Abstract A PbMoO4 single crystal as a perspective detector for neutrinoless double beta decay experiment was grown by the Czochralski technique from high purity raw materials including archaeological lead. Charge trapping and energy transfer phenomena in this crystal have been studied by electron paramagnetic resonance (EPR) and wavelength-resolved thermally stimulated luminescence (TSL). EPR revealed several impurities, which however do not participate in the charge trapping processes: Gd3+, Cr3+, Mn2+. Self-trapped electron and (MoO4)3--VPb centers creation under laser light was confirmed. At least six glow peaks related to the thermal release of the charge carriers were observed having maxima at 41 K, 53 K, 83 K, 90 K, 105 K and 118 K. The peak at 41 K was ascribed to the de-trapping of self-trapped electrons. The 53 K one, in particular, is created by re-trapping processes. Partial cleaning procedure followed by the initial rise method allow to determine the trap depths and frequency factors for the 90 K and 105 K glow peaks. They have been referred to the (MoO4)3--VPb decay. A three-component analysis of the spectra could explain the observed 100 nm red shift of the thermo-luminescence emission maximum.

中文翻译：

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从考古铅中生长的 archPbMoO4 钼酸铅晶体的发光和电荷捕获特征

摘要 以考古铅等高纯度原材料为原料，采用直拉技术制备了PbMoO4单晶，作为中微子双β衰变实验的透视探测器。已经通过电子顺磁共振 (EPR) 和波长分辨热激发发光 (TSL) 研究了该晶体中的电荷俘获和能量转移现象。EPR 揭示了几种不参与电荷俘获过程的杂质：Gd3+、Cr3+、Mn2+。确认了激光下自陷电子和 (MoO4)3--VPb 中心的产生。观察到至少六个与电荷载流子热释放相关的辉光峰在 41 K、53 K、83 K、90 K、105 K 和 118 K 处具有最大值。 41 K 处的峰归因于自陷电子。尤其是 53 K，是通过重新捕获过程创建的。部分清洁程序后跟初始上升方法可以确定 90 K 和 105 K 辉光峰的陷阱深度和频率因子。它们被称为 (MoO4)3--VPb 衰变。光谱的三分量分析可以解释观察到的热致发光发射最大值的 100 nm 红移。