Measurement of Terrestrial Gamma Radiation Level and Annual Effective Dose in and Around NuggihalliHolenarasipura Schist Belts, Karnataka State, India

Niranjan R S; Ningappa C; Nandakumar V; Harshavardhana C N

doi:10.34293/sijash.v8iS1-Feb.3939

Niranjan R S Department of Physics, Government First Grade College for Women Holenarasipura, Hassan Districk, India
Ningappa C Department of Physics Vidya Vikas Institute of Engineering and Techlnology, Mysore, India
Nandakumar V Department of Physics Government First Grade College for Women Holenarasipura, Hassan Districk, India
Harshavardhana C N Department of Mathematics Government First Grade College for Women Holenarasipura, Hassan Districk, India

DOI: https://doi.org/10.34293/sijash.v8iS1-Feb.3939

Keywords: Annual effective dose, Radiation dosimeter, Terrestrial gamma radiation, Nuggihalli-Holenarasipura schist belts

Abstract

All individual living beings on the earth are exposed continuously to the radiations coming from terrestrial and extraterrestrial sources and also from their own bodies. The indoor and outdoor ambient gamma radiations are measured in and around Nuggihalli- Holenarasipura schist belts of Hassan district in Karnataka state. The measurements are carried out using the environment radiation dosimeter UR 705 which is a portable detector. Absorbed dose rate and annual effective dose rate are estimated by measuring the exposure rate. The total annual effective dose calculated from both indoor and outdoor varies from 0.68 to1.62 mSv.y-1 with an average value of 1.16 mSv.y-1. The calculated indoor and outdoor annual effective doses are found to be higher than the world average.