Journal of Sensor Science and Technology (센서학회지)

The Korean Sensors Society (한국센서학회)
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Afterglow Properties of LLBO Scintillation Crystal

리튬 루테튬 보레이트 섬광단결정의 잔광 특성

  • Kim, Sunghwan (Department of Radiological Science, Cheongju University)
  • Received : 2014.11.17
  • Accepted : 2014.11.28
  • Published : 2014.11.30
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Abstract

We grew a $Li_6Lu(BO_3)_3:Ce^{3+}$ single crystal as a new scintillator. And, the scintillation and thermoluminescence properties of the scintillator were determined. The emission spectrum of $Li_6Lu(BO_3)_3:Ce^{3+}$ is located in the range of 370~530 nm, peaking at 416 nm and 439 nm, due to the $5d{\rightarrow}4f$ transition of $Ce^{3+}$ ions. The fluorescence decay time of the crystal is composed two components. The fast component is 34 ns (84%) and the slow component is 125 ns (16%) of the crystal. The afterglow is caused by the electron and hole traps in the crystal lattice. We determined physical parameters of the traps in the crystal. The thermoluminescence trap are composed a trap. The determined activation energy (E) and frequency factor (s) of the TL trap are 1.05 eV and $4.4{\times}10^{10}s^{-1}$, respectively.

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