新的探测系统提高了关键恒星(n,γ)测量的灵敏度

J. Lerendegui-Marco, V. Babiano-Su'arez, J. Balibrea-Correa, C. Domingo-Pardo, I. Ladarescu, A. Tarifeño-Saldivia, V. Alcayne, D. Cano-Ott, E. Gonz'alez-Romero, T. Mart'inez, E. Mendoza, C. Guerrero, F. Calviño, A. Casanovas, U. Koster, N. Chiera, R. Dressler, E. Maugeri, D. Schumann, The nTOF Collaboration
{"title":"新的探测系统提高了关键恒星(n,γ)测量的灵敏度","authors":"J. Lerendegui-Marco, V. Babiano-Su'arez, J. Balibrea-Correa, C. Domingo-Pardo, I. Ladarescu, A. Tarifeño-Saldivia, V. Alcayne, D. Cano-Ott, E. Gonz'alez-Romero, T. Mart'inez, E. Mendoza, C. Guerrero, F. Calviño, A. Casanovas, U. Koster, N. Chiera, R. Dressler, E. Maugeri, D. Schumann, The nTOF Collaboration","doi":"10.1051/epjconf/202327913001","DOIUrl":null,"url":null,"abstract":"Neutron capture cross-section measurements are fundamental in the study of astrophysical phenomena, such as the slow neutron capture (s-) process of nucleosynthesis operating in red-giant and massive stars. However, neutron capture measurements via the time-of-flight (TOF) technique on key s-process nuclei are often challenging. Difficulties arise from the limited mass (∼mg) available and the high sample-related background in the case of the unstable s-process branching points. Measurements on neutron magic nuclei, that act as s-process bottlenecks, are affected by low (n,γ) cross sections and a dominant neutron scattering background. Overcoming these experimental challenges requires the combination of facilities with high instantaneous flux, such as n_TOFEAR2, with detection systems with an enhanced detection sensitivity and high counting rate capabilities. This contribution reviews some of the latest detector developments in detection systems for (n,γ) measurements at n_TOF, such as i-TED, an innovative detection system which exploits the Compton imaging technique to reduce the dominant neutron scattering background and s-TED, a highly segmented total energy detector intended for high flux facilities. The discussion will be illustrated with results of the first measurement of key the s-process branching-point reaction 79Se(n,γ).","PeriodicalId":11731,"journal":{"name":"EPJ Web of Conferences","volume":"30 1","pages":""},"PeriodicalIF":0.0000,"publicationDate":"2023-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"3","resultStr":"{\"title\":\"New detection systems for an enhanced sensitivity in key stellar (n,γ) measurements\",\"authors\":\"J. Lerendegui-Marco, V. Babiano-Su'arez, J. Balibrea-Correa, C. Domingo-Pardo, I. Ladarescu, A. Tarifeño-Saldivia, V. Alcayne, D. Cano-Ott, E. Gonz'alez-Romero, T. Mart'inez, E. Mendoza, C. Guerrero, F. Calviño, A. Casanovas, U. Koster, N. Chiera, R. Dressler, E. Maugeri, D. Schumann, The nTOF Collaboration\",\"doi\":\"10.1051/epjconf/202327913001\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Neutron capture cross-section measurements are fundamental in the study of astrophysical phenomena, such as the slow neutron capture (s-) process of nucleosynthesis operating in red-giant and massive stars. However, neutron capture measurements via the time-of-flight (TOF) technique on key s-process nuclei are often challenging. Difficulties arise from the limited mass (∼mg) available and the high sample-related background in the case of the unstable s-process branching points. Measurements on neutron magic nuclei, that act as s-process bottlenecks, are affected by low (n,γ) cross sections and a dominant neutron scattering background. Overcoming these experimental challenges requires the combination of facilities with high instantaneous flux, such as n_TOFEAR2, with detection systems with an enhanced detection sensitivity and high counting rate capabilities. This contribution reviews some of the latest detector developments in detection systems for (n,γ) measurements at n_TOF, such as i-TED, an innovative detection system which exploits the Compton imaging technique to reduce the dominant neutron scattering background and s-TED, a highly segmented total energy detector intended for high flux facilities. The discussion will be illustrated with results of the first measurement of key the s-process branching-point reaction 79Se(n,γ).\",\"PeriodicalId\":11731,\"journal\":{\"name\":\"EPJ Web of Conferences\",\"volume\":\"30 1\",\"pages\":\"\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2023-03-15\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"3\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"EPJ Web of Conferences\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1051/epjconf/202327913001\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"EPJ Web of Conferences","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1051/epjconf/202327913001","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 3

摘要

中子俘获截面测量是研究天体物理现象的基础,例如在红巨星和大质量恒星中运行的核合成的慢中子俘获过程。然而,通过飞行时间(TOF)技术对关键s过程核进行中子捕获测量通常具有挑战性。在不稳定的s过程分支点的情况下,困难来自有限的可用质量(~ mg)和高样本相关背景。作为s过程瓶颈的中子魔核的测量受到低(n,γ)横截面和主要中子散射背景的影响。克服这些实验挑战需要将具有高瞬时通量的设施(如n_TOFEAR2)与具有增强检测灵敏度和高计数率能力的检测系统相结合。这篇文章回顾了n_TOF (n,γ)测量检测系统的一些最新探测器发展,例如i-TED,一种利用康普顿成像技术减少主要中子散射背景的创新检测系统和s-TED,一种用于高通量设施的高度分段总能量探测器。讨论将用s过程支点反应79Se(n,γ)的第一次关键测量结果来说明。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
New detection systems for an enhanced sensitivity in key stellar (n,γ) measurements
Neutron capture cross-section measurements are fundamental in the study of astrophysical phenomena, such as the slow neutron capture (s-) process of nucleosynthesis operating in red-giant and massive stars. However, neutron capture measurements via the time-of-flight (TOF) technique on key s-process nuclei are often challenging. Difficulties arise from the limited mass (∼mg) available and the high sample-related background in the case of the unstable s-process branching points. Measurements on neutron magic nuclei, that act as s-process bottlenecks, are affected by low (n,γ) cross sections and a dominant neutron scattering background. Overcoming these experimental challenges requires the combination of facilities with high instantaneous flux, such as n_TOFEAR2, with detection systems with an enhanced detection sensitivity and high counting rate capabilities. This contribution reviews some of the latest detector developments in detection systems for (n,γ) measurements at n_TOF, such as i-TED, an innovative detection system which exploits the Compton imaging technique to reduce the dominant neutron scattering background and s-TED, a highly segmented total energy detector intended for high flux facilities. The discussion will be illustrated with results of the first measurement of key the s-process branching-point reaction 79Se(n,γ).
求助全文
通过发布文献求助,成功后即可免费获取论文全文。 去求助
来源期刊
自引率
0.00%
发文量
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
copy
已复制链接
快去分享给好友吧!
我知道了
右上角分享
点击右上角分享
0
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术官方微信