PROPERTIES OF THE YAG-CE SCINTILLATOR
PROPERTIES OF THE YAG-CE SCINTILLATOR
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DOI：
10.1016/0168-9002(94)90500-2
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发表时间：
1994-07-01
影响因子：
1.4
通讯作者：
NORLIN, LO
中科院分区：
文献类型：
--
作者：
MOSZYNSKI, M;LUDZIEJEWSKI, T;NORLIN, LO
利用XP 2020 Q光电倍增管和S3590-03光电二极管的光读出，研究了新型YAG：Ce闪烁体的光产额、γ射线和α粒子引起的光脉冲形状、能量分辨率和时间分辨率。光产率为20 300 +/- 2000。使用三种独立的方法确定光子/MeV。由γ射线产生的光脉冲由两个分量组成，衰减时间常数分别为87.9 ns和302 ns。测量的α粒子的光脉冲表现出更快和更少的强度快的组件与衰减时间常数为68.4纳秒。能量分辨率分别为11.1%和11.7%的662 keV的γ射线从Cs-137源测量与光电倍增管和光电二极管读出，分别。用该晶体与XP 2020 Q光电倍增管耦合，对Co-60 γ射线（100 keV阈值）的时间分辨为1.3 ns。YAG：当光电二极管读出很重要时，峰值发射位于550 nm的Ce闪烁体是替代CsI（Tl）和BGO闪烁体检测轻带电粒子的良好候选材料。由于γ射线和α粒子而观察到的光脉冲形状的差异表明晶体在用于粒子识别的脉冲形状辨别方法中具有良好的性能。
Light yield, light pulse shape due to gamma-rays and alpha-particles, energy resolution and time resolution of the new YAG:Ce scintillator were studied using a light readout by means of the XP2020Q photomultiplier and the S3590-03 photodiode. The light yield of 20 300 +/- 2000. photons/MeV was determined using three independent methods. The light pulse produced by gamma-rays consists of two components with the decay time constants of 87.9 ns and 302 ns respectively. The light pulse measured for alpha-particles exhibits a faster and less intense fast component with the decay time constant of 68.4 ns. The energy resolution obtained was 11.1% and 11.7% for the 662 keV gamma-rays from a Cs-137 source as measured with the photomultiplier and the photodiode readout, respectively. A time resolution of 1.3 ns was observed for Co-60 gamma-rays (at 100 keV threshold) with the crystal coupled to the XP2020Q photomultiplier. The YAG: Ce scintillator with the peak emission at 550 nm is a good candidate to replace CsI(Tl) and BGO scintillators in detection of light charged particles when photodiode readout is of importance. The observed difference in the light pulse shape due to gamma-rays and alpha-particles suggests good performance of the crystal in the pulse shape discrimination method for the particle identification.