Development and calibration of a real-time airborne radioactivity monitor using direct gamma-ray spectrometry with two scintillation detectors

被引：25

作者：

Casanovas, R. ^{[1
]}

Morant, J. J. ^{[2
]}

Salvado, M. ^{[1
]}

机构：

[1] Univ Rovira & Virgili, Unitat Fis Med, Fac Med & Ciencies Salut, ES-43201 Tarragona, Spain

[2] Univ Rovira & Virgili, Serv Proteccio Radiol, Serv Recursos Cient & Tecn, ES-43007 Tarragona, Spain

来源：

APPLIED RADIATION AND ISOTOPES | 2014年 / 89卷

关键词：

Scintillation gamma-ray spectrometry; NaI(TI); LaBr3(Ce); Monte Carlo simulation; Efficiency calculation; NAI(TL);

D O I：

10.1016/j.apradiso.2014.01.026

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The implementation of in-situ gamma-ray spectrometry in an automatic real-time environmental radiation surveillance network can help to identify and characterize abnormal radioactivity increases quickly. For this reason, a Real-time Airborne Radioactivity Monitor using direct gamma-ray spectrometry with two scintillation detectors (RARM-D2) was developed. The two scintillation detectors in the RARM-D2 are strategically shielded with Pb to permit the separate measurement of the airborne isotopes with respect to the deposited isotopes.In this paper, we describe the main aspects of the development and calibration of the RARM-D2 when using NaI(TI) or LaBr3(Ce) detectors. The calibration of the monitor was performed experimentally with the exception of the efficiency curve, which was set using Monte Carlo (MC) simulations with the EGS5 code system. Prior to setting the efficiency curve, the effect of the radioactive source term size on the efficiency calculations was studied for the gamma-rays from Cs-137. Finally, to study the measurement capabilities of the RARM-D2, the minimum detectable activity concentrations for I-131 and Cs-137 were calculated for typical spectra at different integration times. (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：102 / 108

页数：7

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