【作者】 岳伟明；

【导师】 姚泽恩；

【作者基本信息】 兰州大学 ， 粒子物理与原子核物理， 2008， 硕士

【摘要】 本文首先给出一种氚钛厚靶D-T反应加速器中子源的中子产额、能谱和角分布的计算方法,并开发了相应的计算模拟程序,用自行开发的计算程序计算了入射氘束流能量低于1.0 MeV理想条件下D-T中子源的中子产额、能谱和角分布;其次,根据理想条件下得到的能谱和角分布数据,建立了氚钛厚靶D-T中子源中子发射模型,应用MCNP程序对兰州大学3.3×10¹²n/s强流D-T中子发生器的中子能谱、角分布及n-γ比进行了MonteCarlo模拟,并将模拟结果与实验数据进行了比较,Monte Carlo模拟结果和实验结果能够较好的符合;另外,结合兰州大学新建中子实验大厅建筑结构、材料及实验大厅布局,对实验大厅周围的辐射剂量进行了模拟计算和初步评价。更多还原

【Abstract】 In this paper, firstly, a mathematical method and a computer program were developed to calculate the yield, energy spectrum and angular distribution of neutrons from the T（d,n）⁴He reaction in a thick tritium-titanium （TiT_x） target for all incident deuteron beam energies lower than 1.0MeV. Secondly, the neutron emission model of T（d,n）⁴He reaction neutron source was established based on the data of the neutron energy spectrum and angular distribution, which were get under ideal conditions and mentioned above. The neutron emission model was applied to simulate the neutron energy spectrum, angular distribution and n/γratio of Lanzhou University 3.3×l0¹²n/s intense neutron generator using MCNP code. The M-C simulation results can meet with experimental results well by comparison. Moreover, the radiation dose of neutron andγoutside the neutron experimental hall of Lanzhou University was simulated and evaluated using MCNP code by considering the structure, materials and the layout of the experimental hall.更多还原