On line gamma-ray spectrometry at open sea

被引：49

作者：

Tsabaris, C ^{[1
]}

Ballas, D ^{[1
]}

机构：

[1] Hellen Ctr Marine Res, GR-19013 Anavyssos, Greece

来源：

APPLIED RADIATION AND ISOTOPES | 2005年 / 62卷 / 01期

关键词：

radioactivity; underwater sensors; ocean buoys; Aegean Sea;

D O I：

10.1016/j.apradiso.2004.06.007

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Set up and application of a stationary monitoring network for measuring specific gamma- activities in the Aegean Sea are described. Three NaI scintillator based spectrometers have been used to detect the gamma rays. The gross counting rate of each system was found to be nearly constant, when there was no rainfall. The volumetric activity of the natural gamma-ray emitter K-40 in open sea varied from 12,200 to 13,000 Bq/m(3). The counting rate for 1461 keV K-40 radiation was measured by intercalibration with an appropriate salinity sensor mounted close to the NaI-detector system. A simple relation between the counting rate and the salt concentration has been observed. The amount of the artificial radioactivity from Cs-137 was increased up to seven times higher after strong rainfall, compared to the radiation level as given in literature (3.5-5.5 Bq/m(3)), while the Bi-214 counting rate was increased up to ten times compared to the data,without rainfall. (C) 2004 Elsevier Ltd. All rights reserved.

引用

页码：83 / 89

页数：7

共 12 条

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