A new method for high-energy pulsed Gamma measurement within intense background x-rays

作者：Tan Xin Jian; Ouyang Xiao Ping^*; Wang Qun Shu; Song Zhao Hui; Kang Ke Jun; Xia Liang Bin

来源：Chinese Physics B, 2010, 19(1): 010703.

• high energy pulsed Gamma
• background
• scattering
• absorbing

The accelerator-generating 6.13 MeV pulsed Gamma by (19)F(p, alpha gamma)(16)O 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.

• 出版日期2010-1
• 单位西北核技术研究所; 清华大学