Standardisation of Radiation Measuring Devices Using Ambient Dose Equivalent for Radiation Protection in Bangladesh

ASM Sc. J., 20(2), 2025

Published on December 8, 2025

https://doi.org/10.32802/asmscj.2025.1501

Author: Zohora Akther Mitu, Santunu Purohit, Tanjim Siddiqua, Md. Shakilur Rahman, AKM Moinul Haque Meaze

Abstract

For the purpose of human life, radiation is used, however unselective application of it may serve as a hazard to life. One of the preventive actions is the proper use of calibrated dose as well as dosimeters in order to monitor the harmful impact on healthy cells. The dosemetry of 137Cs, 60Co sources from gamma calibrator GC-60, G-10 and X-ray narrow series qualities (N-40, N-60, N-80, N-100, N-120, N-150, N-200) was performed in SSDL, Bangladesh with standard ionisation chambers of model NE-2575#386 (600cc) and PTW32002 (1000cc) according to the recommended protocol of IAEA SRS 16 and ISO 4037. In this study, it is found that larger volumes have less uncertainty than smaller volumes for the low dose ionisation sources. For Cs-137 20 mCi activity both of our chambers measure very close ambient dose equivalent H*(10) rather than other. The ambient dose equivalent H*(10) can be used for the implementation of new ICRU operational unit as a radiation safety.

Keywords: Ambient dose equivalent, International Code of Radiological Unit, International Organization for Standardization (ISO) 4037, Radiation protection, Safety Report Series (SRS) 16