A highly sensitive γ-radiation dosimeter based on the CeO2 nanowires

Solution of CeO2 nanowires synthesized by a hydrothermal method was investigated for the purpose of developing a new aqueous γ-radiation dosimeter. The solution was exposed to a 137Cs γ-radiation source at a dose rate of 2.4×10−2 μGy/min at room temperature. The aqueous CeO2 nanowire dosimeter exhibited high sensitivity to γ-radiation of dose less than 1000 μGy and a good linearity of response in dose range from 20 to 500 μGy. The nanowires dosimeter may be used as a highly sensitive as well as cost-effective dosimeter in ultra-low-dose environment.