Evaluation of efficiency for in situ gamma spectrometer based upon cerium-doped lanthanum bromide detector dedicated for environmental radiation monitoring

Ciupek, Krzysztof; Jednoróg, Sławomir; Fujak, M.; Szewczak, Kamil

doi:10.1007/s10967-013-2906-z

Cited by 16 publications

(10 citation statements)

References 5 publications

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“…This energy/efficiency calibration was obtained from mathematical considerations [7]. In general, the detector efficiency (for particular constant energy) is given by [8]: eff = total number of counts observed in full-energy peak total number of photons emitted by the source ð2Þ…”

Section: Methodsmentioning

confidence: 99%

Calibration of the angular energy efficiency of an in situ spectrometer based on a LaBr3(Ce) detector

Jednoróg

Ciupek

Krajewski

et al. 2015

J Radioanal Nucl Chem

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The angular response of an environmental cspectrometer equipped with a LaBr 3 (Ce) detector is characterized. The efficiency calibration was performed via mathematical and experimental methods and yielded threedimensional maps of angle, energy, and efficiency. The applicability and limitation of the mathematical calibration were evaluated by relative uncertainty propagation. The uncertainty is in the range of 65 % for c-rays with energies below 250 keV, up to 35 % in the range 250-550 keV, and approximately 10 % for other energies. These are acceptable levels of accuracy for environmental monitoring.

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Section: Methodsmentioning

confidence: 99%

Calibration of the angular energy efficiency of an in situ spectrometer based on a LaBr3(Ce) detector

Jednoróg

Ciupek

Krajewski

et al. 2015

J Radioanal Nucl Chem

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“…LaBr 3 :Ce has an energy resolution of 2.5-3% at the 662 keV gamma-line of 137 Cs, compared to 6-7% for NaI:Tl (Ciupek et al 2014). These advantages over NaI:Tl have been demonstrated in an experiment, which shows that LaBr 3 :Ce finds more peaks than NaI:Tl, and finds them faster than NaI:Tl (Milbrath et al 2007) .The lack of need for nitrogen cooling also makes LaBr 3 :Ce systems significantly more portable than HPGe.…”

Section: Introductionmentioning

confidence: 97%

“…The efficiency of LaBr 3 :Ce is superior to that of thallium doped sodium-iodide (NaI:Tl) (Saint Gobain). LaBr 3 :Ce has been shown to be 1.2-1.65 times more efficient than NaI:Tl above 350 keV, for 1.5" by 1.5" detectors (Ciupek et al 2014) . The energy resolution of LaBr 3 :Ce is superior to that of NaI:Tl (Saint Gobain, 2016).…”

Section: Introductionmentioning

confidence: 99%

“…There are challenges associated with using LaBr 3 :Ce First, it is not possible to obtain a pure crystal of LaBr 3 :Ce, due to natural abundances of lanthanum containing isotopic impurities of 138 La (Ciupek et al 2014). This means there is an internal radioactivity from 138 La which results in an intrinsic background spectrum that is inherent to this detector type (Saint Gobain, 2016)..…”

Section: Introductionmentioning

confidence: 99%

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Gamma-gamma coincidence performance of LaBr3:Ce scintillation detectors vs HPGe detectors in high count-rate scenarios

Drescher

Yoho

Landsberger

et al. 2017

Applied Radiation and Isotopes

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A radiation detection system consisting of two cerium doped lanthanum bromide (LaBr:Ce) scintillation detectors in a gamma-gamma coincidence configuration has been used to demonstrate the advantages that coincident detection provides relative to a single detector, and the advantages that LaBr:Ce detectors provide relative to high purity germanium (HPGe) detectors. Signal to noise ratios of select photopeak pairs for these detectors have been compared to high-purity germanium (HPGe) detectors in both single and coincident detector configurations in order to quantify the performance of each detector configuration. The efficiency and energy resolution of LaBr:Ce detectors have been determined and compared to HPGe detectors. Coincident gamma-ray pairs from the radionuclides Eu andBa have been identified in a sample that is dominated by Cs. Gamma-gamma coincidence successfully reduced the Compton continuum from the largeCs peak, revealed several coincident gamma energies characteristic of these nuclides, and improved the signal-to-noise ratio relative to single detector measurements. LaBr:Ce detectors performed at count rates multiple times higher than can be achieved with HPGe detectors. The standard background spectrum consisting of peaks associated with transitions within the LaBr:Ce crystal has also been significantly reduced. It is shown that LaBr:Ce detectors have the unique capability to perform gamma-gamma coincidence measurements in very high count rate scenarios, which can potentially benefit nuclear safeguards in situ measurements of spent nuclear fuel.

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“…Also, there is no need for nitrogen cooling and it is easier to be simulated comparing to HPGe detectors. Thus, LaBr3(Ce) detectors could be a suitable choice for environmental radiation monitoring [3] and in-situ measurements of NORM [4].…”

Section: Introductionmentioning

confidence: 99%

Development of a semi-empirical calibration method by using a LaBr3(Ce) scintillation detector for NORM samples analyses

Ntalla¹,

Markopoulos²,

Karfopoulos³

et al. 2021

hnps

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In this study, a semi-empirical calibration method for NORM samples measurement by using a LaBr3(Ce) scintillator was developed based on a combination of experimental gamma spectrometry measurements and MCNP-X simulations. The aim of this work is to provide us with full energy peak efficiency calibration curves in a wide photon energy range which is of particular importance when selected photon energies of 234Th, 214Pb, 214Bi, 228Ac, 208Tl and 226Ra are to be measured with accuracy.

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Evaluation of efficiency for in situ gamma spectrometer based upon cerium-doped lanthanum bromide detector dedicated for environmental radiation monitoring

Cited by 16 publications

References 5 publications

Calibration of the angular energy efficiency of an in situ spectrometer based on a LaBr3(Ce) detector

Calibration of the angular energy efficiency of an in situ spectrometer based on a LaBr3(Ce) detector

Gamma-gamma coincidence performance of LaBr3:Ce scintillation detectors vs HPGe detectors in high count-rate scenarios

Development of a semi-empirical calibration method by using a LaBr3(Ce) scintillation detector for NORM samples analyses

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