Journal ArticleDOI
Recombination luminescence in alkali halides
D Pooley,W A Runciman +1 more
TLDR
In this article, a study of x-ray and electron excited luminescence in all alkali halides in the temperature range 4K to 300K is presented, where the lifetime and peak intensities of some bands have been measured as a function of temperature giving parameters characterizing quenching processes.Abstract:
Results are presented of a study of x-ray and electron excited luminescence in all alkali halides in the temperature range 4K to 300K. Details are given of the spectral distribution and lifetimes associated with the luminescence bands at about 5K. The lifetime and peak intensities of some bands have been measured as a function of temperature giving parameters characterizing quenching processes. These parameters confirm that many luminescence transitions are nearly forbidden and that the quenching process involves internal radiationless transitions.read more
Citations
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Journal ArticleDOI
Scintillation and spectroscopy of the pure and Ce3+-doped elpasolites: Cs2LiYX6 (X = Cl, Br)
TL;DR: In this paper, the optical and scintillation properties of pure and Ce3+-doped Cs2LiYX6 (X = Cl, Br) crystals measured from 10 to 300 K are presented.
Journal ArticleDOI
Scintillation and luminescence properties of Ce3+ doped K2LaCl5
TL;DR: In this paper, two models are proposed to explain the energy transfer from the host lattice to the Ce ions in K2LaCl5:Ce3+ with Ce3+ concentrations between 0.001% and 10% are presented.
Journal ArticleDOI
Creation of lattice defects in the bulk and at the surface of alkali halide crystals
TL;DR: In this paper, a conduction electron is recaptured in the coulomb field of a self-trapped hole, and it is strongly attracted to the site of the halogen molecular ion on which the hole resides, and particularly to the alkali neighbors, but not to the Halogen atom core.
Journal ArticleDOI
Formation Time of STE at 1Σ+u State in RbBr and KI under Pulsed Electron Beam in Picosecond Range
TL;DR: In this paper, the growth times (τ g σ ) of the σ emission intensity in RbBr and KI crystals were obtained to be 10±10 ps and 5±5 ps, respectively, under irradiation of a pulsed electron beam with the pulse duration of about 18 ps near liquid helium temperature.
Journal ArticleDOI
Low-temperature excitonic, electron-hole and interstitial-vacancy processes in LiF single crystals
S. Nakonechnyi,Tiit Kärner,Aleksandr Lushchik,Ch. Lushchik,V Babin,Eduard Feldbach,I. Kudryavtseva,P. Liblik,L. A. Pung,Evgeni Vasil'chenko +9 more
TL;DR: In this paper, the emission spectra and the excitation spectra of various emissions have been measured in LiF crystals at 9 K using VUV radiation of 10-33 eV.
References
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Journal ArticleDOI
Proposed Excitonic Mechanism of Color-Center Formation in Alkali Halides
TL;DR: In this article, it is assumed that the progenitor for color center formation is a dissociating (excited) molecule: if this molecule is initially created, or subsequently placed, in an excited vibronic, predissociative, or repulsive state, it may dissociate into a normal halide ion and an uncaged atomic halogen fragment $X$ moving into an interstitial position and leaving behind a vacancy, according to the reaction.
Journal ArticleDOI
Low-Temperature Recombination Luminescence in Alkali Halide Crystals
TL;DR: In this paper, the origin of the recombination luminescence is revealed through these polarization properties, together with results on optical excitation and bleaching spectra, temperature dependence, excitation efficiency, and impurity independence.
Journal ArticleDOI
Relation between Absorption and Emission Probabilities in Luminescent Centers in Ionic Solids
W. Beall Fowler,D. L. Dexter +1 more
TL;DR: In this article, it was pointed out that the Einstein relationship between spontaneous emission probability and induced absorption probability for radiative transitions is not generally valid for impurity centers in condensed media.
Journal ArticleDOI
F-centre production in alkali halides by electron-hole recombination and a subsequent [110] replacement sequence: a discussion of the electron-hole recombination
TL;DR: A model for F-centre production in alkali halides by ionizing radiation is discussed in this article, where the energy required for the formation of the defect is given to an anion in the radiationless recombination of an electron and a hole, which takes place via an exciton state.
Journal ArticleDOI
Absorption Spectra of F - 2 , Cl - 2 , Br - 2 , and I - 2 in the Alkali Halides
TL;DR: In this article, the optical and paramagnetic resonance spectra of crystals containing one of the impurities were analyzed to identify the optical transitions of these centers, and the polarizations and relative intensities of the optical absorptions in the optical absorption in the x-ray irradiation at liquid nitrogen temperature were discussed.
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