Improvement of γ-ray energy resolution of LaBr3:Ce3+ scintillation detectors by Sr2+ and Ca2+ co-doping

Alekhin, M. S.; de Haas, J. T. M.; Khodyuk, I. V.; Krämer, Karl W.; Menge, P. R.; Ouspenski, V.; Dorenbos, P. (2013). Improvement of γ-ray energy resolution of LaBr3:Ce3+ scintillation detectors by Sr2+ and Ca2+ co-doping. Applied physics letters, 102(16), pp. 161915-1. Melville, N.Y.: American Institute of Physics 10.1063/1.4803440

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Commercially available LaBr3:5% Ce3+ scintillators show with photomultiplier tube readout about 2.7% energy resolution for the detection of 662 keV γ-rays. Here we will show that by co-doping LaBr3:Ce3+ with Sr2+ or Ca2+ the resolution is improved to 2.0%. Such an improvement is attributed to a strong reduction of the scintillation light losses that are due to radiationless recombination of free electrons and holes during the earliest stages (1–10 ps) inside the high free charge carrier density parts of the ionization track.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Departement of Chemistry and Biochemistry

UniBE Contributor:

Krämer, Karl

Subjects:

500 Science > 530 Physics
500 Science > 540 Chemistry

ISSN:

0003-6951

Publisher:

American Institute of Physics

Language:

English

Submitter:

Karl Krämer

Date Deposited:

16 Dec 2013 16:45

Last Modified:

05 Dec 2014 02:24

Publisher DOI:

10.1063/1.4803440

BORIS DOI:

10.7892/boris.39107

URI:

https://boris.unibe.ch/id/eprint/39107

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