Formation of V_k Centers in Alkali Iodides and Bromides Containing MnO_4^- or MnO_4^<2-> Ions under UV-Light Excitation

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概要

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• Optical absorption spectra of Rbl, RbBr and KBr crystals containing Mn0j orMnO: ions and effects of the ur-light irradiation on these crystals have been in-vestigated. Several absorption bands and some vibronic structures are observed in thevisible and uv regions. Assignments of electronic transitions are given to these absorp-lion bands. Depending upon the formation process of Mn0: ions, absorption spec-Era due to these ions show some differences, which are interpreted by location ofanuon vacancies near MnO 'I. ions. Formation of V. centers by the zvz;-light irradiationat low temperature is confirmed in the quenched Rbl:MnO' and in the Rbl:Mn0j ,RbBr:MnO.- and KBr:Mn0.- . The L.-center formation is explained by an intra-molecular charge-transfer transition in the crystals containing Mn0j ions, and prob-ably by an excitation in the exciton-band tail in the crystals containing MnO: ions.[color center, trapped hole center, V. center, photoexcitation, permanganate, lj manganate, alkali iodide, alkali bromide, charge transfer]

• 1991-02-15

著者

• KAKIGI Shouhei

  Department of Physics,Ritsumeikan University

• Kakigi Shouhei

  Department Of Physics Ritsumeikan University

関連論文

• Formation of V_k Centers in Alkali Iodides and Bromides Containing MnO_4^- or MnO_4^ Ions under UV-Light Excitation
• Luminescence Decay of the V-Type Centers in KI Crystals Containing Divalent Cations
• Three-Body Breakup Reaction in FSI Region
• Optical Properties of KI Crystals Containing MnO^_4 or MnO^-_4 Ions
• Optical Properties of Kl Crystals Containing MnO^2-_4 or MnO^-_4 Ions
• Luminescence of V-Type Centers in Potassium and Rubidium Iodide Crystals
• Luminescence of V-Type Centers in Potassium and Rubidium Iodide Crystals
• V Bands in RbI Crystals Containing Excess Iodine

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