RADIATION TRANSPORT IN A RADIOTHERAPY ROOM

The photoneutron dose equivalent in a linac radiotherapy room and its entrance maze was investigated by means of Monte Carlo simulations und er different conditions. Particularly, the effect of neutron absorbers and moderator layers placed on the maze walls was considered. The con tribution of prompt gamma rays emitted in absorption reactions of ther mal neutrons was also taken into account. The simulation results are c ompared with some experimental measurements in the therapy room and in the maze.