摘要
许多实验对用CsI(Tl)闪烁晶体作为探测器来寻找和探测暗物质的可行性进行了研究 .本工作利用 8MeV单能中子轰击CsI(Tl)晶体探测器来研究Cs核和I核的QuenchingFactor.在数据处理中 ,运用脉冲形状甄别 (PSD)方法来分辨反冲核信号和本底信号 .实验结果表明 ,在 7keV到 1 3 2keV的能区中 ,Quench ingFactor随着反冲核能量的减少而增加 .在探测暗物质的实验中 ,这一性质对于CsI(Tl)晶体探测器获得较低的能量阈值是很有利的 .
Detection of dark matter using CsI(Tl) scintillating crystal as the detector has gathered more and more interests. In this paper, the quenching factor of nuclear recoils induced by incident neutron beam was measured based on Pulse Shape Discrimination (PSD) method to identify events of nuclear recoils from background. It is shown that the quenching factor increases with the decreased recoil energy in the range of 7 keV to 132 keV. This result shows the great advantage of CsI(Tl) crystal detector in detecting of dark matter.
出处
《高能物理与核物理》
CSCD
北大核心
2002年第8期855-860,共6页
High Energy Physics and Nuclear Physics
基金
海峡两岸自然科学基金 (1 9975 0 5 0和 89 N FA0 1 1 4 2 ,89 2 1 1 2 M 0 0 1 0 5 6,90 2 1 1 2 M 0 0 1 0 3 7)共同资助~~
