论文标题
识别p型点中异常快速事件的识别
Identification of the anomalous fast bulk events in a p-type point contact germanium detector
论文作者
论文摘要
超低检测阈值，超低固有背景以及P型点接触式锗检测器的出色能量分辨率对于罕见的事实搜索非常重要，特别是对于检测直接暗物质相互作用，相干的弹性中性核中性核核散射和中性beta beta beta beta衰减。在CDEX-1B检测器中观察到具有极快增加时间的异常散装事件。我们报告了一种使用脉冲形状仿真和重建的源实验签名从批量事件中提取快速事件的方法。校准数据和固有放射性产生的X射线分布验证了快速散装在钝化层附近经历了一次命中。该锗探测器的性能表明它能够单击散装空间分辨率，因此提供了背景拆除技术。
The ultralow detection threshold, ultralow intrinsic background, and excellent energy resolution of p-type point-contact germanium detector are important for rare-event searches, in particular for the detection of direct dark matter interactions, coherent elastic neutrino-nucleus scattering, and neutrinoless double beta decay. Anomalous bulk events with an extremely fast rise time are observed in the CDEX-1B detector. We report a method of extracting fast bulk events from bulk events using a pulse shape simulation and reconstructed source experiment signature. Calibration data and the distribution of X-rays generated by intrinsic radioactivity verified that the fast bulk experienced a single hit near the passivation layer. The performance of this germanium detector indicates that it is capable of single-hit bulk spatial resolution and thus provides a background removal technique.
