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Scintillation Light Yield Of Baf_2:ce

机译：Baf_2：ce的闪烁光产率

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摘要

BaF_2:Ce scintillator is a well-known, reasonably fast and efficient scintillator characterized by a decent stopping power and availability of large size crystals. In this communication we report scintillation light yield measurements on a number of BaF_2:Ce samples cut from one larger boule. We interpret these measurements in a frame of a simple one-dimensional model developed and first tested on LuAP and LuYAP samples. The model is expected to reproduce the observed strong dependence of the effective scintillation light yield against the height of the sample. The fit to experimental points provides a value of the "intrinsic" light yield LY(0), as well as a value of the "loss" parameter μ (scattering and absorption of scintillation light in the sample). Although the value of the loss parameter μ, at around 0.5 cm~(-1), found from the fit for BaF_2:Ce is clearly lower than a typical value in LuAP and LuYAP, it is, nevertheless, much higher than the value of about 0.05-0.07 cm~(-1) measured in Delft for LaBr_3:Ce. We have also measured the absorption spectra of BaF_2:Ce crystals. The corrected spectra have been used to estimate contributions from scattering, self-absorption (by Ce-ions) and parasitic absorption from unidentified centers in order to establish physical limits imposed on the light yield from these crystals.
机译：BaF_2：Ce闪烁体是一种众所周知的，相当快速有效的闪烁体，其特征在于具有良好的制动力和大尺寸晶体的可用性。在此通讯中，我们报告了从一个较大的晶锭上切下的许多BaF_2：Ce样品的闪烁光产率测量结果。我们在开发并首先在LuAP和LuYAP样本上测试的简单一维模型的框架中解释这些测量结果。该模型有望重现观察到的有效闪烁光产量对样品高度的强烈依赖性。对实验点的拟合提供了“本征”光产率LY（0）的值，以及“损耗”参数μ的值（样本中闪烁光的散射和吸收）。尽管从BaF_2：Ce的拟合值中得出的损耗参数μ的值大约在0.5 cm〜（-1）处，明显低于LuAP和LuYAP中的典型值，但仍远高于LuF和LuYAP的典型值。 LaBr_3：Ce的代尔夫特测量值约为0.05-0.07 cm〜（-1）。我们还测量了BaF_2：Ce晶体的吸收光谱。校正后的光谱已用于估算来自未识别中心的散射，自吸收（通过Ce离子）和寄生吸收的贡献，以便确定对这些晶体的光输出施加的物理限制。

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