Refinements in the Los Alamos model of the prompt fission neutron spectrum
Abstract
This paper presents a number of refinements to the original Los Alamos model of the prompt fission neutron spectrum and average prompt neutron multiplicity as derived in 1982. The four refinements are due to new measurements of the spectrum and related fission observables many of which were not available in 1982. Here, they are also due to a number of detailed studies and comparisons of the model with previous and present experimental results including not only the differential spectrum, but also integal cross sections measured in the field of the differential spectrum. The four refinements are (a) separate neutron contributions in binary fission, (b) departure from statistical equilibrium at scission, (c) fission-fragment nuclear level-density models, and (d) center-of-mass anisotropy. With these refinements, for the first time, good agreement has been obtained for both differential and integral measurements using the same Los Alamos model spectrum.
- Authors:
- Publication Date:
- Research Org.:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1326113
- Alternate Identifier(s):
- OSTI ID: 1325656
- Report Number(s):
- LA-UR-16-25265
Journal ID: ISSN 0375-9474; S037594741630238X; PII: S037594741630238X
- Grant/Contract Number:
- AC52-06NA25396
- Resource Type:
- Published Article
- Journal Name:
- Nuclear Physics. A
- Additional Journal Information:
- Journal Name: Nuclear Physics. A Journal Volume: 957 Journal Issue: C; Journal ID: ISSN 0375-9474
- Publisher:
- Elsevier
- Country of Publication:
- Netherlands
- Language:
- English
- Subject:
- 73 NUCLEAR PHYSICS AND RADIATION PHYSICS; Atomic and Nuclear Physics
Citation Formats
Madland, D. G., and Kahler, A. C. Refinements in the Los Alamos model of the prompt fission neutron spectrum. Netherlands: N. p., 2017.
Web. doi:10.1016/j.nuclphysa.2016.09.005.
Madland, D. G., & Kahler, A. C. Refinements in the Los Alamos model of the prompt fission neutron spectrum. Netherlands. https://doi.org/10.1016/j.nuclphysa.2016.09.005
Madland, D. G., and Kahler, A. C. Sun .
"Refinements in the Los Alamos model of the prompt fission neutron spectrum". Netherlands. https://doi.org/10.1016/j.nuclphysa.2016.09.005.
@article{osti_1326113,
title = {Refinements in the Los Alamos model of the prompt fission neutron spectrum},
author = {Madland, D. G. and Kahler, A. C.},
abstractNote = {This paper presents a number of refinements to the original Los Alamos model of the prompt fission neutron spectrum and average prompt neutron multiplicity as derived in 1982. The four refinements are due to new measurements of the spectrum and related fission observables many of which were not available in 1982. Here, they are also due to a number of detailed studies and comparisons of the model with previous and present experimental results including not only the differential spectrum, but also integal cross sections measured in the field of the differential spectrum. The four refinements are (a) separate neutron contributions in binary fission, (b) departure from statistical equilibrium at scission, (c) fission-fragment nuclear level-density models, and (d) center-of-mass anisotropy. With these refinements, for the first time, good agreement has been obtained for both differential and integral measurements using the same Los Alamos model spectrum.},
doi = {10.1016/j.nuclphysa.2016.09.005},
journal = {Nuclear Physics. A},
number = C,
volume = 957,
place = {Netherlands},
year = {Sun Jan 01 00:00:00 EST 2017},
month = {Sun Jan 01 00:00:00 EST 2017}
}
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Works referenced in this record:
Fragment velocities, energies, and masses from fast neutron induced fission of
journal, March 1984
- Müller, R.; Naqvi, A. A.; Käppeler, F.
- Physical Review C, Vol. 29, Issue 3
Event-by-event evaluation of the prompt fission neutron spectrum from
journal, February 2012
- Vogt, R.; Randrup, J.; Brown, D. A.
- Physical Review C, Vol. 85, Issue 2
RIPL – Reference Input Parameter Library for Calculation of Nuclear Reactions and Nuclear Data Evaluations
journal, December 2009
- Capote, R.; Herman, M.; Obložinský, P.
- Nuclear Data Sheets, Vol. 110, Issue 12
Fission Neutron Spectra and Nuclear Temperatures
journal, January 1959
- Terrell, James
- Physical Review, Vol. 113, Issue 2
The 235 U( n , f ) Prompt Fission Neutron Spectrum at 100 K Input Neutron Energy
journal, May 2010
- Kornilov, N.; Hambsch, F. -J.; Fabry, I.
- Nuclear Science and Engineering, Vol. 165, Issue 1
Statistics and Nuclear Reactions
journal, August 1937
- Weisskopf, V.
- Physical Review, Vol. 52, Issue 4
The Ame2012 atomic mass evaluation
journal, December 2012
- Wang, M.; Audi, G.; Wapstra, A. H.
- Chinese Physics C, Vol. 36, Issue 12
Nucleon-Nucleus Optical-Model Parameters, , MeV
journal, June 1969
- Becchetti, F. D.; Greenlees, G. W.
- Physical Review, Vol. 182, Issue 4
Prompt Gamma Rays Emitted in the Thermal-Neutron-Induced Fission of
journal, September 1972
- Pleasonton, Frances; Ferguson, Robert L.; Schmitt, H. W.
- Physical Review C, Vol. 6, Issue 3
Local and global nucleon optical models from 1 keV to 200 MeV
journal, January 2003
- Koning, A. J.; Delaroche, J. P.
- Nuclear Physics A, Vol. 713, Issue 3-4
Multimodal analysis of prompt neutron spectra for (sf), (sf), (sf) and (n,f)
journal, February 2000
- Ohsawa, Takaaki; Horiguchi, Tetsuo; Mitsuhashi, Miki
- Nuclear Physics A, Vol. 665, Issue 1-2
Nuclear Constitution and the Interpretation of Fission Phenomena
journal, March 1953
- Hill, David Lawrence; Wheeler, John Archibald
- Physical Review, Vol. 89, Issue 5
New Calculation of Prompt Fission Neutron Spectra and Average Prompt Neutron Multiplicities
journal, June 1982
- Madland, David G.; Nix, J. Rayford
- Nuclear Science and Engineering, Vol. 81, Issue 2
Advanced Monte Carlo modeling of prompt fission neutrons for thermal and fast neutron-induced fission reactions on
journal, June 2011
- Talou, P.; Becker, B.; Kawano, T.
- Physical Review C, Vol. 83, Issue 6
Nuclear fission modes and fragment mass asymmetries in a five-dimensional deformation space
journal, February 2001
- Möller, P.; Madland, D. G.; Sierk, A. J.
- Nature, Vol. 409, Issue 6822
Prompt Neutron Emission from Fragments in Spontaneous Fission of 244, 248Cm and 252Cf
conference, January 2005
- Vorobyev, A. S.
- NUCLEAR FISSION AND FISSION-PRODUCT SPECTROSCOPY: 3rd International Workshop on Nuclear Fission and Fission-Product Spectroscopy, AIP Conference Proceedings
Systematic behaviour of the average parameters required for the Los Alamos model of prompt neutron emission
journal, January 2009
- Tudora, Anabella
- Annals of Nuclear Energy, Vol. 36, Issue 1
Multiplicity and energy of neutrons from 235U(nth,f) fission fragments
journal, March 1998
- Nishio, K.; Nakagome, Y.; Yamamoto, H.
- Nuclear Physics A, Vol. 632, Issue 4