Dosimetry Using a Silicon Diode and an Electrochemical Integrator

Abstract

A diode-dosimeter constructed from a silicon diode and an MD1B2 “Memoriode” (an electrochemical integrator manufactured by Sanyo Electric Corporation) has been tested to use it for ⁶⁰Co gamma rays. In this dosimeter, the diode acts as a radiation-to-current converter and the Memoriode as a current integrator, thus the total exposure being known by the terminal voltage on the Memoriode. The response, i.e. radiation-induced terminal voltage on the Memoriode of the dosimeter as a function of exposure, has shown good linearity within the dose-range of one to two decades for every diode. This dosimeter has been found to be useful for measuring exposures between 260 mC/kg (10³R) and 2.6 kC/kg (10⁷R) by using replacement diodes with different sensitivities.