Minimum detectable activity concentration of radio-cesium by a LaBr3(Ce) detector for in situ measurements on the ground-surface and in boreholes

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Minimum detectable activity concentration of radio-cesium by a LaBr3(Ce) detector for in situ measurements on the ground-surface and in boreholes. / Hasan, Moudud; Rutten, Jos; Camps, Johan; Huysmans, Marijke.

In: Applied Radiation and Isotopes, Vol. 185, 110247, 16.04.2022, p. 1-10.

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@article{e2b02175affd42259d28b19a1edc0cf8,
title = "Minimum detectable activity concentration of radio-cesium by a LaBr3(Ce) detector for in situ measurements on the ground-surface and in boreholes",
abstract = "A 3.81 × 3.81 cm LaBr3(Ce) detector based portable measurement setup has been developed for in situ gamma spectrometric survey of a contaminated site. This system is suitable for above- and below ground surface gamma spectrometric measurements of 137Cs. However, the minimum detectable activity concentration (MDAC), an important parameter of a measurement system, should be estimated for planning purposes of the gamma spectrometric survey. In this study, the MDAC of 137Cs for the measurement setup was investigated. The efficiency of the measurement setups was calculated from Monte Carlo simulations using MCNP code. The numerical model of the different studied set-ups, used in MCNP, performed well for the known cases. The results show that the MDAC varies with the position of the detector with respect to ground surface. A 5–20 min acquisition time, depending on the detector position, can be sufficient to get a MDAC of about 10% of the exemption limit of 137Cs (100 Bq/kg).",
keywords = "MCNP, Gamma spectrometry, Site characterization, Radioactivity",
author = "Moudud Hasan and Jos Rutten and Johan Camps and Marijke Huysmans",
note = "Score=10",
year = "2022",
month = apr,
day = "16",
doi = "10.1016/j.apradiso.2022.110247",
language = "English",
volume = "185",
pages = "1--10",
journal = "Applied Radiation and Isotopes",
issn = "0969-8043",
publisher = "Elsevier",

}

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TY - JOUR

T1 - Minimum detectable activity concentration of radio-cesium by a LaBr3(Ce) detector for in situ measurements on the ground-surface and in boreholes

AU - Hasan, Moudud

AU - Rutten, Jos

AU - Camps, Johan

AU - Huysmans, Marijke

N1 - Score=10

PY - 2022/4/16

Y1 - 2022/4/16

N2 - A 3.81 × 3.81 cm LaBr3(Ce) detector based portable measurement setup has been developed for in situ gamma spectrometric survey of a contaminated site. This system is suitable for above- and below ground surface gamma spectrometric measurements of 137Cs. However, the minimum detectable activity concentration (MDAC), an important parameter of a measurement system, should be estimated for planning purposes of the gamma spectrometric survey. In this study, the MDAC of 137Cs for the measurement setup was investigated. The efficiency of the measurement setups was calculated from Monte Carlo simulations using MCNP code. The numerical model of the different studied set-ups, used in MCNP, performed well for the known cases. The results show that the MDAC varies with the position of the detector with respect to ground surface. A 5–20 min acquisition time, depending on the detector position, can be sufficient to get a MDAC of about 10% of the exemption limit of 137Cs (100 Bq/kg).

AB - A 3.81 × 3.81 cm LaBr3(Ce) detector based portable measurement setup has been developed for in situ gamma spectrometric survey of a contaminated site. This system is suitable for above- and below ground surface gamma spectrometric measurements of 137Cs. However, the minimum detectable activity concentration (MDAC), an important parameter of a measurement system, should be estimated for planning purposes of the gamma spectrometric survey. In this study, the MDAC of 137Cs for the measurement setup was investigated. The efficiency of the measurement setups was calculated from Monte Carlo simulations using MCNP code. The numerical model of the different studied set-ups, used in MCNP, performed well for the known cases. The results show that the MDAC varies with the position of the detector with respect to ground surface. A 5–20 min acquisition time, depending on the detector position, can be sufficient to get a MDAC of about 10% of the exemption limit of 137Cs (100 Bq/kg).

KW - MCNP

KW - Gamma spectrometry

KW - Site characterization

KW - Radioactivity

UR - https://ecm.sckcen.be/OTCS/llisapi.dll/open/48855517

U2 - 10.1016/j.apradiso.2022.110247

DO - 10.1016/j.apradiso.2022.110247

M3 - Article

VL - 185

SP - 1

EP - 10

JO - Applied Radiation and Isotopes

JF - Applied Radiation and Isotopes

SN - 0969-8043

M1 - 110247

ER -

ID: 7523797