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Study of gamma exposure rate in Mysore and Chamaraj Nagar district, Karnataka, India
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K.L. Sriharsha   , M. Raghavayya , N.R. Rajendra Prasad , M.S. Chandrahekara |
| , nrrp@lycos.com |
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Abstract: (16064 Views) |
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Background: Humans beings are continuously
exposed to ionizing radiation from natural sources.
The main contributors to natural radiation are
high-energy cosmic radiation and radioactive
nuclides that originates in the earth’s crust.
Exposure to high levels of radiation can cause
serious health effects. In this study an attempt has
been made to monitor the levels of environmental
background radiation (gamma) in temples, historical
monuments, schools and colleges, hostels, wedding
halls and theaters in Mysore and Chamaraj Nagar
districts and assess the possible effects on environment
and human health. Materials and Methods:
Environmental radiation dosimeter is used to measure
the outdoor and indoor radiation absorbed dose
levels. The measurements were made 1 m above
the ground level. Results: Inside the temples it
varies from 122.7 to 231.4 nGy.h–1 with a median
of 130.1 nGy.h–1 outside the temples it varies from
141.8 to 340.2 nGy.h–1 with a median of 216.2
nGy.h–1. In different types of buildings in indoor
atmosphere it varies from 112.2 to 197.5 nGy.h–1
with a median of 127.0 nGy.h–1 and in outdoor
atmosphere it varies from 140.9 to 298.4 nGy.h–1
with a median of 216.2 nGy.h–1. Conclusion: The
indoor absorbed dose rate is higher than outdoors
in all types of constructions. Indoor and outdoor
environment of the temples has higher levels of
radiation than the historical monuments and other
public and private building in Mysore and Chamaraj
Nagar districts. Use of additional granite materials
inside or outside the building will enhance the
absorbed radiation dose levels. The values observed
in the study area are comparable with other values
observed in different parts of the world. |
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| Keywords: Gamma radiation, dosimeter, Mysore. |
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Full-Text [PDF 294 kb]
(3495 Downloads)
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Type of Study: Original Research |
Subject:
Radiation Biology
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