An evaluation of the level of naturally occurring radioactive material in soil samples along the Chao Phraya river basin

被引：6
作者：
Santawamaitre, T. [1 ]
Regan, P. H. [1 ]
Bradley, D. A. [1 ]
Matthews, M. [2 ]
Malain, D. [1 ]
Al-Sulaiti, H. A. [1 ]
机构：
[1] Univ Surrey, Dept Phys, Ctr Nucl & Radiat Phys, Guildford GU2 7XH, Surrey, England
[2] Univ Surrey, Dept Civil Engn, Ctr Environm Hlth Engn, Guildford GU2 7XH, Surrey, England
来源：
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT | 2010年 / 619卷 / 1-3期
关键词：
Gamma spectrometry; Soil; Naturally occurring radionuclides; Hyper-pure Germanium detector; RADIONUCLIDES; FOODSTUFFS; RADIATION;
D O I：
10.1016/j.nima.2009.10.177
中图分类号：
TH7 [仪器、仪表];
学科分类号：
0804 ; 080401 ; 081102 ;
摘要：
The aim of this study was to evaluate the level of natural radioactivity in river sediments and riverbank surface soils collected along the Chao Phraya River and its tributaries in Thailand. The activity concentrations of radionuclides in U-238 and Th-232 decay chains as well as K-40 in all samples have been determined by means of a gamma-ray spectrometry system using a hyper-pure germanium detector in a low background configuration. The ranges of specific activity for Ra-226, Th-232 and K-40 were found to be 15.2-67.0, 16.8-73.3 and 204.6-656.5 Bq kg(-1), respectively. Additionally, evaluations have been made of the absorbed gamma dose rate in air and the annual effective dose equivalent from outdoor terrestrial gamma radiation in order to assess any excess radiological risk from agricultural usage of fertilizers. In this study, the absorbed dose rate was observed to vary from 30.5 to 102.6 nGy h(-1) and the outdoor annual effective dose equivalent to range from 37.4 to 125.8 mu Sv yr(-1). (C) 2009 Elsevier B.V. All rights reserved.
引用
收藏
页码：453 / 456
页数：4
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