RADIOACTIVE ANOMALIES IN A NORTHEASTERN BRAZILIAN TOWN

被引：2

作者：

MALANCA, A ^{[1
]}

ACHILLI, L ^{[1
]}

FABBRI, S ^{[1
]}

机构：

[1] CRR,PMP,SETTORE FIS AMBIENTALE,I-29100 PIACENZA,ITALY

来源：

JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH PART A-ENVIRONMENTAL SCIENCE AND ENGINEERING & TOXIC AND HAZARDOUS SUBSTANCE CONTROL | 1995年 / 30卷 / 05期

关键词：

BUILDING MATERIALS; GAMMA SPECTROMETRY; NATURAL RADIONUCLIDES; RADIOACTIVE ANOMALIES;

D O I：

10.1080/10934529509376245

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The Brazilian town of Santana do Mates is located in a region which is rich in granites and other pre-Cambrian rocks. Radiological measurements performed in 43 dwellings by a hand-held scintillometer, gave a mean value of 148 +/- 44 nGy h(-1). Readings in downtown streets ranged from 200 to 330 nGy h(-1). Several radiocative anomalies with high gamma-background were also located in the surroundings of that town, where a value of 900 nGy h(-1) was recorded in a small cave used as a shelter by some shepherds. Concentrations of naturally occurring radionuclides in seven samples of building materials utilized at Santana do Mates, were determined by a gamma spectrometer. The following mean values were obtained: Ra-226: 40.1 Bq kg(-1); Th-232: 68.8 Bq kg(-1); K-40: 736 Bq kg(-1).

引用

页码：989 / 999

页数：11

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[2]

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[3]

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