Structure and Properties of A-Centers in KCl

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概要

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• In additively colored KCl crystals containing sodium, irradiation in the F-band causes its complete conversion in two absorption bands which are termed A_1 and A_2. By investigating their thermal, photochernical, and dichroic properties, these two bands are found to arise from a common species of centers called A-centers, and are identified with Petroff's A-and B-bands which have been found in nominally pure specimens. From the analysis of dichroic spectra, peak energy and half-width are determined for each band at several temperatures. The observed oscillator strength is 0.90 for the A_1-band and 0.81 for the A_2-band. The A-centers are destroyed thermally with an activation energy 0.43 eV. A model is proposed for the A-center that it consists of an F-center having a sodium ion as a nearest neighbor to the vacancy. A calculation of energy levels the method of molecular orbitals is presented.

• 社団法人日本物理学会の論文
• 1961-10-05

著者

• Kojima Kazuko

  Department Of Biological Science Tohoku University

• Kojima Tadanobu

  Osaka City University

• NISHIMAKI Noriko

  Department of Physics, Osaka Women's University

• KOJIMA Tadanobu

  Research Institute for Atomic Energy, Osaka City University

• Nishimaki Noriko

  Department Of Physics Osaka Women's University

• Kojima K.

  Department of Nephrology, Fujita Health University

• Kojima K.

  Osaka Women's University

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