闪烁量热计反冲本底的判别
Discrimination of Recoil Backgrounds in Scintillating Calorimeters
摘要：
$\n{{}^{210}Po}$的α衰变是稀有事件搜索的危险背景。在这里，我们描述的观测相关的α衰变低温罕见事件搜索与超导温度计（CRESST）。我们发现铅核在我们的$0.0142\pm0.0013$的$\n{CaWO_4}$晶体中显示出相对于相同能量的电子的闪烁光产额。本文描述了一种利用反射箔鉴别核反冲本底源的方法，并证明了它的有效性。这导致光检测器的脉冲形状的可观察差异，其可用于标记这些事件。铅和电子反冲之间的声子探测器的脉冲形状的差异也被提取，打开窗口，未来额外的背景抑制技术的基础上，在这样的实验中的脉冲形状歧视。
英文摘要：
The alpha decay of $\n{{}^{210}Po}$ is a dangerous background to rare event searches. Here, we describe observations related to this alpha decay in the Cryogenic Rare Event Search with Superconducting Thermometers (CRESST). We find that lead nuclei show a scintillation light yield in our $\n{CaWO_4}$ crystals of $0.0142\pm0.0013$ relative to electrons of the same energy. We describe a way to discriminate this source of nuclear recoil background by means of a scintillating foil, and demonstrate its effectiveness. This leads to an observable difference in the pulse shape of the light detector, which can be used to tag these events. Differences in pulse shape of the phonon detector between lead and electron recoils are also extracted, opening the window to future additional background suppression techniques based on pulse shape discrimination in such experiments.
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