Proton lateral broadening distribution comparisons between GRNTRN, MCNPX, and laboratory beam measurements

Details Proton lateral broadening distribution comparisons between GRNTRN, MCNPX, and laboratory beam measurements Proton lateral broadening distribution comparisons between GRNTRN, MCNPX, and laboratory beam measurements

Apr 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010adspr..45..884m&link_type=abstract

Advances in Space Research, Volume 45, Issue 7, p. 884-891.

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Recent developments in NASA’s deterministic High charge (Z) and Energy TRaNsport (HZETRN) code have included lateral broadening of primary ion beams due to small-angle multiple Coulomb scattering, and coupling of the ion-nuclear scattering interactions with energy loss and straggling. This new version of HZETRN is based on Green function methods, called GRNTRN, and is suitable for modeling transport with both space environment and laboratory boundary conditions. Multiple scattering processes are a necessary extension to GRNTRN in order to accurately model ion beam experiments, to simulate the physical and biological-effective radiation dose, and to develop new methods and strategies for light-ion radiation therapy. In this paper we compare GRNTRN simulations of proton lateral broadening distributions with beam measurements taken at Loma Linda University Proton Therapy Facility. The simulated and measured lateral broadening distributions are compared for a 250 MeV proton beam on aluminum, polyethylene, polystyrene, bone substitute, iron, and lead target materials. The GRNTRN results are also compared to simulations from the Monte Carlo MCNPX code for the same projectile-target combinations described above.

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