Effect of the radius of the gold nanoparticles on the range of secondary particles has been produced in energy ranges of K and L edges

Nowadays, with the advancement of nano-technology, nanoparticles with high atomic number can be concentrated in tumor cells. The presence of nanoparticles within the tumor causes an increase in the tumor sensitivity to the radiation while healthy tissues nearby get the least damage. In the present study, using the code mcnpx, phantom consisting of a cube with sides of 10 cm containing soft tissue and a tumor with sides of 0.5 cm were considered. In order to investigate the effect of nanoparticles with radius 15, 50 and 100 were used. The results showed that the optimum energy in the presence of nanoparticles with radius 15 and 50