Investigation of neutron shielding materials for low-background gamma spectrometry

被引：0
作者：
Abdul J. Khan
Xin Li
Douglas K. Haines
Timothy J. Hoffman
Thomas M. Semkow
机构：
[1] Wadsworth Center,Department of Environmental Health Sciences, School of Public Health
[2] New York State Department of Health,undefined
[3] Empire State Plaza,undefined
[4] University at Albany,undefined
[5] State University of New York,undefined
来源：
Journal of Radioanalytical and Nuclear Chemistry | 2021年 / 328卷
关键词：
Muon-induced neutron; Borated polyethylene; Lithiated polyethylene; Plastic scintillator; Adhesive sealant;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
In gamma spectrometers located at ground-level or in shallow-underground laboratories, muon-induced neutrons contribute significantly to the background. We studied several neutron-shielding materials including water, pure polyethylene (PPE), borated polyethylene (BPE) and lithiated polyethylene (LPE) positioned inside the lead shield. Neutrons are scattered and absorbed inside these materials, however, sequential (n,n′γ), (n,γ) and (n,α) reactions generate gamma emissions. The resulting background increased by 35.9% for water and 37.6% for PPE. For BPE, the background increased by 11.3% only and it decreased by 9.4% for LPE, owing to the absorption of neutrons by boron and lithium, respectively.
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页码：941 / 950
页数：9
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