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

Alekhin, Mikhail S.; Biner, Daniel; Krämer, Karl; Dorenbos, Pieter (2013). Improvement of LaBr3:5%Ce scintillation properties by Li+, Na+, Mg2+, Ca2+, Sr2+, and Ba2+ co-doping. Journal of applied physics, 113(22), 224904-1-224904-7. Melville, N.Y.: American Institute of Physics 10.1063/1.4810848

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This paper reports on the effects of Li+, Na+, Mg2+, Ca2+, Sr2+, and Ba2+ co-doping on the
scintillation properties of LaBr3:5%Ce3+. 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. Sr2+ and Ca2+ co-doped crystals showed excellent energy
resolution as compared to standard LaBr3:Ce. The proportionality of the scintillation response to
gamma and X-rays of Ca2+, Sr2+, and Ba2+ 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 LaBr3:Ce3+ with Ca2+, Sr2+, and Ba2+ co-doping.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Department of Chemistry, Biochemistry and Pharmaceutical Sciences (DCBP)

UniBE Contributor:

Biner, Daniel and Krämer, Karl

Subjects:

500 Science > 530 Physics
500 Science > 540 Chemistry

ISSN:

0021-8979

Publisher:

American Institute of Physics

Language:

English

Submitter:

Karl Krämer

Date Deposited:

16 Dec 2013 16:43

Last Modified:

12 Nov 2019 14:21

Publisher DOI:

10.1063/1.4810848

BORIS DOI:

10.7892/boris.39108

URI:

https://boris.unibe.ch/id/eprint/39108

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