Detailed Investigations of Neutron-Neutron Angular Correlations in Slow-Neutron-Induced Fission of 233U, 235U, and 239Pu

被引：4
|
作者：
Guseva, I. S. [1 ]
Gagarski, A. M. [1 ]
Sokolov, V. E. [1 ]
Petrov, G. A. [1 ]
Vorobyev, A. S. [1 ]
Val'sky, G. V. [1 ]
Zavarukhina, T. A. [1 ]
机构：
[1] Petersburg Nucl Phys Inst, Natl Res Ctr Kurchatov Inst, Gatchina 188300, Russia
来源：
PHYSICS OF ATOMIC NUCLEI | 2018年 / 81卷 / 04期
关键词：
PROMPT NEUTRONS; FRAGMENTS; DISTRIBUTIONS; CF-252; ENERGY;
D O I：
10.1134/S1063778818040051
中图分类号：
O57 [原子核物理学、高能物理学];
学科分类号：
070202 ;
摘要：
An experiment devoted to studying neutron-neutron angular correlations in the slow-neutroninduced fission of U-233, U-235 and Pu-239 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.
引用
收藏
页码：447 / 454
页数：8
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