Memoirs of the Faculty of Education, Shimane University. Natural science

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Memoirs of the Faculty of Education, Shimane University. Natural science 19
1985-12-25 発行

ハロゲン化アルカリ中の<Sn>^<2+>中心のスペクトルに及ぼす陽イオン空位の影響(I) : 非緩和励起状態

Effect of Cation Vacancy on the Spectra of <Sn>^<2+>-Centers in Alkali Halides(I) : Unrelaxed Excited States
Kamishina, Yoshio
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Experimental results for the temperature-dependence of the second moment of the absorption line shape of the A- and C-bands of Sn^<2+> in KI, KBr, RbBr, and NaCl are explained satisfactorily by a model that includes a tetragonal perturbation of the O_h crystalline field due to a charge-compensating cation vacancy. The strength of the tetfagonal field perturbation is of the same order of magnitude as that of the electron-lattice interaction (dynamical Jahn-Teller effect).