Nuclear Techniques ›› 2020, Vol. 43 ›› Issue (3): 30401-030401.doi: 10.11889/j.0253-3219.2020.hjs.43.030401

• NUCLEAR ELECTRONICS AND INSTRUMENTATION • Previous Articles     Next Articles

Study on performance of Yttrium doped BaF2 scintillation detector

Hongfeng WANG1,2,Fuyan LIU2,Yingjie WANG2,Junfeng CHEN3,Peng KUANG2,Peng ZHANG2,Runsheng YU2,Xingzhong CAO2(),Yuxiao LI1(),Baoyi WANG2   

  1. 1.School of Physics (School of Microelectronics), Zhengzhou University, Zhengzhou 450001, China
    2.Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
    3.Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 201899, China
  • Received:2019-11-21 Revised:2020-02-24 Online:2020-03-15 Published:2020-03-24
  • Contact: Xingzhong CAO,Yuxiao LI E-mail:caoxzh@ihep.ac.cn;liyuxiao@zzu.edu.cn
  • About author:WANG Hongfeng, male, born in 1994, graduated from Jinggangshan University in 2017, master student, focusing on study of positron annihilation spectroscopy technology
  • Supported by:
    National Natural Science Foundation of China(11575205);the Scientific Instrument Developing Project of Chinese Academy of Sciences(YJKYYQ20180007)

Abstract: Background

BaF2 scintillation detector is commonly used in low intensity γ-ray detection experiments, and it is easy to pileup during high intensity γ-ray detection.

Purpose

This study aims to investigate the performance of Yttrium doped BaF2 (Yttrium doped with 1 at%, atomic percentage) scintillation detector with main concern of pileup and time resolution for high intensity γ-ray detection.

Methods

The energy resolution and time properties of Yttrium doped BaF2 (Yttrium doped with 1 at%) scintillation detector were experimentally tested by using 0.511 MeV γ-ray generated after positron annihilation from 22Na source. As a comparison, the normal BaF2 detector was also tested.

Results

The experimental results show that the ratio of fast and slow components of Yttrium doped BaF2 crystal (1:1.1) is much higher than that of BaF2 crystal (1:5), but the energy resolution of Yttrium doped BaF2 detector (38%) is worse than that of BaF2 detector (19%). For high intensity γ-ray detection, the Yttrium doped BaF2 detector have better time resolution than the BaF2 detector.

Conclusions

The decrease of the slow component in Yttrium doped BaF2 crystal can shorten the time width of the detector output signal, hence reduce the signals' pileup and improve the time resolution of the detector in high count rate environment.

Key words: Scintillation detector, Yttrium doped BaF2 crystal, Energy/time resolution, High intensity γ-ray, Pileup

CLC Number: 

  • TL812,TL817