标题： 低本底探测器使用富集的¹¹⁶CdWO₄晶体闪烁体以搜索¹¹⁶Cd的双β衰变 显示英文标题

标题： Low background detector with enriched 116CdWO4 crystal scintillators to search for double beta decay of 116Cd

摘要： 一种富含$^{116}$Cd 至 82%、质量为 1868 克的钨酸镉晶体棒是通过低热梯度柴可拉斯基技术生长的。 镉的同位素组成以及晶体中的痕量污染通过高分辨率电感耦合等离子体质谱进行了估算。 从该晶体棒中制备的闪烁体进行了表征，包括透光率和能量分辨率的测量。 开发了一种低本底闪烁探测器，包含两个$^{116}$CdWO$_4$晶体闪烁体（586 克和 589 克）。 该探测器在意大利 INFN 的格兰萨索国家实验室地下运行了 1727 小时，这使得能够估算富集晶体闪烁体的放射性污染。 第三块$^{116}$CdWO$_4$样品（326 克）的辐射纯度通过超低本底高纯锗$\gamma$探测器进行了测试。 Monte Carlo simulations of double $\beta$ processes in $^{116}$Cd were used to estimate the sensitivity of an experiment to search for double $\beta$ decay of $^{116}$Cd. 显示英文摘要

摘要： A cadmium tungstate crystal boule enriched in $^{116}$Cd to 82% with mass of 1868 g was grown by the low-thermal-gradient Czochralski technique. The isotopic composition of cadmium and the trace contamination of the crystal were estimated by High Resolution Inductively Coupled Plasma Mass-Spectrometry. The crystal scintillators produced from the boule were subjected to characterization that included measurements of transmittance and energy resolution. A low background scintillation detector with two $^{116}$CdWO$_4$ crystal scintillators (586 g and 589 g) was developed. The detector was running over 1727 h deep underground at the Gran Sasso National Laboratories of the INFN (Italy), which allowed to estimate the radioactive contamination of the enriched crystal scintillators. The radiopurity of a third $^{116}$CdWO$_4$ sample (326 g) was tested with the help of ultra-low background high purity germanium $\gamma$ detector. Monte Carlo simulations of double $\beta$ processes in $^{116}$Cd were used to estimate the sensitivity of an experiment to search for double $\beta$ decay of $^{116}$Cd.