A Note on the Lifetime of the Excited F Center in KCl

Tomura, Masao; Kitada, Tadayoshi; Honda, Shinya

doi:10.1143/jpsj.23.454

Cited by 20 publications

(1 citation statement)

References 5 publications

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“…This electron-phonon coupling produces a broadening of the absorption bands, as well as possible mixing of the electronic states via Jahn-Teller effects. 3 The spin-orbit coupling in Fcenters, and the similar FH(OH ) defect pair, has been measured, and found to be significant, ' ' ' and is therefore included in our analysis.…”

Section: A Interactionsmentioning

confidence: 99%

Absorption-line-shape model forF-center–CN−-molecule defect pairs in CsCl

West

Tsen²,

Lin

1994

Phys. Rev. B

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A systematic study of the temperature-dependent absorption spectra of Fz (CN ) defect pairs in a CsC1 host crystal is presented. At the lowest temperatures, two distinct absorption peaks are observed.As the temperature is increased, the separation of the peaks decreases, the relative oscillator strengths change, and the peaks broaden. These experimental results are explained by a simple model which considers that the nearly degenerate 2s and 2p, electronic states of the Fcenter are strongly mixed by the intrinsic and displacement dipole moments of the CN molecule. From this study, one obtains important parameters such as coupling constants, effective phonon mode frequencies participating in the absorption process, and a parameter describing the degree of 2s-2p, mixing, which are crucial for testing the physical models proposed for the electronic to vibrational energy-transfer process in this defect system.

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Section: A Interactionsmentioning

confidence: 99%

Absorption-line-shape model forF-center–CN−-molecule defect pairs in CsCl

West

Tsen²,

Lin

1994

Phys. Rev. B

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Empirical Relationships for the Emission Energies and Lifetimes of the F‐Center

Gilbert

1968

Physica Status Solidi (b)

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Empirical relations for the emission energies E of the F-center in the Na, K, Rb, and Cs halides, and for the lifetimes T have been established with the following forms:where KO is the optical dielectric constant. Two different relations appear to exist for r. One follows from measurements of z a t liquid helium temperature, the other follows from t extrapolated from measurements above liquid nitrogen temperature with the SwankBrown curve. The implications of the existence of these curves are discussed. Dabei ist KO die optische Dielektrizitiitskonstante. Es scheinen zwei verschiedene Beziehungen fur T zu bestehen: Die eine ergibt sich aus Messungen bei der Temperatur des flussigen Heliums, die andere gilt fur die Werte von t, die man aus den bei der Temperatur des flussigen Stickstoffs und dariiber gemessenen Werten durch Extrapolation der SwankBrown-Kurven erhiilt. Eine Interpretation der gefundenen Beziehungen wird versucht. Zwischen den Emissionsenergien

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A contribution to the discussion on the relaxed excited F centre

Bosi¹,

Cova²,

Spinolo³

1975

Physica Status Solidi (b)

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An interpretation is given of the behaviour of the relaxed excited F centre in ternis of a hydrogenic model with broad wave functions. I n particular the dependence is considered of the lifetime T on the host crystalline matrix a t a fixed low temperature, and on the temperature T for a given matrix. Precision experimental data are given for t ( T ) in KaCI, RbCl, and KBr.On discute l'interpr6tation du comportement de 1'6tat excite relax6 du centre F par nn model hydrogenique avec des fonctions d'onde diffusbes. On considere en particulier la d6pen-dance du temps'de vie T de la matrice crystalline, t i temperature tres baisse constante, et de la temperature T dans une matrice crystalline donnee. On reporte des donnees experimentaux de haut precision pour t ( T ) en Pu'aC1, RbCl ct KBr.

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A Note on the Lifetime of the Excited F Center in KCl

Cited by 20 publications

References 5 publications

Absorption-line-shape model forF-center–CN−-molecule defect pairs in CsCl

Absorption-line-shape model forF-center–CN−-molecule defect pairs in CsCl

Empirical Relationships for the Emission Energies and Lifetimes of the F‐Center

A contribution to the discussion on the relaxed excited F centre

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