Optical Behavior of V Centers in KI Crystals at Low Temperatures

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概要

• 論文の詳細を見る

• Photochemical conversion and reorientation of V centers in Kl crystals coloredadditively or electrolytically are studied at temperatures of 19 -140 K. When Vcenters are dissociated at 19 K by irradiation with light in the 270 urn region,Ii-like centers are formed. The Iz -like centers bexin to bleach at about 40 Kforming centers of another type which possess (J IQ) symmetry and give rise toabsorption bands with peaks at 358, 430, 625 and 808 urn. The V. and V3 bandsobserved in quenched crystals are composed of absorption bands due to twokinds of V centers with (110) and (111) symmetries. Besides these centers,other V centers with (100) or near-<( 110) symmetry are also formed by opticalexcitation; after the optical excitation, dipoles of I/centers reorient into proper di-rections at a xiven temr>erature of the samr>Ie. Based on the model of the [3molecule-ton bound to a cation vacancy, possible structures of the four kinds ofV centers are discussed.

• 社団法人日本物理学会の論文
• 1981-02-15

著者

• Okada Takeyuki

  Faculty Of Engineering Setsunan University

関連論文

• Optical Behavior of V Centers in KI Crystals at Low Temperatures
• V Centers in KI Crystals Containing Excess Iodine
• Optical Bleaching of V_2 and V_3 Bands in KI Crystals at 19 K

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