G(Fe3+) values in the FBX dosimeter at low dose-rates

Abstract

Radiolytic oxidation of ferrous ions was studied in the FBX dosimetry system at extremely low dose-rates using ⁶⁰Co γ rays and ²¹⁰Po α particles. At high dose-rates, though the system is independent of the dose-rate, the G(Fe³⁺) value increases by about 50% at 0.1 cGy/h, for γ rays. It is about 150 times larger for α particles in the range of 0.1–0.7 cGy/h.