Kinetics decay and electron phototransfer in cerium-doped fluorite

Luminescence decay after excitation by nitrogen laser radiation of Ce 3+-doped calcium fluoride crystal has been investigated. Prolonged afterglow was found to remain for 10 s following short decay of an intra-centre emission. The afterglow spectra were measured. In this case photoconductivity was n...

Full description

Saved in:
Bibliographic Details
Published inNuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment Vol. 486; no. 1; pp. 443 - 447
Main Authors Pologrudov, V.V, Penzina, E.E, Malchukova, E.V
Format Journal Article
LanguageEnglish
Published Elsevier B.V 21.06.2002
Subjects
Afterglow
Electron phototransfer
Luminescence burst
61.72.Ji
Afterglow
Electron phototransfer
Luminescence burst
Online AccessGet full text

Cover

More Information
Summary:Luminescence decay after excitation by nitrogen laser radiation of Ce 3+-doped calcium fluoride crystal has been investigated. Prolonged afterglow was found to remain for 10 s following short decay of an intra-centre emission. The afterglow spectra were measured. In this case photoconductivity was not recorded. The phosphorescence takes place both in oxygen-free and oxygen-containing crystals. Kinetics of afterglow is described by hyperbola with indexes depending on sample preparation conditions, temperature of measurements, and emission wavelength. By irradiation with 2.07 eV (600 nm) light (peak of Ce 2+-ions absorption band) luminescence burst was observed after preliminary nitrogen laser excitation of the crystal. Electron transfer from excited ions Ce 3+ to non-excited ions Ce 3+, which are the capture centres, in the process of photoexcitation could account for observed phenomena. The effect of electron transfer is considered as a result of the electron states overlap of absorptive centres and electron traps.
ISSN:0168-9002
1872-9576
DOI:10.1016/S0168-9002(02)00750-7