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Title: Parameter optimization and uncertainty analysis of F R E Y A  for spontaneous fission

Abstract

In this work we propose an effort to determine an optimal parameter set for the complete event fission model to reproduce spontaneous fission of 252Cf(sf), 244Cm(sf), 238Pu(sf), 240Pu(sf), 242Pu(sf), and 238U(sf). Earlier studies have partially optimized the event-by-event fission model with respect to the available experimental data using brute force computational techniques. We have confirmed and expanded these results using a least-squares minimization based on the simulated annealing approach. We have furthermore developed a more complete statistical picture of this optimization, consisting of a full correlation matrix for the parameters utilized by . The newly improved parameter values themselves, along with this correlation matrix, have led to a more well-developed physical picture of the fission process.

Authors:
; ;
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Univ. of California, Berkeley, CA (United States)
Sponsoring Org.:
USDOE; USDOE NA Office of Nonproliferation and Verification Research and Development (NA-22)
OSTI Identifier:
1513149
Alternate Identifier(s):
OSTI ID: 1513240; OSTI ID: 1547898
Report Number(s):
LLNL-JRNL-757823
Journal ID: ISSN 0168-9002; 945771
Grant/Contract Number:  
AC52-07NA27344; NA0003180; AC02-05CH11231
Resource Type:
Accepted Manuscript
Journal Name:
Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment
Additional Journal Information:
Journal Volume: 922; Journal Issue: C; Journal ID: ISSN 0168-9002
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; Nuclear Fission; Modeling; FREYA

Citation Formats

Van Dyke, J., Bernstein, L. A., and Vogt, R.. Parameter optimization and uncertainty analysis of FREYA  for spontaneous fission. United States: N. p., 2019. Web. https://doi.org/10.1016/j.nima.2019.01.001.
Van Dyke, J., Bernstein, L. A., & Vogt, R.. Parameter optimization and uncertainty analysis of FREYA  for spontaneous fission. United States. https://doi.org/10.1016/j.nima.2019.01.001
Van Dyke, J., Bernstein, L. A., and Vogt, R.. Mon . "Parameter optimization and uncertainty analysis of FREYA  for spontaneous fission". United States. https://doi.org/10.1016/j.nima.2019.01.001. https://www.osti.gov/servlets/purl/1513149.
@article{osti_1513149,
title = {Parameter optimization and uncertainty analysis of FREYA  for spontaneous fission},
author = {Van Dyke, J. and Bernstein, L. A. and Vogt, R.},
abstractNote = {In this work we propose an effort to determine an optimal parameter set for the complete event fission model to reproduce spontaneous fission of 252Cf(sf), 244Cm(sf), 238Pu(sf), 240Pu(sf), 242Pu(sf), and 238U(sf). Earlier studies have partially optimized the event-by-event fission model with respect to the available experimental data using brute force computational techniques. We have confirmed and expanded these results using a least-squares minimization based on the simulated annealing approach. We have furthermore developed a more complete statistical picture of this optimization, consisting of a full correlation matrix for the parameters utilized by . The newly improved parameter values themselves, along with this correlation matrix, have led to a more well-developed physical picture of the fission process.},
doi = {10.1016/j.nima.2019.01.001},
journal = {Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment},
number = C,
volume = 922,
place = {United States},
year = {2019},
month = {4}
}

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Cited by: 1 work
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Works referenced in this record:

Calculation of fission observables through event-by-event simulation
journal, August 2009


Event-by-event study of neutron observables in spontaneous and thermal fission
journal, October 2011


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


Fission Reaction Event Yield Algorithm, FREYA — For event-by-event simulation of fission
journal, June 2015


Fission Reaction Event Yield Algorithm FREYA 2.0.2
journal, January 2018


Refined treatment of angular momentum in the event-by-event fission model freya
journal, April 2014


Neutron-neutron angular correlations in spontaneous fission of Cf 252 and Pu 240
journal, April 2018


Improved modeling of photon observables with the event-by-event fission model freya
journal, December 2017


Optimization by Simulated Annealing
journal, May 1983


Reevaluation of Prompt Neutron Emission Multiplicity Distributions for Spontaneous Fission
journal, October 2008

  • Santi, P.; Miller, M.
  • Nuclear Science and Engineering, Vol. 160, Issue 2
  • DOI: 10.13182/NSE07-85

Facility for neutron multiplicity measurements in fission
journal, January 2004

  • 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
  • DOI: 10.1016/j.nima.2003.09.029

Prompt neutron multiplicity in correlation with fragments from spontaneous fission of Cf 252
journal, December 2014


Simultaneous investigation of fission fragments and neutrons in 252Cf (SF)
journal, December 1988


Evidence for the stochastic aspect of prompt γ emission in spontaneous fission
journal, February 2012


Prompt fission γ -ray spectrum characteristics from Pu 240 ( sf ) and Pu 242 ( sf )
journal, May 2016


Comparison of the spontaneous fission of 244Cm and 252Cf
journal, March 1983


RIPL – Reference Input Parameter Library for Calculation of Nuclear Reactions and Nuclear Data Evaluations
journal, December 2009


Neutron angular correlations in spontaneous and neutron-induced fission
journal, December 2014


    Works referencing / citing this record:

    High resolution measurement of tagged two-neutron energy and angle correlations in Cf 252 (sf)
    journal, July 2019