室温でのKC1結晶におけるM中心の再配向機構

概要

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The　mechanism　for　the　reorientation　of　M　centers　in　KCl　crystals　has　been　studiedby　observing　the　anisotropic　absorption　induced　in　the　crystals,　which　were　irradiated by　polarized　F-or　M-band　light　at　room　temperature.　From　the　initial　change　of absorption　in　the　M　band　measured　with　〔011〕or〔011〕 polarized　light,　it　is considered that　the　reorientation　of　the　M　center　takes　place　as　follows: After　the　excitation with　polarized　M-band　light,　an　M+ center　is　formed　as　an　intermediate　state,　and is　not　separated　into　an　F- and　α-center.　Then,　the　F- or　α-center　portion　of　the M+ center　is　replaced　by　an　adjacent　Cl　ion　successivly　and　the　axis　of　M+ center changes　from　one　of　{011}　to　another　direction. On　capturing　an　electron,　the reorientation　of　the　M　center　completes.
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