Nuclear Techniques ›› 2020, Vol. 43 ›› Issue (5): 50501-050501.doi: 10.11889/j.0253-3219.2020.hjs.43.050501

• NUCLEAR PHYSICS, INTERDISCIPLINARY RESEARCH • Previous Articles     Next Articles

Investigation on thermoluminescence of phosphor YGaAG:Ce(Y2.96Ce0.04Al3.4Ga1.6O12)

Mingliang ZHAN,Yaoyao CHEN,Zhuo XU,Zhengye XIONG()   

  1. School of Electronic and Information Engineering, Guangdong Ocean University, Zhanjiang 524088, China
  • Received:2019-11-11 Revised:2020-02-02 Online:2020-05-15 Published:2020-05-07
  • Contact: Zhengye XIONG E-mail:xiongzhengye@139.com
  • About author:ZHAN Mingliang, male, born in 1998, undergraduate, majoring in electronic science and technology
  • Supported by:
    Science and Technology Planning Project of Guangdong Province(2015A020216020);Cultivation Project of "Sail of the sea - sailing plan" College Students' Scientific and Technological Innovation(qhjhzr201814)

Abstract: Background

Phosphor has become an important object of study in recent years due to their applications as potential laser crystal materials and packaging light emitting diode (LEDs). Phosphors are widely used in electronic devices, their effect of ionizing radiation to some electronic equipment needs to be evaluated in some conditions. One of the effective methods to measure the dose of ionizing radiation is thermoluminescence (TL).

Purpose

This study aims to investigate a kind of phosphor which can be directly used as a thermoluminescent dosimeter.

Method

First of all, green light emitting phosphors YGaAG:Ce(Y2.96Al3.4Ga1.6O12:0.04Ce) was prepared by the solid phase reaction method, and linear heating rate TL of the phosphor was measured. Then the linear heating rate method coupled with glow curve deconvolution (GCD) was used to calculate the activation energy and the frequency factor of electron traps within phosphor YGaAG:Ce. Finally, the dose response was measured systematically.

Results

Measured results show that there is only one remarkable and broad thermoluminescence peak in TL curve, and the temperature of this peak is about 185 °C. Four traps are identified in the phosphor, and the activation energies are 0.83 eV, 0.99 eV, 1.15 eV and 1.23 eV, respectively, and the corresponding frequency factors are 0.98×1010 Hz, 1.28×1011 Hz, 1.41×1012 Hz and 1.45×1012 Hz, respectively. The TL response of the phosphor has good linearity in a large dose range (0.1~200 Gy), and the sensitivity of TL is about 2 mGy.

Conclusions

The research findings show that phosphor YGaAG:Ce has a broad application prospect in the radiation dose detection of electronic equipment.

Key words: Phosphor, Thermoluminescence (TL), Trap, Dosimeter, Garnet

CLC Number: 

  • TL818+.4