ESTIMATION OF COLLECTIVE EFFECTIVE DOSE DUE TO NATURAL BACKGROUND-RADIATION IN EGYPT

被引：2

作者：

HENAISH, BA ^{[1
]}

TAWFIK, AA ^{[1
]}

ZAID, HA ^{[1
]}

GOMAA, MA ^{[1
]}

机构：

[1] AIN SHAMS UNIV,UNIV COLL WOMEN,DEPT PHYS,CAIRO,EGYPT

来源：

RADIATION PHYSICS AND CHEMISTRY | 1994年 / 44卷 / 1-2期

关键词：

D O I：

10.1016/0969-806X(94)90126-0

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

During the last few years, worldwide attention has been directed towards the estimation of natural background radiation levels. Several environmental monitoring networks have been established for systematic data collection and exchange of information. In the Present study, measurements of annual effective dose from terrestrial gamma-rays are carried out at pre-selected sites within several Egyptian governorates by using a calibrated gas-filled GM-detector connected to a microcomputer system. Contribution of the secondary cosmic-rays, which is of prime importance at sea level, is achieved by carrying out computation based on theoretical considerations. Terrestrial effective dose in Egypt is found to be between 106 and 371 mugSv/yr, meanwhile the computed cosmic rays contribution is 260-296 muSv/yr. Accordingly, the annual collective effective dose due to natural background radiation is about 27,253 Man Sv for the last Egyptian population count (1989) considering 0.8 and 0.2 indoor and outdoor occupancy factors.

引用

页码：177 / 180

页数：4

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