在 0.3-500 MeV 中子能量范围内测量 $^{243}$ Am 相对于 $^{235}$ U 的中子诱发裂变截面及其分析

IF 2.8 3区物理与天体物理 Q2 PHYSICS, NUCLEAR

The European Physical Journal A Pub Date : 2024-05-29 DOI:10.1140/epja/s10050-024-01334-2

Alexander S. Vorobyev, Alexei M. Gagarski, Oleg A. Shcherbakov, Larisa A. Vaishnene, Alexey L. Barabanov, Tatiana E. Kuz’mina

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引用次数: 0

摘要

在国家研究理事会 "库尔恰托夫研究所" - PNPI 的中子综合体 GNEIS 的飞行时间光谱仪上，对入射中子能量从 0.3 MeV 到 500 MeV 的 $^{243}$Am 裂变截面进行了测量。使用位置敏感的低压多线计数器对裂变碎片进行了登记，从而可以同时测量裂变碎片的角度分布。对这些分布进行处理后，首次确定了 $^{243}$Am 裂变碎片的角各向异性在广泛的中子能量范围内的能量依赖性。测量了相对于 $^{235}$U(n, f) 截面的 $^{243}$Am(n, f) 截面。获得的数据与其他实验结果进行了比较。提出并讨论了 $^{243}$Am(n, f) 反应的裂变截面和裂变碎片角分布各向异性的理论估计值。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

$Measurement of the neutron-induced fission cross section of $^{243}$Am relative to $^{235}$U in the neutron energy range of 0.3–500 MeV and its analysis$

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Measurement of the neutron-induced fission cross section of $^{243}$Am relative to $^{235}$U in the neutron energy range of 0.3–500 MeV and its analysis

The $^{243}$Am fission cross section was measured for incident neutron energies from 0.3 MeV to 500 MeV on the time-of-flight spectrometer of the neutron complex GNEIS at the NRC “Kurchatov Institute” – PNPI. Fission fragments were registered using position-sensitive low-pressure multiwire counters, which made it possible to simultaneously measure the angular distributions of fission fragments. As a result of processing these distributions, the energy dependence of the angular anisotropy of fission fragments of $^{243}$Am in a wide range of neutron energies was determined for the first time. The cross section of $^{243}$Am(n, f) was measured relative to the $^{235}$U(n, f) cross section. The obtained data are compared with the results of other experimental works. Theoretical estimates for the fission cross section and anisotropy of angular distribution of fission fragments for the $^{243}$Am(n, f) reaction are presented and discussed.

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来源期刊

The European Physical Journal A 物理-物理：核物理

CiteScore

5.00

自引率

18.50%

发文量

216

审稿时长

3-8 weeks

期刊介绍： Hadron Physics Hadron Structure Hadron Spectroscopy Hadronic and Electroweak Interactions of Hadrons Nonperturbative Approaches to QCD Phenomenological Approaches to Hadron Physics Nuclear and Quark Matter Heavy-Ion Collisions Phase Diagram of the Strong Interaction Hard Probes Quark-Gluon Plasma and Hadronic Matter Relativistic Transport and Hydrodynamics Compact Stars Nuclear Physics Nuclear Structure and Reactions Few-Body Systems Radioactive Beams Electroweak Interactions Nuclear Astrophysics Article Categories Letters (Open Access) Regular Articles New Tools and Techniques Reviews.