Comparison of environmental gamma radiation of Kerman province and indoor gamma dose rate in Kerman city using thermoluminescent dosimeter (TLD) and RDS-110

AUTHORS

Mohammadtaghi Bahreyni Toosi 1 , Ali Jomehzadeh 2 , *

1 Associate Professor, Department of Biophysics, Mashhad University of Medical Sciences, Mashhad, Iran.

2 Instructor, Department of Paramedical, Hormozgan University of Medical Sciences, Bandar Abbas, Iran.

How to Cite: Bahreyni Toosi M, Jomehzadeh A. Comparison of environmental gamma radiation of Kerman province and indoor gamma dose rate in Kerman city using thermoluminescent dosimeter (TLD) and RDS-110, Hormozgan Med J. 2005 ; 9(3):e90378.

ARTICLE INFORMATION

Hormozgan Medical Journal: 9 (3); e90378
Published Online: July 06, 2005
Article Type: Research Article
Received: January 23, 2005
Accepted: July 06, 2005

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Abstract

Introduction: It is important to measure background radiation, because human
beings are always exposed to environmental radiation. These ionizing radiations
leave energy when striking human body and this energy when imparted is
harmful for body tissues. In this study, environmental gamma radiation (outdoor
measurements) of Kerman towns and indoor gamma dose rate in Kerman by
thermoluminescent dosimeter (TLD) and RDS-110 surveymeter were measured.
Methods: Equipments used in this study Experimental include: 1. A survey meter
(RDS-110). 2. TLD-100 H (Lif:Mg,Cu,P) dosimeters. 3. TLD-Reader 3500
made by Harshaw, USA.
In order to determine outdoor dose rate, four stations along with four main
geographical directions and one station in town centers were selected. Indoor
measurements in Kerman were carried out inside 20 dwellings by both TLD and
RDS-110.
Results: Our results indicate that on average, Bardsir has the highest outdoor
background radiation in the province (1.03±0.32mSv/y) and Kahnooj has the
lowest outdoor background radiation (0.61±0.30mSv/y).
The average indoor dose rate measured by TLD and RDS-110 in Kerman
dwellings were not equal and the difference of averages is equal to 12%.
Conclusion: According to the above results, the annual dose rate of Kerman,
Zarand, Baft, Shahrbabak, Sirjan, Bardsir, Rafsanjan, Bam and Jiroft are higher
than the corresponding values for a normal area.

Keywords

Radiation – Radiation Dosage – Environment – Environmental Exposure – Gamma Rays

© 2005, Hormozgan Medical Journal. This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/) which permits copy and redistribute the material just in noncommercial usages, provided the original work is properly cited.

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