Regular Article

Monte-Carlo study of the effect of small admixture of iron atoms on the energy absorbed by solid disordered neon irradiated by near-Fe1s-threshold photons

Rostov State Transport University, 2 Narodnogo Opolcheniya, Rostov-na-Donu 344038, Russia

^a e-mail: agk@rgups.ru

Received: 18 April 2018
Received in final form: 16 November 2018
Published online: 17 April 2019

Abstract

Energy absorption processes in iron-doped solid disordered neon under photon irradiation are studied by Monte Carlo simulation with accurate accounting for the processes of the cascade decay of vacancies in the electron shells of ionized atoms. Cascade decay processes of ionized atoms in matter under ionizing radiation are demonstrated to be a crucial factor in the mechanisms of energy absorption in irradiated samples. Small (0.25–4%) admixtures of iron atoms to solid neon samples lead to noticeable enhancement of energy absorption in a sample (1.2–2.7 times) at incident photon energies exceeding Fe1s ionization threshold. Since the neon atom is isoelectronic with H₂O, this effect may well be expected in tissues of organisms under ionizing radiation.