Effects of yttrium content on intrinsic radioactivity energy spectra of LYSO:Ce crystals

被引：6
|
作者：
Wan, Bo [1 ,2 ,3 ]
Yang, Fan [4 ]
Ding, Dongzhou [2 ,3 ,5 ]
Zhao, Shuwen [2 ,3 ]
Xie, Jianjun [1 ]
Chen, Lu [1 ,2 ,3 ]
Shi, Junjie [5 ]
机构：
[1] Shanghai Univ, Sch Mat Sci & Engn, Shanghai 200444, Peoples R China
[2] Chinese Acad Sci, Shanghai Inst Ceram, 585 Heshuo Rd, Shanghai 201899, Peoples R China
[3] Univ Chinese Acad Sci, Ctr Mat Sci & Optoelect Engn, 19A Yuquan Rd, Beijing 100049, Peoples R China
[4] Nankai Univ, Sch Phys, Key Lab Weak Light Nonlinear Photon, Minist Educ, Tianjin 300071, Peoples R China
[5] Shanghai Inst Ceram, R&D Ctr, 215 Chengbei Rd, Shanghai 201899, Peoples R China
来源：
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT | 2021年 / 1001卷 / 1001期
基金：
中国国家自然科学基金;
关键词：
LYSO; Lu-176; Intrinsic radioactivity; Energy spectra; Energy resolution; Size effect; LSO; SCINTILLATORS; CE;
D O I：
10.1016/j.nima.2021.165263
中图分类号：
TH7 [仪器、仪表];
学科分类号：
0804 ; 080401 ; 081102 ;
摘要：
This work investigates the intrinsic radioactivity of Lu2(1-x)Y2xSiO5:Ce (LYSO:Ce) crystals grown by Czochralski method (Cz) with various yttrium (shortened as Y) contents (x= 0-100 at.%). Energy spectra of the crystals excited with Cs-137 and the intrinsic radioactivity related to Lu-176 atoms as a function of Y content were investigated. It is illustrated that the intrinsic radioactivity depends on the content of Y, which also affects the energy spectrum and energy resolution of LYSO crystal. Results show that energy resolution of LYSO:Ce crystals can be improved by subtracting background spectra from the energy spectra. The experiment result also confirms the size effect of intrinsic radioactivity in LYSO:Ce crystal. For the LYSO crystal in large size, the influence of intrinsic radioactivity on the energy spectrum cannot be ignored, while it can be weakened by background subtracting.
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页数：6
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