Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10729855 | Applied Radiation and Isotopes | 2005 | 4 Pages |
Abstract
Medical accelerators with photon energies over 10Â MeV generate an undesired fast neutron contamination in the therapeutic beam. In this work, the Monte Carlo code MCNP was used to simulate the transport of these photoneutrons across the head of various medical accelerators of high energy. The average and most probable neutron energies were obtained from these spectra, before and after crossing the accelerator shielding. The degradation of these spectra, when they cross concrete barriers with thickness which vary between 25 and 100Â cm, was also studied.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Radiation
Authors
A. Facure, R.C. Falcão, A.X. Silva, V.R. Crispim, J.C. Vitorelli,