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Title: Detailed Investigations of Neutron–Neutron Angular Correlations in Slow-Neutron-Induced Fission of {sup 233}U, {sup 235}U, and {sup 239}Pu

Abstract

An experiment devoted to studying neutron–neutron angular correlations in the slow-neutroninduced fission of {sup 233}U, {sup 235}U and {sup 239}Pu nuclei was performed. The experimentally determined angular dependence of the number of neutron–neutron coincidences was compared with the results of a Monte Carlo simulation for various values of the neutron-detection threshold in the range between 490 and 2080 keV. It was found that the experimental angular distributions in question can be described well under the assumption that 2% to 5% of all prompt fission neutrons are emitted isotropically in the laboratory frame. Probably, such neutrons can be interpreted as so-called scission neutrons directly associated with the nuclear-rupture instant. Energy distributions of this component were also obtained from the present analysis.

Authors:
; ; ; ; ; ;  [1]
  1. National Research Center Kurchatov Institute, Petersburg Nuclear Physics Institute (Russian Federation)
Publication Date:
OSTI Identifier:
22761716
Resource Type:
Journal Article
Journal Name:
Physics of Atomic Nuclei
Additional Journal Information:
Journal Volume: 81; Journal Issue: 4; Other Information: Copyright (c) 2018 Pleiades Publishing, Ltd.; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1063-7788
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; ANGULAR CORRELATION; ANGULAR DISTRIBUTION; COMPARATIVE EVALUATIONS; COMPUTERIZED SIMULATION; ENERGY SPECTRA; FISSION; FISSION NEUTRONS; KEV RANGE; MONTE CARLO METHOD; NEUTRON DETECTION; NEUTRON-NEUTRON INTERACTIONS; PLUTONIUM 239; RUPTURES; SLOW NEUTRONS; URANIUM 233; URANIUM 235

Citation Formats

Guseva, I. S., E-mail: guseva-is@pnpi.nrcki.ru, Gagarski, A. M., Sokolov, V. E., Petrov, G. A., Vorobyev, A. S., Val’sky, G. V., and Zavarukhina, T. A. Detailed Investigations of Neutron–Neutron Angular Correlations in Slow-Neutron-Induced Fission of {sup 233}U, {sup 235}U, and {sup 239}Pu. United States: N. p., 2018. Web. doi:10.1134/S1063778818040051.
Guseva, I. S., E-mail: guseva-is@pnpi.nrcki.ru, Gagarski, A. M., Sokolov, V. E., Petrov, G. A., Vorobyev, A. S., Val’sky, G. V., & Zavarukhina, T. A. Detailed Investigations of Neutron–Neutron Angular Correlations in Slow-Neutron-Induced Fission of {sup 233}U, {sup 235}U, and {sup 239}Pu. United States. doi:10.1134/S1063778818040051.
Guseva, I. S., E-mail: guseva-is@pnpi.nrcki.ru, Gagarski, A. M., Sokolov, V. E., Petrov, G. A., Vorobyev, A. S., Val’sky, G. V., and Zavarukhina, T. A. Sun . "Detailed Investigations of Neutron–Neutron Angular Correlations in Slow-Neutron-Induced Fission of {sup 233}U, {sup 235}U, and {sup 239}Pu". United States. doi:10.1134/S1063778818040051.
@article{osti_22761716,
title = {Detailed Investigations of Neutron–Neutron Angular Correlations in Slow-Neutron-Induced Fission of {sup 233}U, {sup 235}U, and {sup 239}Pu},
author = {Guseva, I. S., E-mail: guseva-is@pnpi.nrcki.ru and Gagarski, A. M. and Sokolov, V. E. and Petrov, G. A. and Vorobyev, A. S. and Val’sky, G. V. and Zavarukhina, T. A.},
abstractNote = {An experiment devoted to studying neutron–neutron angular correlations in the slow-neutroninduced fission of {sup 233}U, {sup 235}U and {sup 239}Pu nuclei was performed. The experimentally determined angular dependence of the number of neutron–neutron coincidences was compared with the results of a Monte Carlo simulation for various values of the neutron-detection threshold in the range between 490 and 2080 keV. It was found that the experimental angular distributions in question can be described well under the assumption that 2% to 5% of all prompt fission neutrons are emitted isotropically in the laboratory frame. Probably, such neutrons can be interpreted as so-called scission neutrons directly associated with the nuclear-rupture instant. Energy distributions of this component were also obtained from the present analysis.},
doi = {10.1134/S1063778818040051},
journal = {Physics of Atomic Nuclei},
issn = {1063-7788},
number = 4,
volume = 81,
place = {United States},
year = {2018},
month = {7}
}