应用MORSE程序计算中子的天空反散射

用中子源模拟粒子加速器，以MORSE程序分析计算由于天空反散射引起的中子剂量当量的变化规律，揭示了天空反散射的实质，计算结果可供加速器或核设施环境评价和防护设计使用．计算模型采用将中子源置于空心圆柱体中，圆柱体分为有顶盖屏蔽和无顶盖屏蔽两种情况．中子源能量分别为2.38MeV、14Mev和巨共振中子．中子源为各向同性．此外，还分析计算了不同的发射立体角和不同散射介质的影响．

Use of MORSE Program to Calculate Skyshine

The neutron dose equivalent produced by skyshine was calculated using MORSE program. For these calculations, the neutron sourse was enclosed in a hollow concrete cylinder. There were two cases, one was the cylinder with concrete roof shielding, the other was without a roof. The sourse energies of 2.38 MeV, 14 MeV and giant resonance (G. R) neutron were calculated separately. We have compared the effects of different models, such as different sourse emission solid angle and different scattering media. The results can be applied for the estimation of radiological impact to invironment and the design of radiation protection on the particle accelerators and other nuclear facilities.