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Organic glass scintillator bars with dual-ended readout
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment ( IF 1.4 ) Pub Date : 2021-07-26 , DOI: 10.1016/j.nima.2021.165676
Nathan P. Giha 1 , William M. Steinberger 1 , Lucas Q. Nguyen 2 , Joseph S. Carlson 2 , Patrick L. Feng 2 , Shaun D. Clarke 1 , Sara A. Pozzi 1
Affiliation  

Organic glass scintillator (OGS) bars (6 × 6 × 50 mm3) were melt-cast and characterized with dual-ended readout by silicon photomultiplier arrays. The results were compared to trans-stilbene bars of the same size. Energy resolution was measured via a 137Cs Compton-coincidence experiment. Time resolution was determined via a 22Na coincidence-timing experiment. Depth-of-interaction resolution was measured by moving a gamma-ray fan beam along the major axis of the bars. Pulse shape discrimination capability and neutron light output were determined via a time-of-flight measurement of a 252Cf source. The OGS bars exhibited better energy resolution at 478 keV (10.3±0.5% vs. 11.2±0.5%), better time resolution from 200–341 keVee (270ps vs. 340ps FWHM), slightly poorer depth-of-interaction resolution, poorer PSD performance, and higher neutron light output than the stilbene bars. The low cost, ease of manufacturing, brightness, and excellent time resolution make OGS a strong candidate for use in compact radiation imaging systems.



中文翻译:

带双端读数的有机玻璃闪烁棒

有机玻璃闪烁体 (OGS) 棒(6 × 6 × 50 mm3) 是熔铸的,并通过硅光电倍增管阵列的双端读出进行表征。将结果与相同尺寸的反式二苯乙烯皂条进行比较。通过137 Cs 康普顿符合实验测量能量分辨率。时间分辨率是通过22 Na 巧合计时实验确定的。通过沿条的长轴移动伽马射线扇形束来测量相互作用深度分辨率。脉冲形状鉴别能力和中子光输出是通过252 Cf 源的飞行时间测量确定的。OGS 条在 478 keV (10.3±0.5% 对比 11.2±0.5%),更好的时间分辨率从 200–341 keVee (270ps 对比 340psFWHM)、交互深度分辨率稍差、PSD 性能更差、中子光输出比二苯乙烯条更高。低成本、易于制造、亮度和出色的时间分辨率使 OGS 成为用于紧凑型辐射成像系统的有力候选者。

更新日期:2021-08-07
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