Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8210493 | Applied Radiation and Isotopes | 2013 | 18 Pages |
Abstract
Optimization of the Beam Shaping Assembly (BSA) has been performed using the MCNP4C Monte Carlo code to shape the 2.45Â MeV neutrons that are produced in the D-D neutron generator. Optimal design of the BSA has been chosen by considering in-air figures of merit (FOM) which consists of 70Â cm Fluental as a moderator, 30Â cm Pb as a reflector, 2Â mm 6Li as a thermal neutron filter and 2Â mm Pb as a gamma filter. The neutron beam can be evaluated by in-phantom parameters, from which therapeutic gain can be derived. Direct evaluation of both set of FOMs (in-air and in-phantom) is very time consuming. In this paper a Response Matrix (RM) method has been suggested to reduce the computing time. This method is based on considering the neutron spectrum at the beam exit and calculating contribution of various dose components in phantom to calculate the Response Matrix. Results show good agreement between direct calculation and the RM method.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Radiation
Authors
Y. Kasesaz, H. Khalafi, F. Rahmani,