Energy resolution of scintillation detectors with large area avalanche photodiodes and photomultipliers light readout
Energy resolution of scintillation detectors with large area avalanche photodiodes and photomultipliers light readout
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DOI：
10.1109/nssmic.1997.672570
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发表时间：
1997-11
期刊：
影响因子：
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通讯作者：
M. Moszynski;M. Kapusta;D. Wolski;M. Szawłowski;W. Klamra
中科院分区：
文献类型：
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作者：
M. Moszynski;M. Kapusta;D. Wolski;M. Szawłowski;W. Klamra
用直径为16 mm的大面积雪崩光电二极管（LAAPD）和直径为52 mm的光电倍增管研究了NaI：Tl、CsI：Tl、BGO、GSO、雅普和LSO等小晶体的能量分辨率。对于来自/sup 137/Cs源的662 keV /spl γ/-射线，对于与LAAPD耦合的直径为9 mm、高为9 mm的CsI（Tl）闪烁体，获得了4.8%的最佳结果。在LAAPD和光电倍增管中产生的初级电子空穴对的测量数量，以及LAAPD的噪声贡献，允许定量讨论的结果。它已被证明，与LAAPD测量的能量分辨率是可比的，或显着更好（在某些发射波长），比光电倍增管获得的。我们观察到，在能量，100千电子伏以上，与大多数晶体和LAAPD测量的能量分辨率是微弱的光电二极管噪声贡献的影响。本文还讨论了LAAPD在闪烁探测器能谱测量中的优点和局限性。
The energy resolution of small NaI:Tl, CsI:Tl, BGO, GSO, YAP and LSO crystals was studied using 16 mm diameter large area avalanche photodiodes (LAAPD) and a 52 mm diameter photomultiplier. The best result of 4.8% for the 662 keV /spl gamma/-rays from a /sup 137/Cs source was obtained for a 9 mm in diameter by 9 mm high CsI(Tl) scintillator coupled to an LAAPD. Measured number of primary electron-hole pairs produced in the LAAPD and photoelectrons in the photomultiplier, as well as the noise contribution of the LAAPD, allow for quantitative discussion of the results. It has been shown that the energy resolutions measured with LAAPDs are comparable, or significantly better (at certain emission wavelengths), than those obtained with the photomultiplier. We observed that at energies, above 100 keV, the energy resolution measured with majority of crystals and the LAAPDs was weakly affected by photodiode noise contribution. The advantages and limitations of the LAAPDs in energy spectrometry with scintillation detectors are also discussed here.