A thermal-neutron detector with a phoswich system of LiCaAlF6 and BGO crystal scintillators onboard PoGOLite

IEEE Nuclear Science Symposuim & Medical Imaging Conference Pub Date : 2010-12-01 DOI:10.1109/NSSMIC.2010.5873712

H. Takahashi, M. Yonetani, M. Matsuoka, T. Mizuno, Y. Fukazawa, T. Yanagida, Y. Fujimoto, Y. Yokota, A. Yoshikawa, N. Kawaguchi, S. Ishizu, K. Fukuda, T. Suyama, K. Watanabe, H. Tajima, Y. Kanai, N. Kawai, J. Kataoka, J. Katsuta, T. Takahashi, S. Gunji, M. Axelsson, M. Jackson, M. Kiss, W. Klamra, M. Kole, S. Larsson, P. Mallol, M. Pearce, F. Ryde, S. Rydstrom, G. Olofsson, H. Floren, T. Kamae, G. Madejski, G. Varner

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引用次数: 11

Abstract

To measure the flux of atmospheric neutrons and study the neutron contribution to the background of the main detector of the PoGOLite (Polarized Gamma-ray Observer) balloon-borne experiment, a thermal-neutron detector with a phoswich system of LiCaAlF6 (Eu) and BGO crystal scintillators is developed. The performance to separate thermal-neutron events from those of gamma-rays and charged particles is validated with 252Cf on ground. The detector is attached to the PoGOLite instrument and is launched in 2011 from the Esrange facility in the North of Sweden. Although the emission wavelength of the LiCaAlF6 (Ce) is ∼ 300 nm and overlaps with the absorption wavelength of the BGO, the phoswich capability of the LiCaAlF6 (Ce) with the BGO is also confirmed with installing a waveform shifter.

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在PoGOLite上采用LiCaAlF6和BGO晶体闪烁体的光导系统的热中子探测器

为了测量大气中子通量，研究极化伽玛射线观测者(PoGOLite)气球载实验主探测器的中子对背景的贡献，研制了一种由LiCaAlF6 (Eu)和BGO晶体闪烁体组成的热中子探测器。在地面上用252Cf验证了热中子事件与伽马射线和带电粒子分离的性能。该探测器与PoGOLite仪器相连，于2011年从瑞典北部的Esrange设施发射。虽然LiCaAlF6 (Ce)的发射波长为~ 300 nm，并且与BGO的吸收波长重叠，但通过安装波形移位器也证实了LiCaAlF6 (Ce)与BGO的光交换能力。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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IEEE Nuclear Science Symposuim & Medical Imaging Conference

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