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Recombination lifetimes of LiF:Mg,Cu,P for pulsed optically stimulated luminescence

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  • Jacob Søgaard Nyemann
  • ,
  • Peter Balling
  • Eduardo G. Yukihara, Paul Scherrer Institute, Switzerland

The well-known thermoluminescent material LiF:Mg,Cu,P (MCP) was previously shown to emit significant optically stimulated luminescence (OSL). In this paper, we investigate the rate of OSL recombination processes in MCP, expressed as effective lifetimes, using time-correlated single photon counting, in this context often referred to as time-resolved pulsed OSL. The recombination luminescence fell into two categories: (i) a dominant fast decaying luminescence described by the two lifetimes τ 1=22.8(1.7)μs and τ 2=60(5)μs and (ii) a slowly decaying part with indeterminate decay profile at a comparatively low signal level (we denote this as “offset luminescence”). The fast recombination channels corresponding to τ 1 and τ 2 are responsible for 71% of the total luminescence observed during test measurements. The luminescence associated with τ 1 dominate the beginning of an experiment, but is depleted much quicker than the luminescence associated with τ 2. We show that all recombination channels show similar response to preheating of the sample, which suggests that they are associated with the same trapping centers.

Original languageEnglish
Article number117924
JournalJournal of Luminescence
Volume234
ISSN0022-2313
DOIs
Publication statusPublished - Jun 2021

    Research areas

  • LiF:Mg,Cu,P, Lifetime, Luminescence, OSL, Recombination, Time-resolved

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