Natural radioactivity measurements in rock samples of Ondo and Ekiti states in Nigeria

被引：32

作者：

Ajayi, IR ^{[1
]}

Kuforiji, OO ^{[1
]}

机构：

[1] Univ Ibadan, Dept Phys, Fed Radiat Protect Serv, Ibadan, Nigeria

来源：

RADIATION MEASUREMENTS | 2001年 / 33卷 / 01期

关键词：

D O I：

10.1016/S1350-4487(00)00092-5

中图分类号：

TL [原子能技术]; O571 [原子核物理学];

学科分类号：

0827 ; 082701 ;

摘要：

The concentrations of the natural radionuclides namely K-40, Th-232 U-238 in 44 different rock samples around Ondo and Ekiti states have been determined using an Nal (TL) detector coupled to a computerized ACCUSPEC MCA (Multichannel Analyzer) Installation. Gamma spectrometric analyses were performed and the concentrations obtained for each of the radionuclides expressed in Bq kg(-1) are 4.751 +/- 0.091, 13.376 +/- 0.0197, and 3.308 +/- 0.017 for K-40, U-238 and Th-232, respectively. The mean absorbed dose rate is 8.139 +/- 0.427 nGy h(-1) at 1.0 m above the ground level. These results indicate that the radioactivity in these rocks is very low. (C) 2001 Elsevier Science Ltd. All rights reserved.

引用

页码：13 / 16

页数：4

共 8 条

[1]

[Anonymous], 1998, SOURC EFF RISKS ION

[2]

BECK HL, 1992, HASI258

[3]

FARAI IP, 1992, J AFRICA SCI, V15

[4]

*IAEA, 1989, TECHN REP SER IAEA, V295, P11

[5] Assessment of dose rate and collective effective dose equivalent due to terrestrial gamma radiation in the city of Lagos, Nigeria [J].

Jibiri, NN ;

Farai, IP .

RADIATION PROTECTION DOSIMETRY, 1998, 76 (03) :191-194

[6]

MOLLAH AS, 1986, HEALTH PHYS, V50, P849

[7]

UNSCEAR, 1982, SOURC EFF ION RAD

[8]

VOUTILAINEN A, 1988, RADIAT PROT DOSIM, V24, P333

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