Ultra-low background mass spectrometry for rare-event searches
Ultra-low background mass spectrometry for rare-event searches
复制标题
用于罕见事件搜索的超低背景质谱
DOI:
10.1016/j.nima.2017.10.014
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发表时间:
2018
期刊:
影响因子:
--
通讯作者:
Dobson J
中科院分区:
文献类型:
--
作者:
Dobson J
Inductively Coupled Plasma Mass Spectrometry (ICP-MS) allows for rapid, high-sensitivity determination of trace impurities, notably the primordial radioisotopes238U and232Th, in candidate materials for low-background rare-event search experiments. We describe the setup and characterisation of a dedicated low-background screening facility at University College London where we operate an Agilent 7900 ICP-MS. The impact of reagent and carrier gas purity is evaluated and we show that twice-distilled ROMIL-SpATM-grade nitric acid and zero-grade Ar gas delivers similar sensitivity to ROMIL-UpATM-grade acid and research-grade gas. A straightforward procedure for sample digestion and analysis of materials with U/Th concentrations down to 10 ppt g/g is presented. This includes the use of233U and230Th spikes to correct for signal loss from a range of sources and verification of238U and232Th recovery through digestion and analysis of a certified reference material with a complex sample matrix. Finally, we demonstrate assays and present results from two sample preparation and assay methods: a high-sensitivity measurement of ultra-pure Ti using open digestion techniques, and a closed vessel microwave digestion of a nickel–chromium-alloy using a multi-acid mixture.
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影响因子:
3.5
作者:
Scovell P
通讯作者:
Scovell P
DOI:
--
发表时间:
2017
期刊:
ArXiv e-prints
影响因子:
--
作者:
Akerib D. S.
通讯作者:
Akerib D. S.
影响因子:
5
作者:
Dang TKM;Nikzad M;Truong VK;Masood S;Nguyen CK;Sbarski I
通讯作者:
Sbarski I
DOI:
--
发表时间:
2014
期刊:
影响因子:
--
作者:
D. Leonard
通讯作者:
D. Leonard