Performance of large lanthanum bromide scintillators

Menge, P.; Gautier, Gaël; Iltis, Alain; Rozsa, C. M.; Solovyev, V. G.

doi:10.1016/j.nima.2007.04.002

Cited by 114 publications

(51 citation statements)

References 6 publications

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“…Cerium-doped rare earth halides display desirable [1] high scintillation light yields with fast decay components [2], [3], [4], [5], [6], [7], [8], [9], [10] and [11] (e.g., LaBr 3 : Ce 3+ has been reported to have luminosities in the range of 61,000-74,000 phs/MeV and decay times <40 ns , [6] and [10]), and hence they have garnered much attention. Though these halides are attractive scintillators, their hygroscopic nature make them difficult to handle.…”

Section: Introductionmentioning

confidence: 99%

Room-temperature scintillation properties of cerium-doped REOX (RE=Y, La, Gd, and Lu; X=F, Cl, Br, and I)

Eagleman

Bourret-Courchesne

Derenzo

2011

Journal of Luminescence

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The scintillation properties of cerium-doped oxyhalides following the general formula REOX (RE=Y, La, Gd, and Lu; X=F, Cl, Br, and I) are reported. These materials were synthesized under dry conditions as microcrystalline powders from conventional solid state reactions. The room temperature X-ray excited emission and scintillation decay curves were measured and analyzed for each material. Additionally, the hygroscopic nature of the oxychlorides and oxybromides was compared to that of their corresponding rare earth halides. The yttrium, lanthanum, and gadolinium oxychlorides, and all of the oxybromides and oxyiodides are found to be activated by Ce 3+ . GdOBr doped with 0.5% Ce 3+ has the highest light output with a relative luminosity of about one-half that of LaBr 3 : Ce 3+ . It displays a single exponential decay of 30 ns. Research Highlights►Room temperature scintillation properties of cerium doped rare earth oxyhalides. ►Oxybromides and oxyiodides most efficient scintillators. ►Cerium activation may be linked to structure.

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Section: Introductionmentioning

confidence: 99%

Room-temperature scintillation properties of cerium-doped REOX (RE=Y, La, Gd, and Lu; X=F, Cl, Br, and I)

Eagleman

Bourret-Courchesne

Derenzo

2011

Journal of Luminescence

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“…The CeBr 3 detector, which has an energy resolution comparable with that of a LaCl 3 :Ce detector, has an order of magnitude reduced intrinsic activity as compared to the LaBr 3 :Ce and LaCl 3 :Ce detector [9]. Furthermore, the reduced intrinsic activity of the CeBr3 detector has a narrower energy range of 1400-2200 keV [9,12], as compared to 780-2200 keV energy range reported for the intrinsic activity of the LaBr 3 :Ce and LaCl 3 :Ce ( [1,3,7]). These features enable the CeBr 3 detector to provide a larger interference-free energy range for the gamma-ray detection in prompt gamma-ray analysis of bulk samples as compared to the LaBr 3 :Ce and LaCl 3 :Ce detectors.…”

Section: Introductionmentioning

confidence: 95%

“…Moreover, a cylindrical 76 mm × 76 mm (diameter × length) LaCl 3 :Ce or CeBr 3 gamma-ray detector views the sample through the cavity hole at a right angle to the neutron generator axis. The empty polyethylene plastic sample container has a mass of 96 g and a density of 0.92 g/cm 3 . The paraffin and lithium carbonate mixed neutron shield is used to protect the detector against neutrons while lead shielding provides detector protection against gamma rays.…”

Section: Prompt Gamma Spectrum Of Lacl 3 :Ce Detector With Water Samplementioning

confidence: 99%

“…Gamma-ray spectroscopy techniques are continuously progressing due to rapid advances in the development and fabrication of fast and higher light output scintillation materials [1][2][3]. The development of the cerium tribromide (CeBr 3 ) gamma-ray detector among the lanthanum halide detector series (LaBr 3 :Ce and LaCl 3 :Ce detectors) is one such example [4][5][6][7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

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Multiple Gamma-Ray Detection Capability of a CeBr₃ Detector for Gamma Spectroscopy

