Examining LEGEND-1000 cosmogenic neutron backgrounds in Geant4 and MCNP

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2024-05-01 DOI:10.1088/1748-0221/19/05/p05056

C.J. Barton, W. Xu, R. Massarczyk, S. Elliott

{"title":"Examining LEGEND-1000 cosmogenic neutron backgrounds in Geant4 and MCNP","authors":"C.J. Barton, W. Xu, R. Massarczyk, S. Elliott","doi":"10.1088/1748-0221/19/05/p05056","DOIUrl":null,"url":null,"abstract":"\n For next-generation neutrinoless double beta decay\n experiments, extremely low backgrounds are necessary. An\n understanding of in-situ cosmogenic backgrounds is critical to the\n design effort. In-situ cosmogenic backgrounds impose a depth\n requirement and especially impact the choice of host\n laboratory. Often, simulations are used to understand background\n effects, and these simulations can have large uncertainties. One way\n to characterize the systematic uncertainties is to compare unalike\n simulation programs. In this paper, a suite of neutron simulations\n with identical geometries and starting parameters have been\n performed with Geant4 and MCNP, using geometries relevant to the\n LEGEND-1000 experiment. This study is an important step in gauging\n the uncertainties of simulations-based estimates. To reduce project\n risks associated with simulation uncertainties, a novel alternative\n shield of methane-doped liquid argon is considered in this paper for\n LEGEND-1000, which could achieve large background reduction without\n requiring significant modification to the baseline design.","PeriodicalId":1,"journal":{"name":"Accounts of Chemical Research","volume":null,"pages":null},"PeriodicalIF":16.4000,"publicationDate":"2024-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Accounts of Chemical Research","FirstCategoryId":"5","ListUrlMain":"https://doi.org/10.1088/1748-0221/19/05/p05056","RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, MULTIDISCIPLINARY","Score":null,"Total":0}

引用次数: 0

Abstract

For next-generation neutrinoless double beta decay experiments, extremely low backgrounds are necessary. An understanding of in-situ cosmogenic backgrounds is critical to the design effort. In-situ cosmogenic backgrounds impose a depth requirement and especially impact the choice of host laboratory. Often, simulations are used to understand background effects, and these simulations can have large uncertainties. One way to characterize the systematic uncertainties is to compare unalike simulation programs. In this paper, a suite of neutron simulations with identical geometries and starting parameters have been performed with Geant4 and MCNP, using geometries relevant to the LEGEND-1000 experiment. This study is an important step in gauging the uncertainties of simulations-based estimates. To reduce project risks associated with simulation uncertainties, a novel alternative shield of methane-doped liquid argon is considered in this paper for LEGEND-1000, which could achieve large background reduction without requiring significant modification to the baseline design.

查看原文本刊更多论文

在 Geant4 和 MCNP 中检查 LEGEND-1000 宇宙中子背景

对于下一代无中子双贝塔衰变实验来说，极低的本底是必要的。了解原位宇宙本底对设计工作至关重要。原位宇宙本底对深度提出了要求，尤其会影响到主实验室的选择。通常使用模拟来了解本底效应，而这些模拟可能具有很大的不确定性。描述系统不确定性的一种方法是比较不同的模拟程序。本文利用 Geant4 和 MCNP，使用与 LEGEND-1000 实验相关的几何图形，进行了一套具有相同几何图形和起始参数的中子模拟。这项研究是衡量模拟估算不确定性的重要一步。为了降低与模拟不确定性相关的项目风险，本文考虑在 LEGEND-1000 实验中使用掺甲烷液氩的新型替代屏蔽，这种屏蔽可以在不需要对基线设计进行重大修改的情况下实现本底的大幅降低。

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

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.