Xiangdong Qu
California Institute of Technology
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Featured researches published by Xiangdong Qu.
nuclear science symposium and medical imaging conference | 1999
Xiangdong Qu; Liyuan Zhang; Ren-Yuan Zhu
This paper presents result of a study on undoped as well as various doped lead tungstate crystals. Radiation induced color center density was compared to radioluminescence. Light output degradation for crystals under irradiation was measured. Correlations between variations of crystal transmittance and light output were investigated. Monitoring wavelength was determined so that adequate sensitivity and good linearity may be achieved.
Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment | 2002
Xiangdong Qu; Liyuan Zhang; Ren-Yuan Zhu; Jingying Liao; Dingzhong Shen; Zhiwen Yin
In this paper we present results of a study on the yttrium doping in lead tungstate crystals. The crystal growth by modified Bridgman method is described. Results of trace analysis on raw materials and crystals are presented. The segregation coefficient of yttrium ions in lead tungstate crystals was determined. The scintillation emission and longitudinal transmittance spectra, light output, decay kinetics, light response uniformity and radiation damage were measured. It is found that yttrium doping suppresses slow scintillation component and improves radiation hardness of lead tungstate crystals.
Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment | 2002
Xiangdong Qu; Liyuan Zhang; Ren-Yuan Zhu; Jingying Liao; Dingzhong Shen; Zhiwen Yin
In this paper we present results of a study on the yttrium doping in lead tungstate crystals. The crystal growth by modified Bridgman method is described. Results of trace analysis on raw materials and crystals are presented. The segregation coefficient of yttrium ions in lead tungstate crystals was determined. The scintillation emission and longitudinal transmittance spectra, light output, decay kinetics, light response uniformity and radiation damage were measured. It is found that yttrium doping suppresses slow scintillation component and improves radiation hardness of lead tungstate crystals.
Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment | 2001
Xiangdong Qu; Liyuan Zhang; Ren-Yuan Zhu; Qun Deng; Jingying Liao; Zhiwen Yin
In this paper, we present results of a study on Sb doping in lead tungstate crystals. The crystal growth by modified Bridgman method is described. The segregation coefficient of Sb ions in lead tungstate crystals was determined. The scintillation emission and longitudinal transmittance spectra, light output, decay kinetics and radiation damage were measured. It is found that Sb doping alone is not sufficient to produce radiation hard lead tungstate crystals, and post-growth oxygen compensation is required.
Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment | 2002
Rihua Mao; Xiangdong Qu; Guohao Ren; Dingzhong Shen; S. P. Stoll; C. L. Woody; Zhiwen Yin; Liyuan Zhang; Ren-Yuan Zhu
Archive | 2002
Rihua Mao; Xiangdong Qu; Guohao Ren; Dingzhong Shen; S. P. Stoll; C. L. Woody; Zhiwen Yin; Liyuan Zhang; Ren-Yuan Zhu
Archive | 2002
Xiangdong Qu; Liyuan Zhang; Ren-Yuan Zhu; Qun Deng; Jingying Liao; Zhiwen Yin
Fuel Cells Bulletin | 2001
Rihua Mao; Xiangdong Qu; Guohao Ren; Dingzhong Shen; S. P. Stoll; C. L. Woody; Zhiwen Yin; Liyuan Zhang; Ren-Yuan Zhu
Fuel Cells Bulletin | 2001
Xiangdong Qu; Liyuan Zhang; Ren-Yuan Zhu; Jingying Liao; Dingzhong Shen; Zhiwen Yin
Archive | 1998
Xiangdong Qu; Liyuan Zhang; Ren-Yuan Zhu
