Sensitivity of neutron observables to the model input in simulations of ${}^{252}\mathrm{Cf}\left(\mathrm{sf}\right)$
Abstract
Within the framework of $FREYA$ eventbyevent fission simulations, we study the sensitivity of various neutron observables to the input yield function $Y$ ($A,Z,$TKE) on which the fission event sampling is based. We first perform a statistical analysis of the available fission data in order to determine the distribution of possible yield functions $Y$ ($A,Z$,TKE) and we then construct a sample of 15,000 such yield functions. For each of these, $FREYA$ is used to generate one million fission events, leading to a corresponding ensemble of fission observables, including the neutron multiplicity distribution and its factorial moments, the neutron energy spectrum, and the neutronneutron angular correlation. This procedure allows us to study the sensitivity of those neutron observables to the uncertainty in the experimental data. Particular attention is given to the pronounced anticorrelation between the mean neutron multiplicity $$\bar{v}$$ and the mean total fragment kinetic energy TKE. Because the former observable is very well determined experimentally, it is possible to exploit that inherent anticorrelation to derive a significantly stricter tolerance on TKE. In addition, we study the sensitivity to the various $FREYA$ parameters and we introduce a method for determining a Adependent x parameter, $x$($A$), based on the measured Adependent neutron multiplicity, ($A$).
 Authors:

 Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States). Nuclear Science Div.; ; Univ. of California, Berkeley, CA (United States). Nuclear Engineering Dept.
 Los Alamos National Lab. (LANL), Los Alamos, NM (United States). Nuclear Theory Group and XComputational Physics Div.
 Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States). Physics Div.; ; Univ. of California, Davis, CA (United States). Physics Dept.
 Publication Date:
 Research Org.:
 Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
 Sponsoring Org.:
 USDOE National Nuclear Security Administration (NNSA)
 OSTI Identifier:
 1560105
 Alternate Identifier(s):
 OSTI ID: 1515102
 Report Number(s):
 LLNLJRNL767159
Journal ID: ISSN 24699985; PRVCAN; 957515; TRN: US2000457
 Grant/Contract Number:
 AC5207NA27344; AC0205CH11231; DEAC5206NA25396
 Resource Type:
 Accepted Manuscript
 Journal Name:
 Physical Review C
 Additional Journal Information:
 Journal Volume: 99; Journal Issue: 5; Journal ID: ISSN 24699985
 Publisher:
 American Physical Society (APS)
 Country of Publication:
 United States
 Language:
 English
 Subject:
 73 NUCLEAR PHYSICS AND RADIATION PHYSICS
Citation Formats
Randrup, J., Talou, P., and Vogt, R. Sensitivity of neutron observables to the model input in simulations of 252Cf(sf). United States: N. p., 2019.
Web. doi:10.1103/PhysRevC.99.054619.
Randrup, J., Talou, P., & Vogt, R. Sensitivity of neutron observables to the model input in simulations of 252Cf(sf). United States. doi:https://doi.org/10.1103/PhysRevC.99.054619
Randrup, J., Talou, P., and Vogt, R. Wed .
"Sensitivity of neutron observables to the model input in simulations of 252Cf(sf)". United States. doi:https://doi.org/10.1103/PhysRevC.99.054619. https://www.osti.gov/servlets/purl/1560105.
@article{osti_1560105,
title = {Sensitivity of neutron observables to the model input in simulations of 252Cf(sf)},
author = {Randrup, J. and Talou, P. and Vogt, R.},
abstractNote = {Within the framework of $FREYA$ eventbyevent fission simulations, we study the sensitivity of various neutron observables to the input yield function $Y$ ($A,Z,$TKE) on which the fission event sampling is based. We first perform a statistical analysis of the available fission data in order to determine the distribution of possible yield functions $Y$ ($A,Z$,TKE) and we then construct a sample of 15,000 such yield functions. For each of these, $FREYA$ is used to generate one million fission events, leading to a corresponding ensemble of fission observables, including the neutron multiplicity distribution and its factorial moments, the neutron energy spectrum, and the neutronneutron angular correlation. This procedure allows us to study the sensitivity of those neutron observables to the uncertainty in the experimental data. Particular attention is given to the pronounced anticorrelation between the mean neutron multiplicity $\bar{v}$ and the mean total fragment kinetic energy TKE. Because the former observable is very well determined experimentally, it is possible to exploit that inherent anticorrelation to derive a significantly stricter tolerance on TKE. In addition, we study the sensitivity to the various $FREYA$ parameters and we introduce a method for determining a Adependent x parameter, $x$($A$), based on the measured Adependent neutron multiplicity, ($A$).},
doi = {10.1103/PhysRevC.99.054619},
journal = {Physical Review C},
number = 5,
volume = 99,
place = {United States},
year = {2019},
month = {5}
}
Web of Science
Works referenced in this record:
Evaluation of the Neutron Data Standards
journal, February 2018
 Carlson, A. D.; Pronyaev, V. G.; Capote, R.
 Nuclear Data Sheets, Vol. 148
Investigation of the far asymmetric region in 252Cf(sf)
journal, May 1997
 Hambsch, F. J.; Oberstedt, S.
 Nuclear Physics A, Vol. 617, Issue 3
Neutron Emission in Fission of 252Cf(SF)
journal, August 2011
 Zeynalov, Sh.; Hambsch, F. J.; Obertstedt, S.
