Abstract: In a high energy electron accelerator, when high energy electrons inte ract with matter, an electromagnetic shower is induced, producing an induced rad iation field. In this paper, the Monte Carlo method is used to calculate the ind uced radiation of high energy electron accelerator induced by neutron. It is us e ful to establish a waiting time rule. The total cross section of radiation dam ag e of the interaction between the neutron and Fe, Cu and Ni is calculated using t he MSDM code. Distribution of the radioisotope and the production cross sections induced by the interaction of different energy neutron and accelerator are then obtained. A comparison of the results is presented.

Key words: induced radiation, isotope distribution, neutron, MSDM