WIMPs search by means of the highly segmented scintillator
WIMPs search by means of the highly segmented scintillator
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WIMP 通过高度分段的闪烁体进行搜索
DOI：
10.1143/jpsj.74.3117
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发表时间：
2005
影响因子：
1.7
通讯作者：
S. Yoshida
中科院分区：
文献类型：
--
作者：
K. Fushimi;H. Kawasuso;M. Toi;E. Aihara;R. Hayami;S. Nakayama;N. Koori;R. Hazama;K. Ichihara;Y. Shichijo;S. Umehara;S. Yoshida
提出了寻找 WIMP 暗物质粒子的高灵敏度方法。薄NaI(Tl)板阵列对于区分WIMPs事件和背景事件具有很大的选择性。描述了 WIMP 信号选择的原理。通过应用多层 NaI(Tl) 探测器系统，有望对 SD（自旋相关）型 WIMP 具有高灵敏度。研究核和粒子稀有过程迫切需要一种高灵敏度的测量方法。粒子天体物理和核物理领域对高灵敏度辐射探测器的需求不断增加。特别是，寻找暗物质候选者和寻找无中微子双贝塔衰变需要从大量的背景信号事件中选择信号事件。在WIMPs搜索中，ELEGANT、1 DAMA 2等研究组应用了大量的NaI(Tl)闪烁体。 XMASS 3组、ZEPLIN 4组等提出了具有数百公斤闪烁体的大体积闪烁体新项目。许多小组正在尝试通过开发大体积和低背景探测器来提高灵敏度。然而，对于较大的探测器来说，由于其位置分辨率较差，减少背景事件变得更加困难。我们提出了高选择性探测器系统来提取 WIMP 信号。探测器的分割产生了良好的位置分辨率，从而提高了 WIMP 的灵敏度。
The highly sensitive method to search for WIMPs dark matter particles is proposed. An array of thin NaI(Tl) plate has the great selectivity for distinguishing the WIMPs events and background ones. The principle of signal selection for WIMPs is described. The high sensitivity for SD (spin-dependent) type WIMPs is expected by applying multi-layer system of NaI(Tl) detector. A method of highly sensitive measurement is strongly needed to study nuclear and particle rare processes. The need for highly sensitive radiation detector has been increased in the fields of particle astrophysics and nuclear physics. Particularly, the search for dark matter candidates and the search for neutrino-less double beta decay need to select the signal events from the huge number of background ones. In the case of WIMPs search, the groups such as ELEGANT, 1 DAMA 2 applied the huge volume of NaI(Tl) scintillator. The new project with the huge volume scintillator are proposed with hundreds kg of scintillators by XMASS 3 group, ZEPLIN group 4 and so on. The many groups are trying to enhance the sensitivity by developing a large volume and low background detectors. However, to reduce the background events becomes more difficult for the larger detectors because of its poor position resolution. We propose highly selective detector system to extract the signals of WIMPs. The segmentation of a detector results good position resolution, which enhances the sensitivity for WIMPs.