Study of natural radionuclide and absorbed gamma dose in Ukhimath area of Garhwal Himalaya, India

Radiat Prot Dosimetry. 2012 Nov;152(1-3):58-61. doi: 10.1093/rpd/ncs187. Epub 2012 Aug 19.

Abstract

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.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Background Radiation*
  • Environmental Monitoring / methods
  • Gamma Rays
  • Humans
  • India
  • Potassium Radioisotopes / analysis
  • Radiation Dosage*
  • Radiation Monitoring / methods*
  • Radioisotopes / analysis*
  • Radium / analysis
  • Soil
  • Soil Pollutants, Radioactive / analysis*
  • Solubility
  • Spectrometry, Gamma
  • Thorium / analysis

Substances

  • Potassium Radioisotopes
  • Radioisotopes
  • Soil
  • Soil Pollutants, Radioactive
  • Thorium
  • Radium