Set up of a gamma spectrometry mobile unit equipped with LaBr3(Ce) detectors for radioactivity monitoring

Prieto, Elena; Jabaloyas, E.; Casanovas, R.; Rovira, C.; Salvadó, M.

doi:10.1016/j.radphyschem.2019.108600

Cited by 6 publications

(4 citation statements)

References 7 publications

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“…Examples of ground-based mobile detection systems: (a) Car-borne survey with two LaBr 3 mounted in the roof. Reproduced, with permission, from Reference [124]; published by Elsevier, 2020, under the terms of the https://creativecommons.org/licenses/by/4.0/CC BY 4.0 license. (b) Van with a dose rate counter (top) and a NaI(Tl) spectrometer (bottom).…”

Section: Ground Surveymentioning

confidence: 99%

“…The detection systems used vary from scintillation detectors NaI(Tl) and CsI(Tl), HPGe and Silicon Semiconductor Detectors. Recently, Prieto et al [ 124 ] used two LaBr 3 mounted in the car roof pointing out to each side ( Figure 6 a) for routine and emergency monitoring of large areas (mapping and plume tracking). To reduce the gamma-rays attenuation by the car structure, the detectors can be positioned outside the width of the car.…”

Section: Mobile Radiation Detection Systemsmentioning

confidence: 99%

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State-of-the-Art Mobile Radiation Detection Systems for Different Scenarios

Marques

Vale

Vaz

2021

Sensors

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In the last decade, the development of more compact and lightweight radiation detection systems led to their application in handheld and small unmanned systems, particularly air-based platforms. Examples of improvements are: the use of silicon photomultiplier-based scintillators, new scintillating crystals, compact dual-mode detectors (gamma/neutron), data fusion, mobile sensor networks, cooperative detection and search. Gamma cameras and dual-particle cameras are increasingly being used for source location. This study reviews and discusses the research advancements in the field of gamma-ray and neutron measurements using mobile radiation detection systems since the Fukushima nuclear accident. Four scenarios are considered: radiological and nuclear accidents and emergencies; illicit traffic of special nuclear materials and radioactive materials; nuclear, accelerator, targets, and irradiation facilities; and naturally occurring radioactive materials monitoring-related activities. The work presented in this paper aims to: compile and review information on the radiation detection systems, contextual sensors and platforms used for each scenario; assess their advantages and limitations, looking prospectively to new research and challenges in the field; and support the decision making of national radioprotection agencies and response teams in respect to adequate detection system for each scenario. For that, an extensive literature review was conducted.

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Section: Ground Surveymentioning

confidence: 99%

Section: Mobile Radiation Detection Systemsmentioning

confidence: 99%

State-of-the-Art Mobile Radiation Detection Systems for Different Scenarios

Marques

Vale

Vaz

2021

Sensors

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“…The LaBr 3 (Ce) scintillation counter, which has been widely used in regional geophysical exploration, radiation environment monitoring, nuclear medicine, astrophysical measurement and other fields, has the advantages of high resolution and high detection efficiency [1][2][3][4][5][6]. However, the intrinsic radioactivity background of the LaBr 3 (Ce) scintillation counter limits its application [7][8][9][10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

“…List of partial γ and α energies of the γ + α spectrum, the signature probabilities calculated according to Refs. 1-20, Qα energy and the half-lifes of 227 Ac and its daughters[1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20].…”

mentioning

confidence: 99%

Study on the γ + X, γ + β, γ + α Coincidence Summing Effects of the Intrinsic Background Instrument Spectrum of a LaBr3(Ce) Scintillation Counter

Sun

et al. 2020

J. Korean Phys. Soc.

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The energy resolution of a LaBr3(Ce) scintillation counter can reach 2.7% (662 keV) at room temperature. As a radiation measuring device, it has remarkably good characteristics. However, the LaBr3(Ce) crystal has its own intrinsic radioactivity background, which mainly comes from 138 La and from 227 Ac and its daughters. 138 La can emit β, γ and X-rays through β and γ decay; 227 Ac and its daughters can emit α, β and γ-rays through α, β and γ decay. α, γ and X-ray energy are characteristic while β-ray energy is continuous. The energy of α, β and X-rays is mainly deposited in the crystal unless the α, β and X-rays at the edge of the crystal can escape from the crystal. Therefore, the α, β, γ and X-rays generated by the intrinsic radioactivity of the crystal are superimposed on the instrument spectrum, which makes the instrument spectrum more complicated and produces the coincidence summing effects of γ + X, γ + β and γ + α. In this research, the GEANT4.9.5 software package was used to simulate the spectra of α, β, γ and X-rays. On the basis of a combination of fitting decomposition and reconstruction, the simulation spectrum of the LaBr3(Ce) self-radioactive background was obtained accurately and was verified by using physical experiments.

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