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Actinide neutron-induced fission up to 20 MeV

Abstract

Fission and total level densities modelling along with double-humped fission barrier parameters allow to describe available actinide neutron-induced fission cross section data in the incident neutron energy range of {approx} 10 keV - 20 MeV. Saddle asymmetries relevant to shell correction model calculations influence fission barriers, extracted by cross section data analysis. The inner barrier was assumed axially symmetric in case of U, Np and Pu neutron-deficient nuclei. It is shown that observed irregularities in neutron-induced fission cross section data in the energy range of 0.5-3 MeV could be attributed to the interplay of few-quasiparticle excitations in the level density of fissioning and residual nuclei. Estimates of first-chance fission cross section and secondary neutron spectrum model were validated by {sup 238}U fission, (n,2n) and (n,3n) data description up to 20 MeV. (author)
Authors:
Maslov, V M [1] 
  1. Radiation Physics and Chemistry Problems Institute, Minsk-Sosny (Belarus)
Publication Date:
Dec 15, 2001
Product Type:
Conference
Report Number:
INIS-XA-858; LNS-015007
Resource Relation:
Conference: Workshop on nuclear reaction data and nuclear reactors: Physics, design and safety, Trieste (Italy), 13 Mar - 14 Apr 2000; Other Information: 45 refs, 13 figs; Related Information: In: Nuclear reaction data and nuclear reactors, ICTP lecture notes CD seriesv. 5, by Paver, N. [University of Trieste (Italy)]; Herman, M. [International Atomic Energy Agency, Vienna (Austria)]; Gandini, A. [ENEA, Rome (Italy)] (eds.), 862 pages.
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; AXIAL SYMMETRY; CROSS SECTIONS; DATA ANALYSIS; ENERGY-LEVEL DENSITY; EXCITATION; FISSION; FISSION BARRIER; MEV RANGE 10-100; NEPTUNIUM ISOTOPES; NEUTRON BEAMS; NEUTRON REACTIONS; NEUTRON SPECTRA; NEUTRON-DEFICIENT ISOTOPES; PLUTONIUM ISOTOPES; URANIUM 238; URANIUM ISOTOPES
OSTI ID:
20854872
Research Organizations:
Abdus Salam International Centre for Theoretical Physics, Trieste (Italy)
Country of Origin:
IAEA
Language:
English
Other Identifying Numbers:
Other: ISBN 92-95003-08-X; TRN: XA0600682027892
Availability:
Available from INIS in electronic form; Also available on-line: http://www.ictp.it
Submitting Site:
INIS
Size:
page(s) 231-268
Announcement Date:
Apr 18, 2007

Citation Formats

Maslov, V M. Actinide neutron-induced fission up to 20 MeV. IAEA: N. p., 2001. Web.
Maslov, V M. Actinide neutron-induced fission up to 20 MeV. IAEA.
Maslov, V M. 2001. "Actinide neutron-induced fission up to 20 MeV." IAEA.
@misc{etde_20854872,
title = {Actinide neutron-induced fission up to 20 MeV}
author = {Maslov, V M}
abstractNote = {Fission and total level densities modelling along with double-humped fission barrier parameters allow to describe available actinide neutron-induced fission cross section data in the incident neutron energy range of {approx} 10 keV - 20 MeV. Saddle asymmetries relevant to shell correction model calculations influence fission barriers, extracted by cross section data analysis. The inner barrier was assumed axially symmetric in case of U, Np and Pu neutron-deficient nuclei. It is shown that observed irregularities in neutron-induced fission cross section data in the energy range of 0.5-3 MeV could be attributed to the interplay of few-quasiparticle excitations in the level density of fissioning and residual nuclei. Estimates of first-chance fission cross section and secondary neutron spectrum model were validated by {sup 238}U fission, (n,2n) and (n,3n) data description up to 20 MeV. (author)}
place = {IAEA}
year = {2001}
month = {Dec}
}