechanism of the fission fragments of 252Cf journal July 1972
A compact gas-filled avalanche counter for DANCE
  • Wu, C. Y.; Chyzh, A.; Kwan, E.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 694 https://doi.org/10.1016/j.nima.2012.07.056
journal December 2012
New prompt spectral γ -ray data from the reaction 252 Cf(sf) and its implication on present evaluated nuclear data files journal February 2013
Evaluation of prompt fission gamma rays for use in simulating nuclear safeguard measurements journal March 2002
Evaluation of prompt fission gamma rays for use in simulating nuclear safeguard measurements report October 1999
Event-by-event study of neutron observables in spontaneous and thermal fission text January 2011

Cited By (6)

Using excitation-energy dependent fission yields to identify key fissioning nuclei in r -process nucleosynthesis journal April 2019
Review on the progress in nuclear fission—experimental methods and theoretical descriptions journal September 2018
High resolution measurement of tagged two-neutron energy and angle correlations in Cf 252 (sf) journal July 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

Figures / Tables (31)

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