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LiYSiO4: La 열형광체의 온도에 따른 열발광 특성

Thermoluminescent Properties by the Cooling Temperature and Grain Size in the LiYSiO4 : La Phosphors

  • 김영국 (경남대학교 전기공학과)
  • Kim, Young-Kook (Department of Electrical Engineering, Kyungnam University)
  • 발행 : 2009.09.27

초록

The thermoluminescent phosphors of LiYSi$O_4$ containing rare earth metal(La) dopants of 1 wt.%5 wt.% were prepared, and their TL characteristics have been investigated as a function of parameters such as the doping level and the heating rate. The grain size and cooling temperature of the highly sensitive LiYSi$O_4$: La phosphors have been investigated. The glow curve of LiYSi$O_4$: La has two peaks ($P_1,\;P_2$), and the peak height ratio of the two peaks is called $P_2/P_1$; here, the main peak is $P_2$. Experimental results indicate that the peak height ratios of the glow curve for LiYSi$O_4$: La are clearly correlated with the grain size and cooling temperature. The maximum $P_2/P_1$ ratio 3.25, the maximum sensitivity was observed for a grain size between 100-150 ${\mu}m$. The intensity of the TL peak of the phosphors was linearly proportion to the dose of X-rays.

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