Determination of natural radioactivity in building materials used in the Karachi area by γ-ray spectrometry and INAA

被引：6
|
作者：
Zaidi, JH [1 ]
Arif, M [1 ]
Fatima, I [1 ]
机构：
[1] Pakistan Inst Nucl Sci & Technol, Div Nucl Chem, Islamabad, Pakistan
来源：
RADIOCHIMICA ACTA | 2004年 / 92卷 / 12期
关键词：
natural radioactivity; primordial natural radionuclides; indoor radioactive pollution; gamma-ray spectrometry; INAA;
D O I：
10.1524/ract.92.12.945.55107
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
Samples of sand, stone and manufactured building materials collected from Karachi area have been analyzed for the primordial natural radionuclides U-238, Th-212 and K-40 using gamma-ray spectrometry. The uranium and thorium contents have also been determined by instrumental neutron activation analysis (INAA). The specific activities in these materials, having a radium equivalent activity less than 370 Bq kg(-1), when evaluated for radiological effects show that all materials meet the external gamma-ray dose limitation of 1.5 mSv y(-1). The gamma-ray spectrometric and INAA techniques complemented each other well in this study.
引用
收藏
页码：945 / 949
页数：5
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