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Waveform digitizing for LaBr_3/NaI phoswich detector

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Chinese Physics C 2014年第8期38卷 64-67页

作者：佘睿季建峰冯骅李红韩冬 Department of Engineering Physics Tsinghua University Key Laboratory of Particle & Radiation Imaging (Tsinghua University) Ministry of Education

The detection efficiency of phoswich detector starts to decrease when Compton scattering becomes significant. Events with energy deposit in both scintillators, if not rejected, are not useful for spectral analysis as the full energy of the incident photon cannot be reconstructed with conventional readout. We show that once the system response is carefully calibrated, the full energy of those double deposit events can be reconstructed using a waveform digitizer as the readout. Our experiment suggests that the efficiency of a photopeak at 662 keV can be increased by a factor of 2 using our LaBr3/NaI phoswich detector.

关键词： X-ray detector phoswich LaBr3 waveform digitizing

用于测量放射性气溶胶β射线的phoswich探测器的蒙特卡罗模拟

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核技术 2011年第8期34卷 594-598页

作者：孙发力夏晓彬张志宏吕晓雯中国科学院上海应用物理研究所上海201800 中国科学院研究生院北京100049

描述了用于β放射性气溶胶放射性活度测量的phoswich探测器的蒙特卡罗模拟。phoswich探测器由塑料闪烁体和BGO无机闪烁体组成,应用Geant4蒙特卡罗程序,对不同入射粒子在塑料闪烁体和BGO内的能量沉积与衰减特性进行了数值模拟计算,去除... 详细信息

描述了用于β放射性气溶胶放射性活度测量的phoswich探测器的蒙特卡罗模拟。phoswich探测器由塑料闪烁体和BGO无机闪烁体组成,应用Geant4蒙特卡罗程序,对不同入射粒子在塑料闪烁体和BGO内的能量沉积与衰减特性进行了数值模拟计算,去除α射线和γ光子的影响后,得到能用于放射性气溶胶的β放射性活度测量的phoswich探测器主要部件的结构和尺寸。

关键词： Geant4 放射性气溶胶射程塑料闪烁体 BGO phoswich

SVOM gamma ray monitor

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Science China(Physics,Mechanics & Astronomy) 2010年第S1期53卷 40-42页

作者： DONG YongWei,WU BoBing,LI YanGuo,ZHANG YongJie & ZHANG ShuangNan Key Laboratory of Particle Astrophysics,Institute of High Energy Physics,Chinese Academy of Sciences,Beijing 100049,China Key Laboratory of Particle Astrophysics Institute of High Energy Physics Chinese Academy of Sciences Beijing China

The space-based multi-band astronomical Variable Object Monitor(SVOM) mission is dedicated to the detection,localization and broad-band study of gamma-ray bursts(GRBs) and other high-energy transient *** gamma ray monitor(GRM) onboard is designed to observe GRBs up to 5 *** this instrument,one of the key GRB parameters,Epeak,can be easily measured in the hard X-ray *** can achieve a detection rate of 100 GRBs per year which ensures the scientific output of SVOM.

关键词： gamma-ray burst Epeak triple phoswich