 Journal of the Korean Physical Society, Vol. 59, Issue 2(3)
Sensitivity of the ^{ 252 } Cf(sf) neutron observables to the FREYA input yield functions Y ( A , Z , TKE)
journal, January 2017
 Randrup, Jørgen; Talou, Patrick; Vogt, Ramona
 EPJ Web of Conferences, Vol. 146
Nuclearcharge distribution and delayedneutron yields for thermalneutroninduced fission of 235U, 233U, and 239Pu and for spontaneous fission of 252Cf
journal, May 1988
 Wahl, Arthur C.
 Atomic Data and Nuclear Data Tables, Vol. 39, Issue 1
Fission Reaction Event Yield Algorithm FREYA 2.0.2
journal, January 2018
 Verbeke, J. M.; Randrup, J.; Vogt, R.
 Computer Physics Communications, Vol. 222
Quantum theory of mechanical deformations
journal, September 2018
 Stengel, Massimiliano; Vanderbilt, David
 Physical Review B, Vol. 98, Issue 12
Simultaneous investigation of fission fragments and neutrons in 252Cf (SF)
journal, December 1988
 BudtzJørgensen, C.; Knitter, H. H.
 Nuclear Physics A, Vol. 490, Issue 2
Further Studies of the Prompt Neutrons from the Spontaneous Fission of ${\mathrm{Cf}}^{252}$
journal, March 1963
 Bowman, Harry R.; Milton, J. C. D.; Thompson, Stanley G.
 Physical Review, Vol. 129, Issue 5
HauserFeshbach fission fragment deexcitation with calculated macroscopicmicroscopic mass yields
journal, March 2018
 Jaffke, Patrick; Möller, Peter; Talou, Patrick
 Physical Review C, Vol. 97, Issue 3
Advanced Monte Carlo modeling of prompt fission neutrons for thermal and fast neutroninduced fission reactions on ${}^{239}\mathrm{Pu}$
journal, June 2011
 Talou, P.; Becker, B.; Kawano, T.
 Physical Review C, Vol. 83, Issue 6
Identifying Inconsistencies in Fission Product Yield Evaluations with Prompt Neutron Emission
journal, March 2018
 Jaffke, Patrick
 Nuclear Science and Engineering, Vol. 190, Issue 3
Correlated prompt fission data in transport simulations
journal, January 2018
 Talou, P.; Vogt, R.; Randrup, J.
 The European Physical Journal A, Vol. 54, Issue 1
Refined treatment of angular momentum in the eventbyevent fission model freya
journal, April 2014
 Randrup, J.; Vogt, R.
 Physical Review C, Vol. 89, Issue 4
Prompt neutron multiplicity in correlation with fragments from spontaneous fission of ${}^{252}\mathrm{Cf}$
journal, December 2014
 Göök, A.; Hambsch, F. J.; Vidali, M.
 Physical Review C, Vol. 90, Issue 6
Fission modelling with FIFRELIN
journal, December 2015
 Litaize, Olivier; Serot, Olivier; Berge, Léonie
 The European Physical Journal A, Vol. 51, Issue 12
Investigation of phenomenological models for the Monte Carlo simulation of the prompt fission neutron and $\gamma $ emission
journal, November 2010
 Litaize, O.; Serot, O.
 Physical Review C, Vol. 82, Issue 5
The CORSET timeofflight spectrometer for measuring binary products of nuclear reactions
journal, January 2008
 Kozulin, E. M.; Bogachev, A. A.; Itkis, M. G.
 Instruments and Experimental Techniques, Vol. 51, Issue 1
Fine structure in the neutron emission ν(A) from 252Cf spontaneous fission fragments
journal, January 1977
 Walsh, R. L.; Boldeman, J. W.
 Nuclear Physics A, Vol. 276, Issue 2
Fission fragment mass and energy distributions as a function of incident neutron energy measured in a lead slowingdown spectrometer
journal, January 2010
 Romano, C.; Danon, Y.; Block, R.
 Physical Review C, Vol. 81, Issue 1
Detailed Study of Alpha Emission in ${}_{}{}^{252}{}_{}{}^{}\mathrm{Cf}$ Fission
journal, January 1973
 Mehta, G. K.; Poitou, J.; Ribrag, M.
 Physical Review C, Vol. 7, Issue 1
^{235} U(n, f) Independent fission product yield and isomeric ratio calculated with the statistical Hauser–Feshbach theory
journal, April 2018
 Okumura, Shin; Kawano, Toshihiko; Jaffke, Patrick
 Journal of Nuclear Science and Technology, Vol. 55, Issue 9
Fission Reaction Event Yield Algorithm, FREYA — For eventbyevent simulation of fission
journal, June 2015
 Verbeke, J. M.; Randrup, J.; Vogt, R.
 Computer Physics Communications, Vol. 191
General Description of Fission Observables: GEF Model Code
journal, January 2016
 Schmidt, K. H.; Jurado, B.; Amouroux, C.
 Nuclear Data Sheets, Vol. 131
Improved modeling of photon observables with the eventbyevent fission model freya
journal, December 2017
 Vogt, R.; Randrup, J.
 Physical Review C, Vol. 96, Issue 6
Coincident TimeofFlight Measurements of the Velocities of ${\mathrm{Cf}}^{252}$ Fission Fragments
journal, August 1963
 Whetstone, Stanley L.
 Physical Review, Vol. 131, Issue 3
Velocity and Angular Distributions of Prompt Neutrons from Spontaneous Fission of ${\mathrm{Cf}}^{252}$
journal, June 1962
 Bowman, Harry R.; Thompson, Stanley G.; Milton, J. C. D.
 Physical Review, Vol. 126, Issue 6