CeBr$_{3}$ Scintillator Development for Possible Use in Space Missions

Drozdowski, Winicjusz; Dorenbos, P.; Bos, A.J.J.; Bizarri, Grégory; Owens, A.; Quarati, F.

doi:10.1109/tns.2007.908579

Cited by 66 publications

(33 citation statements)

References 16 publications

(23 reference statements)

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“…The YOBr: Ce 3+ and LuOBr: Ce 3+ materials display reduced intensities in their high energy peaks and slower decay components. These features suggest reabsorption processes similar to those reported in CeBr 3 and BaF 2 : Ce 3+ [35] and [36]. For all samples shown in Fig.…”

Section: +supporting

confidence: 82%

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: +supporting

confidence: 82%

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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“…15,16 In recent years, CeBr 3 scintillators with high energy resolution (4.0% at 662 keV) and fast timing resolution of 119 ps with a self-activity much lower than the LaBr 3 :Ce scintillator have also been developed. [17][18][19] However, the characteristics of CeBr 3 scintillators are slightly inferior to LaBr 3 :Ce scintillators at present. Yet, self-activity of LaBr 3 :Ce crystals is considered to be a serious defect in LaBr 3 :Ce scintillators.…”

Section: Introductionmentioning

confidence: 88%

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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“…[9,10]. Research has been reported in which a cerium bromide detector was exposed to a 60 Co irradiator, in which the photoelectron yield dropped only by 8% after 111 kGy dose [11]. This surpasses the requirement of surviving to a total dose of 10 kGy.…”

Section: Avexis Systemmentioning

confidence: 99%

On the design of a remotely-deployed detection system for reactor assessment at Fukushima Daiichi

Jones

Griffiths

Joyce

et al. 2016

2016 IEEE Nuclear Science Symposium, Medical Imaging Conference and Room-Temperature Semiconductor Detector Workshop (NSS/MIC/R

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-The premise behind this research is the design of a system that will allow fuel debris characterisation at Fukushima Daiichi. The precise location of the debris is not known for example as to whether it remains within the reactor pressure vessel or it has leaked through into the base of the pedestal below, additionally the state of the fuel is also in question as to whether this has corroded from within its encasing or if it is intact. The most likely scenario is a combination of all four of these situations. The flooding of the reactor floors immediately following the Fukushima accident adds an extra element of complexity for the detection system requiring it to be submersible and to hold any detector system in water tight confinement. The research carried out has involved extensive modifications to a previously-designed low-cost small-scale AVEXIS submersible inspection vehicle and the incorporation of a variety of radiation detectors. The latter has been designed to allow for mapping and determination of the situation that is present within the primary containment vessels. The challenges addressed with the detection system arise from the high dose rates that have been recorded around the reactor pressure vessels which can be as high as 1000 Gy/hr. In such a harsh environment not only will the radiation detectors struggle to operate but the components that make up the remote-operated vehicle are also likely to suffer radiation damage after only a relatively short period of time. The research presented here evaluates the components currently incorporated into the AVEXIS system in terms of their radiation tolerability as well as presenting the combination of detectors to be used in the remote probe for the investigation of the fuel debris.

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CeBr$_{3}$ Scintillator Development for Possible Use in Space Missions

Cited by 66 publications

References 16 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)

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

On the design of a remotely-deployed detection system for reactor assessment at Fukushima Daiichi

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