论文标题
Nexo的$^{127} $ XE校准源的开发
Development of a $^{127}$Xe calibration source for nEXO
论文作者
论文摘要
我们使用$^{127} $ XE电子捕获源研究Nexo实验的校准技术。 Nexo是针对中性元β衰减($0νββ$)的下一代搜索,它将使用5吨的单片液体氙时间投影室(TPC)。氙气既用作源和检测介质,又将在$^{136} $ XE中富集至90%。为了优化事件重建和能量分辨率,需要进行校准以绘制位置和时间依赖性检测器响应。与$^{136} $^{136} $ xe $0νββ$相比,$^{127} $ XE的36.3天半衰期及其小$ Q $价值将使在正常操作中连续维持较小的活动,而无需引入其他背景,从而实现了额外的校准和监控器的响应。在这项工作中,我们描述了生产源和初步实验测试的过程。然后,我们使用仿真来投射这种源可以将空间校正校正到Nexo TPC的光和电荷响应的精度。
We study a possible calibration technique for the nEXO experiment using a $^{127}$Xe electron capture source. nEXO is a next-generation search for neutrinoless double beta decay ($0νββ$) that will use a 5-tonne, monolithic liquid xenon time projection chamber (TPC). The xenon, used both as source and detection medium, will be enriched to 90% in $^{136}$Xe. To optimize the event reconstruction and energy resolution, calibrations are needed to map the position- and time-dependent detector response. The 36.3 day half-life of $^{127}$Xe and its small $Q$-value compared to that of $^{136}$Xe $0νββ$ would allow a small activity to be maintained continuously in the detector during normal operations without introducing additional backgrounds, thereby enabling in-situ calibration and monitoring of the detector response. In this work we describe a process for producing the source and preliminary experimental tests. We then use simulations to project the precision with which such a source could calibrate spatial corrections to the light and charge response of the nEXO TPC.