闪烁体探测器中光的衰减通式（英文）  

A Universal Formula for Light Attenuation of Scintillator Detector

作　　者：蓝江山 赵凤仪[1,2] 丁萌 韩成栋 张亚鹏[1,2] 陈旭荣 LAN Jiangshan;ZHAO Fengyi;DING Meng;HAN Chengdong;ZHANG Yapeng;CHEN Xurong(Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China;School of Nuclear and Technology, University of Chinese Academy of Sciences, Beijing 100049, China)

机构地区：[1]中国科学院近代物理研究所,兰州730000 [2]中国科学院大学核科学与技术学院,北京100049

出　　处：《原子核物理评论》2019年第1期78-84,共7页Nuclear Physics Review

基　　金：National Key Research and Development Program of China(2016YFA0400201);National Natural Science Foundation of China(11673047,U1738127);CAS "Light of West China" Program(Y532050XB0)~~

摘　　要：闪烁体探测器被广泛应用于当今粒子物理与原子核物理实验中。研究闪烁探测器的光衰减规律(LASD)对时间和能量的准确测量都十分重要,这一点对条形闪烁探测器尤为如此。本文以圆柱闪烁探测器为例,对各向同性的闪烁光进行立体角积分,进而研究不同立体角下光程差异对结果的影响。在数值计算的基础上,导出了描述LASD的通用公式。在一定条件下,公式可以约化为双指数衰减形式。对于DAMPE上PSD的实验数据,该公式能使闪烁体远端的拟合偏差从大约10%降低至2%以下。同时,模型也能够很好地描述Kaiser实验、Gierlik实验和Platino实验的实验数据。Scintillator detectors are widely used in modern nuclear and particle physics experiments. Studying the light attenuation of scintillator detector(LASD) is vitally important for extracting proper measurements of energy and time. In this paper, we integrate the isotropic fluorescence over solid angle to study the influence on overall light-intensity from varying optical path at different angle. Based on numerical results,a universal formula for describing LASD is derived. Under certain condition, our formula can be written as a form of widely-used double-exponential function. The universal formula describes the experimental data of PSD at DAMPE, reducing the maximum deviation at far-side of the scintillator from ~10% to less than 2%. Moreover, our model also deciphers Kaiser’s experiment, Gierlik’s experiment and Platino’s experiment successfully.

关 键 词：闪烁探测器 光衰减 

分 类 号：O572.212[理学—粒子物理与原子核物理]