中国物理B ›› 2010, Vol. 19 ›› Issue (1): 10703-010703.doi: 10.1088/1674-1056/19/1/010703
康克军1, 谭新建2, 欧阳晓平2, 王群书2, 宋朝晖3, 夏良斌3
Tan Xin-Jian(谭新建)a)b), Ouyang Xiao-Ping(欧阳晓平) a)b)†, Wang Qun-Shu(王群书) a)b), Song Zhao-Hui(宋朝晖)b), Kang Ke-Jun(康克军) a), and Xia Liang-Bin(夏良斌)b)
摘要: The accelerator-generating 6.13~MeV pulsed Gamma by 19F(p, αγ )160 reaction usually synchronizes with an intense bremsstrahlung x-ray which has a maximum energy of 1~MeV. This paper proposes a new method, named the scattering and absorbing method, to diagnose the 6.13~MeV Gamma. This method includes two parts: the detector and a scatterer placed in front of the detector. The detector converts the Gamma to electrons and then collects the electrons by a scintillator. In order to restrain the interference of the low-energy background, the scintillator collects the electrons at a small angle. The scintillator is wrapped with electro-absorbing material to absorb the low-energy electrons generated by background x-rays. The theoretical sensitivity ratio of 6.13~MeV Gamma to 1~MeV x-rays is greater than 150. The scatterer is a pretreatment tool to scatter some background x-rays away from the radial beam before they enter the detector. By varying the length, the scatterer can reduce the background x-rays to an acceptable level for the detector.
中图分类号: (X- and γ-ray sources, mirrors, gratings, and detectors)