Assessment of the radiation tolerance of LaBr3:Ce scintillators to solar proton events

Owens, A.; Bos, A.J.J.; Brandenburg, S.; Buis, E. J.; Dathy, C.; Dorenbos, P.; Eijk, C.W.E. van; Kraft, Stefan; Ostendorf, Reint; Ouspenski, V.; Quarati, F.

doi:10.1016/j.nima.2006.12.008

Cited by 38 publications

(27 citation statements)

References 3 publications

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“…R ECENT advances in scintillator technology, such as the availability of LaBr3:Ce [1] (hereafter LaBr3), have opened up a wide range of exciting new possibilities for high-energy astronomy and space science (e.g., [2]- [4]). LaBr3 offers an energy resolution that is competitive with that of semiconductor detectors while retaining the many strengths of scintillators: simple and reliable implementation, high stopping power, large volume, room temperature operation, and very fast timing.…”

Section: Introductionmentioning

confidence: 99%

Silicon photo-multiplier readouts for scintillators in high-energy astronomy

Bloser

Legere

Bancroft

et al. 2008

2008 IEEE Nuclear Science Symposium Conference Record

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New scintillator materials have recently been shown to hold great potential for low-eost, reliable gamma-ray detectors in high-energy astronomy. New devices for the detection of scintillation light promise to make scintillator-based instruments even more attractive by reducing mass and power requirements. In particular, silicon photo-multipliers (SiPMs) are starting to become commercially available that otTer gains and quantum efficiencies similar to those of photo-multiplier tubes (PMTs), but with greatly reduced mass, high ruggedness, low voltage requirements, and no sensitivity to magnetic fields. We have conducted laboratory tests of a sample of commercially available SiPMs coupled to LaBr3:Ce, a scintillator of relevance to future high-energy astrophysics missions. We present results for gamma-ray spectroscopy, compare the SiPM performance to that of a PMT, and discuss the extent to which SiPMs otTer significant advantages for scintillator-based space missions.

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Section: Introductionmentioning

confidence: 99%

Silicon photo-multiplier readouts for scintillators in high-energy astronomy

Bloser

Legere

Bancroft

et al. 2008

2008 IEEE Nuclear Science Symposium Conference Record

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“…4 A 100 ps coincidence resolving time (CRT) for 511 keV annihilation photon pairs was achieved with a LaBr 3 :Ce scintillator in combination with silicon photomultipliers (SiPM). 5 The high c-ray detection efficiency and excellent energy resolution in combination with sufficient radiation tolerance 6 qualified LaBr 3 :Ce for the European Space Agency Japan Aerospace Exploration Agency (ESA/JAXA) BepiColombo mission to Mercury. 7 LaBr 3 :Ce is a mechanically robust scintillation material with remarkable light yield at high temperatures, thus a good candidate for online logging in drill heads for oil well prospection.…”

mentioning

confidence: 99%

Improvement of LaBr3:5%Ce scintillation properties by Li+, Na+, Mg2+, Ca2+, Sr2+, and Ba2+ co-doping

Alekhin

Biner

Krämer

et al. 2013

Journal of Applied Physics

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This paper reports on the effects of Li þ , Na þ , Mg 2þ , Ca 2þ , Sr 2þ , and Ba 2þ co-doping on the scintillation properties of LaBr 3 :5%Ce 3þ . Pulse-height spectra of various gamma and X-ray sources with energies from 8 keV to 1.33 MeV were measured from which the values of light yield and energy resolution were derived. Sr 2þ and Ca 2þ co-doped crystals showed excellent energy resolution as compared to standard LaBr 3 :Ce. The proportionality of the scintillation response to gamma and X-rays of Ca 2þ , Sr 2þ , and Ba 2þ co-doped samples also considerably improves. The effects of the co-dopants on emission spectra, decay time, and temperature stability of the light yield were studied. Multiple thermoluminescence glow peaks, decrease of the light yield at temperatures below 295 K, and additional long scintillation decay components were observed and related to charge carrier traps appearing in LaBr 3 :Ce 3þ with Ca 2þ , Sr 2þ , and Ba 2þ co-doping.

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“…The assessment and the measurement results have been reported in detail in ref. [3]. It is noted that the irradiations had almost no effect on the spectrometric performance of the crystals.…”

Section: Radiation Hardnessmentioning

confidence: 94%

Development and Characterization of Large La-Halide Gamma-Ray Scintillators for Future Planetary Missions

Kraft

Maddox

Buis

et al. 2006

2006 IEEE Nuclear Science Symposium Conference Record

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Future planetary missions such as BepiColombo are resource limited in both mass and power. Due to the vicinity of the spacecraft to the Sun, the instrumentation will face harsh environments as far as radiation levels and thermal loads are concerned. Only radiation hard detectors that need no or little cooling will be able to successfully operate after long cruise times and during the expected mission life times. The next generation of Lanthanum Halide (LaX) scintillators promises to provide sufficient resolution in the spectral range between 1 and 10 MeV where most of the elemental gamma-ray emission lines can be detected. In order to be suitable for planetary gamma-ray spectrometers with sufficient sensitivity it had to be proven that larger crystals of size 3" can be produced and that they maintain their resolution of -3% at 662 keV. For that purpose we have produced and characterized several larger LaBr crystals and assessed their radiation hardness by exposure of the crystals to radiation doses that are representative to the expected conditions in space environment. Systematic measurements on several crystals allowed the determination of the activation potential and the performance verifications from which consequences for instrument flight performance can be derived. From these investigations we conclude that these scintillators are well suited for planetary missions with stable and excellent performance.

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Assessment of the radiation tolerance of LaBr3:Ce scintillators to solar proton events

Cited by 38 publications

References 3 publications

Silicon photo-multiplier readouts for scintillators in high-energy astronomy

Silicon photo-multiplier readouts for scintillators in high-energy astronomy

Improvement of LaBr3:5%Ce scintillation properties by Li+, Na+, Mg2+, Ca2+, Sr2+, and Ba2+ co-doping

Development and Characterization of Large La-Halide Gamma-Ray Scintillators for Future Planetary Missions

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