Scintillating properties of today available lead tungstate crystals

作者：M. Follin, V. Sharyy, J.-P. Bard, M. Korzhik, D. Yvon · 发表于：Journal of Instrumentation · 年份：2021 · DOI：10.1088/1748-0221/16/08/p08040 · 被引用次数：13 · 研究领域：Radiation Detection and Scintillator Technologies、Medical Imaging Techniques and Applications、Atomic and Subatomic Physics Research

In the context of the ClearMind project, we measured the scintillating properties, as induced from gamma ray interactions, of today available PbWO 4 crystal. We measured scintillation's yields and time constants by measuring the signal shape measured on a fast photo-multiplier and deconvoluting it from the instrumental effects. For the doped crystals at room temperature, we measured a fast scintillation component, with time constants of 2 ns, 55 % of the total light yield, and a slow component of 6 ns. We observe a significant increase of the light yield for the slow component when the temperature decreases and simultaneous increase of the time constants, but no increase in the fast component light yield. Our measurements reproduce the main qualitative features of PbWO 4 crystals quoted in the literature. Quantitatively though, we measured significantly shorter time constants and larger light yields. This is explained by a rigorous treatment of the instrumental contributions in the measurements. Results are discussed and prospect for future developments "tailored" for the ClearMind project are presented.