RELATIVE BIOLOGICAL EFFECTIVENESS OF LOW-ENERGY PHOTON
This work is to review the literature of data concerning RBE of low-energy photons. The other goal of this work is the computational calculation and modeling of photon propagation through biological tis- sues with Monte-Carlo method and investigation of dependence of the number of ionization acts on pri- mary radiation energy. The hypothesis is checked, if there is a linear dependence between the number of acts of ionization within a selected volume and the dose acquired in that volume. This hypothesis is not valid in the range of energies from 1–100 keV. This fact can explain substantial deviation of the val- ues of RBE shown in experiment from the unity. The high sensitivity of the average number of ionization acts per acquired dose to the energy of the primary beam explain the wide range of experimental meas- ures of RBE. RBE is shown to be highly sensitive to the X-ray spectrum.