Purification of the NaI(Tl) crystal for dark matter search project PICOLON
Purification of the NaI(Tl) crystal for dark matter search project PICOLON
复制标题
用于暗物质搜索项目 PICOLON 的 NaI(Tl) 晶体的纯化
DOI：
10.1088/1742-6596/1468/1/012054
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发表时间：
2020
期刊：
影响因子：
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通讯作者：
Yoshida S.
中科院分区：
文献类型：
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作者：
Kanemitsu Y.;Chernyak D.;Ejiri H.;Fushimi K.;Hata K.;Hazama R.;Ikeda H.;Imagawa K.;Inoue K.;Kozlov A.;Orito R.;Shima T.;Takemoto Y.;Umehara S.;Yasuda K.;Yoshida S.
直接寻找暗物质是天体物理学的重要问题之一。暗物质的重大信号将是澄清宇宙起源的一个线索。只有DAMA/LIBRA实验用NaI（Tl）探测器曾暗示暗物质信号的存在。用NaI（Tl）探测器验证DAMA/LIBRA结果是一项紧迫而重要的任务。我们曾尝试提纯NaI（Tl）晶体来寻找暗物质。在本报告中，纯化的现状将进行讨论。钾的浓度成功地降低到所需的灵敏度。较难还原的~（210）Pb得到有效还原。介绍了神冈天文台低本底观测的现状。
Direct search for dark matter is one of the most important problems in astrophysics. Significant signal for dark matter will be a hint to clarify the origin of the universe. Only DAMA/LIBRA experiment with NaI (Tl) detector has ever suggested the presence of dark matter signal. Verifying the DAMA/LIBRA result by a NaI (Tl) detector is urgent and important task. We have tried to purify NaI (Tl) crystal to search for dark matter. In this presentation, the present status of purification will be discussed. The concentration of potassium is successfully reduced to desired sensitivity. The 210 Pb, which is difficult to reduce, has been reduced effectively. Present status of low background measurement in Kamioka observatory will be shown.