Abstract:
This research aims to develop a smartphone based gamma dosemeter. This developed dosemeter has the maximum counting rate of 100 kcps and capable to measure the exposure rate from 0 to 300 mR/hr. The gamma dosemeter compose of five main parts: CsI(Tl) scintillation detector, pluse amplifier circuit, peak detector with sample and hold circuit, pulse height to digital converter with bluetooth circuit and smartphone. From the test results of the exposure rate measurements from a standard Cs-137 gamma-ray source compared to the standard value, the different were found to be within ±7% and the energy spectrum of the gamma rays can be displayed and identified satisfactorily