Waveform digitizing for LaBr_3/NaI phoswich detector  

作　　者：佘睿 季建峰 冯骅 李红 韩冬 

机构地区：[1]Department of Engineering Physics, Tsinghua University [2]Key Laboratory of Particle & Radiation Imaging (Tsinghua University), Ministry of Education

出　　处：《Chinese Physics C》2014年第8期64-67,共4页中国物理C（英文版）

基　　金：Supported by NSFC(10978001,11222327)

摘　　要：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.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 

分 类 号：O572.212[理学—粒子物理与原子核物理]