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Master's Dissertation
DOI
10.11606/D.54.1979.tde-22042014-093107
Document
Author
Full name
Rafael Henrique Rosales
Institute/School/College
Knowledge Area
Date of Defense
Published
São Carlos, 1979
Supervisor
Committee
Souza, Milton Ferreira de (President)
Li, Maximo Siu
Silva, Jose Roberto Goncalves da
Title in Portuguese
Dicroísmo ótico induzido por campo elétrico em NaCl Pb++
Keywords in Portuguese
Absorção ótica
Dicroísmo ótico
Momento dipolar
Abstract in Portuguese
Usando-se a técnica de dicroísmo ótico induzido sobre a banda de absorção ótica em 272m devido o íon Pb++ em NaCl estabelecemos a simetria desse defeito. O momento dipolar com a vacância na posição 110 foi de 3.65 e Å. Usando-se a mesma técnica além de I.T.C. conseguimos a reorientação dipolar do dipolo I.V. na temperatura de 77°K. Essa relaxação é atribuída ao fato do íon Pb++ estar em estado eletrônico excitado.
Title in English
Optic dichroism induced by electric field in NaCl Pb++
Keywords in English
Dipole moment
Optic dichroism
Optical absorption
Abstract in English
Using the electric induced dichroism effect on the optical absorption band at 272m due to the Pb++ ion in NaCl, the symmetry of I.V. dipole was discussed. The electric dipole moment for the vacancy in the (110) position was measured and found to be 3.65 Å. Using the same technique and I.T.C. measurements we found reorientation in temperatures as low as 77°K. This relaxation is attributed to be I.V. dipole with the Pb++ ion in an electronic excited state.
 
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Publishing Date
2014-04-24
 
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