Development of low radioactive molecular sieves for ultra-low background particle physics experiment
Development of low radioactive molecular sieves for ultra-low background particle physics experiment
复制标题
超低本底粒子物理实验用低放射性分子筛的研制
DOI：
10.1088/1748-0221/15/01/p01039
复制
发表时间：
2020
影响因子：
1.3
通讯作者：
M. Matsukura and H. Mimura
中科院分区：
文献类型：
--
作者：
H. Ogawa;K. Abe;M. Matsukura and H. Mimura
本研究开发了用于超低本底粒子物理实验的低放射性分子筛。制造的MS为4A型。用高纯锗（HPGe）探测器测量，226 Ra和232 Th的浓度分别为约57和198 mBq/kg。相对于商业产品，226 Ra和232 Th的放射性分别降低了约99%和97%。此外，用针式氡探测器测得的MS滤片的氡射出率约为2.1mBq。该质谱仪有望用于暗物质探测实验等需要低放射性的惰性气体中杂质的去除。
This study develops low radioactive molecular sieves (MS) for ultra-low background particle physics experiment. The manufactured MS is of type 4A. 226 Ra and 232 Th have concentrations of about 57 and 198 mBq/kg, respectively, measured with high-purity germanium (HPGe) detector. The achieved reduction of the radioactivity with respect to the commercial one is about 99 and 97 percent for 226 Ra and 232 Th, respectively. Furthermore, the radon emanation rate from MS filter is about 2.1 mBq, which is measured by utilizing pin-photo type radon detector. This developed MS is expected to remove the impurity from the noble gas, in which low radioactivity is needed such as dark matter search experiment.