Measurement of the Energy Spectrum of Short-Pulse Neutron Sources Based on Photonuclear Reactions

IF 1.3 4区物理与天体物理 Q3 PHYSICS, MULTIDISCIPLINARY

JETP Letters Pub Date : 2025-07-18 DOI:10.1134/S0021364025606578

S. A. Shulyapov, E. M. Starodubtseva, I. N. Tsymbalov, A. Yu. Zavorotny, M. A. Bakulev, A. S. Chepurnov, A. A. Kuznetsov, A. B. Savel’ev

{"title":"Measurement of the Energy Spectrum of Short-Pulse Neutron Sources Based on Photonuclear Reactions","authors":"S. A. Shulyapov, E. M. Starodubtseva, I. N. Tsymbalov, A. Yu. Zavorotny, M. A. Bakulev, A. S. Chepurnov, A. A. Kuznetsov, A. B. Savel’ev","doi":"10.1134/S0021364025606578","DOIUrl":null,"url":null,"abstract":"The energy spectrum of neutrons generated in the Pb(\\(\\gamma ,n\\)) photonuclear reaction has been experimentally studied using a short-pulse laser-plasma electron source (1 TW, 10 Hz). An electron beam accelerated in a nitrogen jet is incident on a lead converter where bremsstrahlung initiating a photodisintegration reaction is generated. The time-of-flight method has been applied for the first time to measure the neutron spectrum in the neutron-counting mode using a scintillation detector based on a stilbene crystal. An exponential distribution with a characteristic “temperature” of ~2 MeV and a maximum energy of ~8 MeV is observed in the measured spectrum. The developed method is very promising for studying photonuclear reaction cross sections near the threshold using compact laser systems or projected \\(\\gamma \\)-ray sources based on inverse Compton scattering.","PeriodicalId":604,"journal":{"name":"JETP Letters","volume":"121 11","pages":"819 - 823"},"PeriodicalIF":1.3000,"publicationDate":"2025-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1134/S0021364025606578.pdf","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"JETP Letters","FirstCategoryId":"101","ListUrlMain":"https://link.springer.com/article/10.1134/S0021364025606578","RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"PHYSICS, MULTIDISCIPLINARY","Score":null,"Total":0}

引用次数: 0

Abstract

The energy spectrum of neutrons generated in the Pb(\(\gamma ,n\)) photonuclear reaction has been experimentally studied using a short-pulse laser-plasma electron source (1 TW, 10 Hz). An electron beam accelerated in a nitrogen jet is incident on a lead converter where bremsstrahlung initiating a photodisintegration reaction is generated. The time-of-flight method has been applied for the first time to measure the neutron spectrum in the neutron-counting mode using a scintillation detector based on a stilbene crystal. An exponential distribution with a characteristic “temperature” of ~2 MeV and a maximum energy of ~8 MeV is observed in the measured spectrum. The developed method is very promising for studying photonuclear reaction cross sections near the threshold using compact laser systems or projected \(\gamma \)-ray sources based on inverse Compton scattering.

查看原文本刊更多论文

基于光核反应的短脉冲中子源能谱测量

利用短脉冲激光等离子体电子源（1 TW, 10 Hz）实验研究了Pb（\(\gamma ,n\)）光核反应中产生的中子能谱。在氮气射流中加速的电子束入射到铅转炉上，产生轫致辐射引发光分解反应。首次将飞行时间法应用于基于二苯乙烯晶体的闪烁探测器中子计数模式下的中子能谱测量。在测量的光谱中观察到一个指数分布，其特征“温度”为2 MeV，最大能量为8 MeV。所开发的方法在使用紧凑激光系统或基于逆康普顿散射的投影\(\gamma \)射线源研究阈值附近的光核反应截面方面非常有前景。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

JETP Letters 物理-物理：综合

CiteScore

2.40

自引率

30.80%

发文量

164

审稿时长

3-6 weeks

期刊介绍： All topics of experimental and theoretical physics including gravitation, field theory, elementary particles and nuclei, plasma, nonlinear phenomena, condensed matter, superconductivity, superfluidity, lasers, and surfaces.