“…on Moon or Mars missions, is even greater. The interactions of neutrons are of also of great importance, especially in LEO, and estimates of the neutron contribution to an astronaut's total dose equivalent inside a spacecraft at LEO range from 30 to 60% [1]- [3]. To investigate the radiation-shielding qualities of proposed vehicle models and to simulate the radiation environment, as well as to estimate the biological effects of cosmic radiation, e.g.…”