Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8039088 | Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms | 2018 | 6 Pages |
Abstract
It is useful to obtain the exact neutron yield and distribution of a portable neutron generator. In this paper, the neutron yield of a K400 accelerator D-D neutron source under conditions of 160â¯kV and 25â¯uA is 1.69â¯Ãâ¯106â¯Â±â¯4.1â¯Ãâ¯104â¯n/s, which is calibrated using the associated proton method. A long counter consisting of a 3He counter surrounded by a paraffin cylinder was used as secondary standard after efficiency calibration using a K400 accelerator. The Monte Carlo method is then used to evaluate the distribution change of emitted neutrons from each surface of the CPDG caused by its structural materials. Energy spectrum distortion and angle distribution distortion of emitted neutrons are studied. Simulation results show that the proportion of the forward neutron is reduced and the proportion of the lateral neutron is increased. The number of neutron transporting into the counter has been reduced by 28.1%, 28.4%, 29.8%, 29.0%, 28.7%, and 28.0% for acceleration voltages of 90â¯kV, 100â¯kV, 110â¯kV, 120â¯kV, 130â¯kV, and 160â¯kV, respectively. In addition, the respective yield correction factors caused by structural materials are 1.36, 1.38, 1.38, 1.34, 1.37, and 1.39. The neutron yield of the CPDG is 1.28â¯Ãâ¯106 and 1.75â¯Ãâ¯106 before and after Monte Carlo correction when working at conditions of 130â¯kV and 600â¯Î¼A. The total uncertainty of this result is approximately 6%.
Related Topics
Physical Sciences and Engineering
Materials Science
Surfaces, Coatings and Films
Authors
Yingzeng Zhang, Jun Zeng, Xiaofeng Guo, Pu Zheng, Gang Li, Yongchun Xiang, Fanhua Hao, Qingpei Xiang,