A LaF3 : Nd(10%) scintillation detector with microgap gas chamber read-out for the detection of γ-rays
A LaF3 : Nd(10%) scintillation detector with microgap gas chamber read-out for the detection of γ-rays
复制标题
LaF3：Nd(10%) 闪烁探测器，具有微间隙气室读数，用于检测 γ 射线
DOI：
10.1016/s0168-9002(97)00237-4
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发表时间：
1997
影响因子：
1.4
通讯作者：
P. Sarro
中科院分区：
文献类型：
--
作者：
J. V. D. Marel;V. Bom;C. Eijk;R. Hollander;P. Sarro
将LaF_3：Nd（10%）闪烁晶体置于微隙气室中，制成位置灵敏γ射线探测器。直接在晶体上蒸发一薄层镍，并在其上蒸发一层薄的半透明CsI光电阴极。闪烁体晶体中吸收的γ射线产生紫外线闪光，从而释放光电阴极中的电子。这些电子在微间隙室中倍增并被检测到。通过将该探测器用511 keV γ射线照射时测得的光谱与Monte Carlo模拟中计算的光谱进行比较，得出结论，闪烁体中产生的UV光光子在光电阴极中产生光电子的概率约为2.5%。
A LaF3: Nd(10%) scintillator crystal has been placed in a microgap gas chamber to obtain a position-sensitive detector for γ-rays. Directly on the crystal a thin layer of nickel is evaporated, and on top of that a thin semi-transparant CsI photocathode. γ-rays absorbed in the scintillator crystal produce a UV-light flash, which liberates electrons in the photocathode. These electrons are multiplied and detected in the microgap chamber. By comparing the spectrum measured when this detector is irradiated with 511 keV γ-rays with a spectrum that is computed in a Monte Carlo simulation, it is concluded that the probability that a UV-light photon created in the scintillator produces a photo-electron in the photocathode, is about 2.5%.