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GAMMA DOSE RATES IN THE HIGH BACKGROUND RADIATION AREA OF MANGALORE REGION, INDIA.

Darwish Al-Azmi1, Sudeep Kumara2, M P Mohan2

  • 1Department of Applied Sciences, College of Technological Studies, Public Authority for Applied Education and Training, Shuwaikh, P.O. Box 42325, Code, Kuwait.

Radiation Protection Dosimetry
|July 13, 2019
PubMed
Summary
This summary is machine-generated.

Natural background radiation levels near Mangalore, India, were assessed. While most areas showed normal gamma dose rates, some monazite sand locations reached up to 530 nSv/h.

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Area of Science:

  • Environmental Science
  • Radiological Science
  • Geology

Background:

  • Monazite sand deposits in Mangalore, India, are known sources of elevated natural background radiation.
  • Previous studies have indicated the presence of scattered monazite sand patches along the beaches.

Purpose of the Study:

  • To conduct a comparative study of gamma dose rates in normal and high natural background radiation areas around Mangalore.
  • To quantify in situ gamma dose rates and analyze soil and sand samples for radiation levels.

Main Methods:

  • Utilized portable gamma dosimeters for in situ measurements of gamma dose rates.
  • Employed a NaI(Tl) based portable gamma spectrometer for acquiring gamma-ray energy spectra.
  • Conducted laboratory analysis of soil and sand samples using High-Purity Germanium (HPGe) detectors.

Main Results:

  • Gamma dose rates were measured between 2016 and 2018.
  • Most locations exhibited gamma dose rates comparable to normal background levels.
  • Specific sites with monazite sand showed significantly higher dose rates, reaching up to 530 nSv/h.

Conclusions:

  • The study confirms localized areas of high natural background radiation in Mangalore due to monazite sand.
  • Findings highlight the importance of monitoring radiation levels in areas with naturally occurring radioactive materials.
  • Variability in dose rates underscores the need for site-specific radiological assessments.