论文标题
通过使用14个高纯晶锗探测器，测量100mo富集的粉末样品的背景活动，用于Amore晶体
Measurement of the Background Activities of a 100Mo-enriched Powder Sample for an AMoRE Crystal Material by using Fourteen High-Purity Germanium Detectors
论文作者
论文摘要
在其第二阶段（AMORE-II）的先进钼的稀有过程实验将在200千克钼酸盐晶体中搜索100mO的中性s中心双β（0ν\ b {eta} \ b {eta}）衰变。为了在100MO的双β衰变Q值的能量范围内达到零背景水平，Amore晶体中的放射性污染水平应低。富含100MO同位素的100ENRMOO3粉末用于生长阿莫尔晶体。在9.6公斤粉末样品中，使用每个相对效率为70％的屏蔽阵列，每个相对效率为70％，每个相对效率为70％。位于扬阳地下实验室的名为CAGE的检测系统旨在测量自然放射性病或宇宙核素（如228AC，228AC，228th，226ra，88y和40k）的低放射性。粉末样品中228AC和228的活性分别为0.88 \ pm 0.12 MBQ/kg和0.669 \ pm 0.087 MBQ/kg。 226RA的活性测量为1.50 \ pm 0.23 MBQ/kg。 88y的活性为0.101 \ pm 0.016 MBQ/kg。 40K的活性被发现为36.0 \ pm 4.1 MBQ/kg。
The Advanced Molybdenum-based Rare process Experiment in its second phase (AMoRE-II) will search for neutrinoless double-beta (0ν\b{eta}\b{eta}) decay of 100Mo in 200 kg of molybdate crystals. To achieve the zero-background level in the energy range of the double-beta decay Q-value of 100Mo, the radioactive contamination levels in AMoRE crystals should be low. 100EnrMoO3 powder, which is enriched in the 100Mo isotope, is used to grow the AMoRE crystals. A shielded array of fourteen high-purity germanium detectors with 70% relative efficiency each was used for the measurement of background activities in a sample of 9.6-kg powder. The detector system named CAGe located at the Yangyang underground laboratory was designed for measuring low levels of radioactivity from natural radioisotopes or cosmogenic nuclides such as 228Ac, 228Th, 226Ra, 88Y, and 40K. The activities of 228Ac and 228Th in the powder sample were 0.88 \pm 0.12 mBq/kg and 0.669 \pm 0.087 mBq/kg, respectively. The activity of 226Ra was measured to be 1.50 \pm 0.23 mBq/kg. The activity of 88Y was 0.101 \pm 0.016 mBq/kg. The activity of 40K was found as 36.0 \pm 4.1 mBq/kg.
