新scintillator CLYC的表征
Characterization of the new scintillator CLYC
摘要：
在北京玻璃研究所用垂直布里奇曼法生长出了国内第一个无机闪烁体CLYC。在这项工作中，我们评估了这种新的CLYC晶体的γ射线能量分辨率和中子和γ射线之间的脉冲形状歧视（PSD）能力方面的性能。通过将衰变函数拟合到中子和γ射线的波形结构中，得到了不同闪烁机制下的衰变时间。我们发现662 keV的伽马射线和有效的中子/伽马PSD与FoM 2.6的能量分辨率为4.5%。在γ射线激发下，CLYC存在超快闪烁机制，衰变时间约为2ns，而在热中子激发下没有超快衰变的证据。这一工作有助于促进CLYC在国内的发展。
英文摘要：
The first domestic inorganic scintillator CLYC was grown in Beijing Glass Research Instituteusing the vertical Bridgman method. In this work, we evaluated the performance of this new CLYC crystal in terms of gamma-ray energy resolution and pulse shape discrimination(PSD)capability between neutrons and gamma-rays. The decay times occurred throughdifferent scintillation mechanisms were achievedby fitting decay functions to the neutron and gamma-ray waveform structures. We found an energy resolution of 4.5% for 662-keV gamma-rays and efficient neutron/gamma PSD withFoM 2.6. Under gamma-ray excitation, there is ultrafast scintillation mechanism in CLYC, with a decay time about 2 ns,whereasthere is no evidence of ultrafast decay under thermal neutron excitation. This work contributes to promote domestic development of CLYC.
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