# Nuclear Science and Techniques

《核技术》(英文版) ISSN 1001-8042 CN 31-1559/TL     2019 Impact factor 1.556

Nuclear Science and Techniques ›› 2018, Vol. 29 ›› Issue (2): 23

• LOW ENERGY ACCELERATOR, RAY AND APPLICATIONS •

### Energy distributions of multiple backscattered photons in materials

Asuman Aydın

1. Department of Physics, Faculty of Arts and Sciences, Bal?kesir University, Cagis Campus, 10145 Bal?kesir, Turkey
• Contact: Asuman Ayd?n E-mail:aydina@balikesir.edu.tr
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Asuman Aydın. Energy distributions of multiple backscattered photons in materials.Nuclear Science and Techniques, 2018, 29(2): 23

Abstract:

Backscattering of gamma photons from a material is of fundamental importance in radiation shielding, industrial and medical applications, radiation dosimetry, and non-destructive testing. In Compton scattering, incident photons undergo multiple scatterings within the material (target) before exiting. Gamma photons continue to soften in energy as the number of scatterings increases in a thick target; in other words, the energy of gamma photons decreases as the scatterings increase in case of a thick target and results in the generation of singly and multiply scattered events. In this work, the energy distribution of backscattered gamma photons with backscattering intensity and energy probabilities were calculated by using the Monte Carlo method for metallic, biological, and shielding materials with various thicknesses of slab geometry. The materials under study were targeted with gamma photons of 0.279, 0.662, 1.250, and 2.100 MeV energies. In addition, the energy distributions of multiply scattered gamma photons were studied for materials with infinite geometry. The results are presented and discussed in detail by comparing with other Monte Carlo calculations.