تعيين المدى والطاقة المودعة للبروتونات ذات الطاقة (E=50-130 MeV) في النسيج العضوي ودراسة توزع قمة براغ كتابع لسماكة مادة اللكسان Lexan وتعيين ابعاد الساحة الاشعاعية للحزمة باستعمال الكود 2.3.0-MCNPX

Proton facilities represent a major advance in radiation therapy in addition to scanning systems, because of excellent dose distributions around the tumor, and because of potentially lowering whole-body dose compared with conventional radiotherapy methods such as photons. In this paper Monte Carlo Code MCNPX-2.3.0 was used, that has been verified to be a suitable tool to evaluate dose distributions in radiotherapy problems, to calculate the rang and dose distributions in a phantom equivalent to organic tissue with protons energy between (50–130 MeV). Also the effect of the added thickness of Lexan material on change of protons’ range was studied and the field size at the beginning of the phantom was determined.