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

页码：447 / 454

页数：8