Naqvi

Khiari

Liadi

et al. 2017

Journal of Spectroscopy

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The newly developed cerium tribromide (CeBr 3 ) detector has reduced intrinsic gamma-ray activity with gamma energy restricted to 1400-2200 keV energy range. This narrower region of background gamma rays allows the CeBr 3 detector to detect more than one gamma ray to analyze the gamma-ray spectrum. Use of multiple gamma-ray intensities in elemental analysis instead of a single one improves the accuracy of the estimated results. Multigamma-ray detection capability of a cylindrical 75 mm × 75 mm (diameter × height) CeBr 3 detector has been tested by analyzing the chlorine concentration in water samples using eight chlorine prompt gamma rays over 517 to 8578 keV energies utilizing a D-D portable neutron generator-based PGNAA setup and measuring the corresponding minimum detection limit (MDC) of chlorine. The measured MDC of chlorine for gamma rays with 517-8578 keV energies varies from 0.07 ± 0.02 wt% to 0.80 ± 0.24. The best value of MDC was measured to be 0.07 ± 0.02 wt% for 788 keV gamma rays. The experimental results are in good agreement with Monte Carlo calculations. The study has shown excellent detection capabilities of the CeBr 3 detector for eight prompt gamma rays over 517-8578 keV energy range without significant background interference.

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“…8 Furthermore, LaBr 3 :Ce scintillators have large stopping power in spite of their relatively lower effective atomic number, since it is possible to make a large crystal with high density (5.3 g/cm 3 ). [9][10][11] They are also suitable for high energy gamma ray measurements (e.g., cosmic ray, characteristic gamma ray due to nuclear reactions 12 and environmental radiation 13 ). Additionally, fluorescence characteristics of LaBr 3 :Ce scintillators have only a small dependency on thermal changes 14 and have strong radiation-resistance.…”

Section: Introductionmentioning

confidence: 99%

Feasibility study on signal separation for spontaneous alpha decay in LaBr3: Ce scintillator by signal peak-to-charge discrimination

Ogawara

Ishikawa

2015

Review of Scientific Instruments

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A novel analysis method named peak-to-charge ratio (Vp/Qtotal) discrimination, aiming at background rejection especially for alpha decay self-activity in LaBr3: Ce scintillators has been developed. This method is based on a waveform analysis using the peak-to-charge ratio in the output waveform of a photomultiplier tube. The discrimination of alpha-induced events was achieved by using a threshold function based on the error propagation of the Vp/Qtotal value. The accidental rejection ratio of gamma-induced events was evaluated to be 0.17%. Furthermore, a total absorption peak spectrum processed with the Vp/Qtotal discrimination method for 68Ga 1.883 MeV gamma rays, where the energy was overlapped with background alpha events, reproduced exactly the same result as that of the background subtraction method. The difference in measured peak counts of both methods was 0.716%, and the statistical error in the Vp/Qtotal discrimination method and background subtraction was 4.81% and 8.70%, respectively. Thus a higher-accuracy measurement could be achieved using the Vp/Qtotal discrimination method. The present study demonstrates that the Vp/Qtotal discrimination method is a promising method for background rejection of the spontaneous alpha decay in LaBr3: Ce scintillators.

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Performance of large lanthanum bromide scintillators

Cited by 114 publications

References 6 publications

Room-temperature scintillation properties of cerium-doped REOX (RE=Y, La, Gd, and Lu; X=F, Cl, Br, and I)

Room-temperature scintillation properties of cerium-doped REOX (RE=Y, La, Gd, and Lu; X=F, Cl, Br, and I)

Multiple Gamma-Ray Detection Capability of a CeBr₃ Detector for Gamma Spectroscopy

Feasibility study on signal separation for spontaneous alpha decay in LaBr3: Ce scintillator by signal peak-to-charge discrimination

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Performance of large lanthanum bromide scintillators

Cited by 114 publications

References 6 publications

Room-temperature scintillation properties of cerium-doped REOX (RE=Y, La, Gd, and Lu; X=F, Cl, Br, and I)

Room-temperature scintillation properties of cerium-doped REOX (RE=Y, La, Gd, and Lu; X=F, Cl, Br, and I)

Multiple Gamma-Ray Detection Capability of a CeBr3 Detector for Gamma Spectroscopy

Feasibility study on signal separation for spontaneous alpha decay in LaBr3: Ce scintillator by signal peak-to-charge discrimination

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Resources

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Multiple Gamma-Ray Detection Capability of a CeBr₃ Detector for Gamma Spectroscopy