Study of natural radionuclide and absorbed gamma dose in Ukhimath area of Garhwal Himalaya, India.
Natural radiation is the largest contributor to the collective radiation dose of the world population. It is widely distributed in different geological formations such as soil, rocks, air and groundwater. In the present investigation, (226)Ra, (232)Th and (40)K were measured in soil samples of the Ukhimath region of Garhwal Himalaya, India using NaI(Tl) gamma-ray spectrometry. The activity concentrations of naturally occurring radionuclides (226)Ra, (232)Th and (40)K were found to vary from 38.4 ± 6.1 to 141.7 ± 11.9 Bq kg(-1) with an average of 80.5 Bq kg(-1), 57.0 ± 7.5 to 155.9 ± 12.4 Bq kg(-1) with an average of 118.9 Bq kg(-1) and 9.0 ± 3.0 to 672.8 ± 25.9 Bq kg(-1) with an average of 341 Bq kg(-1), respectively. The total absorbed gamma dose rate varies from 70.4 to 169.1 nGy h(-1) with an average of 123.4 nGy h(-1). This study is important to generate a baseline data of radiation exposure in the area. Health hazard effects due to natural radiation exposure are discussed in details.
Department of Physics, HNB Garhwal University, Badshahi Thaul Campus, Tehri Garhwal 249199, India.
B S
BS
Rautela
M
M
Yadav
A A
AA
Bourai
V
V
Joshi
G S
GS
Gusain
R C
RC
Ramola
D001417:Background Radiation; D004784:Environmental Monitoring / Q000379:methods; D005720:Gamma Rays; D006801:Humans; D007194:India; D011197:Potassium Radioisotopes / Q000032:analysis; D011829:Radiation Dosage; D011834:Radiation Monitoring / Q000379:methods*; D011868:Radioisotopes / Q000032:analysis*; D011883:Radium / Q000032:analysis; D012987:Soil; D012990:Soil Pollutants, Radioactive / Q000032:analysis*; D012995:Solubility; D013051:Spectrometry, Gamma; D013910:Thorium / Q000032:analysis
D011197:Potassium Radioisotopes; D011868:Radioisotopes; D012987:Soil; D012990:Soil Pollutants, Radioactive; D013910:Thorium; D011883:Radium