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| 用于暗物质探测实验的CsI(Tl)晶体探测器性能的实验研究 | |
| 引用本文： | 岳骞,刘延,李金,王子敬,王名儒. 用于暗物质探测实验的CsI(Tl)晶体探测器性能的实验研究[J]. 中国物理 C, 2002, 26(7): 728-734 |
| 作者姓名： | 岳骞 刘延 李金 王子敬 王名儒 |
| 作者单位： | [1]中国科学院高能物理研究所，北京100039 [2]中研院物理研究所，台北11529 |
| 基金项目： | 海峡两岸自然科学基金 ( 1 9975 0 5 0和 87-2 1 1 2 -M -0 0 1 -0 34,88-2 1 1 2 -M -0 0 1 -0 0 7)共同资助~~ |
| 摘 要： | 在直接测量暗物质的实验中,反冲核能量的Quenching Factor是一个重要参数.用低能X射线源对一套测量入射中子引起的反冲核能量Quenching Factor的系统进行了能量刻度,得到了这套系统的能量响应关系.PMT单光电子的发射对应于晶体中的能量沉积约为0.32keV.同时研究了不同能量的X射线引起的PMT输出电流信号的积分时间宽度与积分电荷的关系,得到最佳的PMT输出电荷收集条件. |
| 关 键 词： | 暗物质 CsI(Tl)晶体 单光电子 能量刻度 |
| 收稿时间： | 2001-08-13 |
Energy Calibration of CsI(Tl) Crystal for Quenching Factor Measurement in Dark Matter Search |
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| YUE Qian LIU Yan LI Jin WANG H T WANG M Z. Energy Calibration of CsI(Tl) Crystal for Quenching Factor Measurement in Dark Matter Search[J]. High Energy Physics and Nuclear Physics, 2002, 26(7): 728-734 | |
| Authors: | YUE Qian LIU Yan LI Jin WANG H T WANG M Z |
| Affiliation: | YUE Qian 1 LIU Yan 1 LI Jin 1 WANG H T 2 WANG M Z 31 |
| Abstract: | It is important to measure the quenching factor of recoiled nuclei of detector for direct detection of WIMP. Energy calibration of CsI(Tl) crystal detector for measuring quenching factor of recoiled nuclei induced by incident neutron beam has been done with low-energy X-ray sources such as 109 Cd and 133 Ba and the linearity of energy response of experimental system is obtained. The equivalent energy deposited in CsI(Tl) crystal of a single photoelectron of PMT has been measured. The time of integration of current signals is optimized for different X-ray source energys. |
| Keywords: | dark matter CsI(Tl) crystal single photoelectron energy calibration |
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