Neutron-induced fission: properties of prompt neutron and γ rays as a function of incident energy

Stetcu, Ionel; Talou, Patrick; Kawano, Toshihiko

doi:10.1051/epjconf/201612201012

Neutron-induced fission: properties of prompt neutron and γ rays as a function of incident energy

Journal Article · Tue Jun 21 00:00:00 EDT 2016 · EPJ Web of Conferences (Online)

DOI:https://doi.org/10.1051/epjconf/201612201012· OSTI ID:1459846

Stetcu, Ionel ^[1]; Talou, Patrick ^[1]; ^[1]

Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

We have applied the Hauser-Feshbach statistical theory, in a Monte-Carlo implementation, to the de-excitation of fission fragments, obtaining a reasonable description of the characteristics of neutrons and gamma rays emitted before beta decays toward stability. Originally implemented for the spontaneous fission of ²⁵²Cf and the neutroninduced fission of ²³⁵U and ²³⁹Pu at thermal neutron energy, in this contribution we discuss the extension of the formalism to incident neutron energies up to 20 MeV. For the emission of pre-fission neutrons, at incident energies beyond second-chance fission, we take into account both the pre-equilibrium and statistical pre-fission components. Phenomenological parameterizations of mass, charge and TKE yields are used to obtain the initial conditions for the fission fragments that subsequently decay via neutron and emissions. Finally, we illustrate this approach for ²³⁹Pu(n,f).

View Accepted Manuscript (DOE)

Research Organization:: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: AC52-06NA25396

OSTI ID:: 1459846

Report Number(s):: LA-UR--16-20240

Journal Information:: EPJ Web of Conferences (Online), Journal Name: EPJ Web of Conferences (Online) Vol. 122; ISSN 2100-014X

Publisher:: EDP SciencesCopyright Statement

Country of Publication:: United States

Language:: English

References (16)

ENDF/B-VII.0: Next Generation Evaluated Nuclear Data Library for Nuclear Science and Technology Chadwick, M. B.; Obložinský, P.; Herman, M. Nuclear Data Sheets, Vol. 107, Issue 12 https://doi.org/10.1016/j.nds.2006.11.001	journal	December 2006
Energy Dependence of Plutonium and Uranium Average Fragment Total Kinetic Energies Lestone, J. P.; Strother, T. T. Nuclear Data Sheets, Vol. 118 https://doi.org/10.1016/j.nds.2014.04.038	journal	April 2014
A global pre-equilibrium analysis from 7 to 200 MeV based on the optical model potential Koning, A. J.; Duijvestijn, M. C. Nuclear Physics A, Vol. 744 https://doi.org/10.1016/j.nuclphysa.2004.08.013	journal	November 2004
Total prompt energy release in the neutron-induced fission of 235U, 238U, and 239Pu Madland, D. G. Nuclear Physics A, Vol. 772, Issue 3-4 https://doi.org/10.1016/j.nuclphysa.2006.03.013	journal	June 2006
Monte Carlo Simulation for Particle and γ-Ray Emissions in Statistical Hauser-Feshbach Model Kawano, Toshihiko; Talou, Patrick; Chadwick, Mark B. Journal of Nuclear Science and Technology, Vol. 47, Issue 5 https://doi.org/10.1080/18811248.2010.9711637	journal	May 2010
The Inelastic Scattering of Neutrons Hauser, Walter; Feshbach, Herman Physical Review, Vol. 87, Issue 2 https://doi.org/10.1103/PhysRev.87.366	journal	July 1952
Two-component exciton model: Basic formalism away from shell closures Kalbach, C. Physical Review C, Vol. 33, Issue 3 https://doi.org/10.1103/PhysRevC.33.818	journal	March 1986
Preequilibrium reactions with complex particle channels Kalbach, C. Physical Review C, Vol. 71, Issue 3 https://doi.org/10.1103/PhysRevC.71.034606	journal	March 2005
Fission-fragment mass distributions from strongly damped shape evolution Randrup, J.; Möller, P.; Sierk, A. J. Physical Review C, Vol. 84, Issue 3 https://doi.org/10.1103/PhysRevC.84.034613	journal	September 2011
Event-by-event evaluation of the prompt fission neutron spectrum from 239 Pu ( n , f ) Vogt, R.; Randrup, J.; Brown, D. A. Physical Review C, Vol. 85, Issue 2 https://doi.org/10.1103/PhysRevC.85.024608	journal	February 2012
Monte Carlo Hauser-Feshbach predictions of prompt fission γ rays: Application to n th + 235 U, n th + 239 Pu, and 252 Cf (sf) Becker, B.; Talou, P.; Kawano, T. Physical Review C, Vol. 87, Issue 1 https://doi.org/10.1103/PhysRevC.87.014617	journal	January 2013
Isomer production ratios and the angular momentum distribution of fission fragments Stetcu, I.; Talou, P.; Kawano, T. Physical Review C, Vol. 88, Issue 4 https://doi.org/10.1103/PhysRevC.88.044603	journal	October 2013
Properties of prompt-fission γ rays Stetcu, I.; Talou, P.; Kawano, T. Physical Review C, Vol. 90, Issue 2 https://doi.org/10.1103/PhysRevC.90.024617	journal	August 2014
Brownian Shape Motion on Five-Dimensional Potential-Energy Surfaces:Nuclear Fission-Fragment Mass Distributions Randrup, Jørgen; Möller, Peter Physical Review Letters, Vol. 106, Issue 13 https://doi.org/10.1103/PhysRevLett.106.132503	journal	March 2011
Spider: a new Instrument for Fission Yield Measurements Tovesson, F.; Arnold, C. W.; Bredeweg, T. Proceedings of the Fifth International Conference on ICFN5, Fission and Properties of Neutron-Rich Nuclei https://doi.org/10.1142/9789814525435_0039	conference	November 2013
New Calculation of Prompt Fission Neutron Spectra and Average Prompt Neutron Multiplicities Madland, David G.; Nix, J. Rayford Nuclear Science and Engineering, Vol. 81, Issue 2 https://doi.org/10.13182/NSE82-5	journal	June 1982

Cited By (4)

Angular momentum of fission fragments from microscopic theory Marević, Petar; Schunck, Nicolas; Randrup, Jørgen Physical Review C, Vol. 104, Issue 2 https://doi.org/10.1103/physrevc.104.l021601	journal	August 2021
Fission dynamics of Pu 240 from saddle to scission and beyond Bulgac, Aurel; Jin, Shi; Roche, Kenneth J. Physical Review C, Vol. 100, Issue 3 https://doi.org/10.1103/physrevc.100.034615	journal	September 2019
Prompt neutron multiplicity distributions inferred from γ -ray and fission fragment energy measurements Lovell, A. E.; Stetcu, I.; Talou, P. Physical Review C, Vol. 100, Issue 5 https://doi.org/10.1103/physrevc.100.054610	journal	November 2019
Determining the average prompt-fission-neutron multiplicity for Pu 239 ( n , f ) via a Pu 240 ( α , α ′ f ) surrogate reaction Wang, B. S.; Harke, J. T.; Akindele, O. A. Physical Review C, Vol. 100, Issue 6 https://doi.org/10.1103/physrevc.100.064609	journal	December 2019

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