Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 562018
Title Energy levels in YPO4:Ce3+,Sm3+ studied by thermally and optically stimulated luminescence
Author(s) Bos, Adrie J.J.; Poolton, Nigel R.J.; Wallinga, Jakob; Bessire, Aurélie; Dorenbos, Pieter
Source Radiation Measurements 45 (2010)3-6. - ISSN 1350-4487 - p. 343 - 346.
Publication type Refereed Article in a scientific journal
Publication year 2010
Keyword(s) OSL excitation - Sm - Thermally assisted tunnelling - Thermoluminescence - TL - YPO:Ce, Sm

Energy-resolved optically stimulated luminescence (OSL) spectra and thermoluminescence (TL) glow curves of a powder sample of YPO 4:Ce3+,Sm3+ were measured to investigate the nature of the trapping centre and to locate its energy level relative to the valence and conduction bands of the YPO4 host. The high-temperature glow peak could unequivocally be assigned to Sm2+ (thus Sm 3+ acts as an electron trap). The trap depth of this centre, as derived from the OSL excitation spectra, is in good agreement with the Dorenbos model prediction. The OSL excitation spectra also reveal excited states of Sm2+ well below the conduction band. These excited states produce a broadening of the high-temperature TL glow peak and also cause the activation energy determined by the Hoogenstraten method to underestimate the trap depth.

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