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Slichter, C.P. Henry, Charles Howard 2011-05-19T18:05:37Z 2011-05-19T18:05:37Z 10000-01-01 1965 "A theoretical analysis is made of the effect of an external perturbation"" such as an electric field or magnetic field, on the optical properties of color centerso The analysis is restricted to centers with orbital singlet ground states.. It is especially applicable to centers with orbitally degenerate excited states which are interacting strongly with the lattice» such as the F center in the alkali halides.. The changes in the optical properties are described by computing the changes that occur in the moments of the optical absorption line shape when the external perturbation is appliedo The changes in the zeroth,\) firstj) second» and third moments may be computed quite simply., Although this does not give the detailed change in the line shape, it pro= videa a precise method for evaluating parameters of the center1 such as the spin-orbit coupling constant of the excited state of the F centere The method of moments is used to analyze experiments on the circular dichroism, Faraday rotation, Stark effect, and Voigt effect of the F center, and the circular dichroism of the A center. The analysis of circular dichroism data yields for the first time a method for determining the separate contributions to the broadening of the F band due to the cubic vibrational modes, the non-cubic vibrational modes,\) and the spin-orbit interaction. The data of Margerie and Romestain on the circular dichroism of the F band in CsBr and CsCl are analyzed.. The analysis resolves the discrepancy between their two methods of determining the spin=orbit splitting (measurement of the peak separation of the resolved structure and measurement of the circular dichroism)~ and shows that the structure arises from a combination of a large spin=orbit coupling and a large non=cubic lattice vibrational interaction." Submitted by Carolyn Mead (cmead2@illinois.edu) on 2011-05-19T18:05:37Z No. of bitstreams: 1 1965_henry.pdf: 5762802 bytes, checksum: 277dfe4884f8a040c9a2fc701b5a017e (MD5) Made available in DSpace on 2011-05-19T18:05:37Z (GMT). No. of bitstreams: 1 1965_henry.pdf: 5762802 bytes, checksum: 277dfe4884f8a040c9a2fc701b5a017e (MD5) Previous issue date: 1965 Item marked as restricted to the 'UIUC Users [automated]' Group (id=2) by Carolyn Mead (cmead2@illinois.edu) on 2011-05-19T18:05:37Z Item is restricted indefinitely. Restriction data tranferred 2014-07-01T11:15:43-05:00 Original Data Group with Access UIUC Users [automated] Release Date: none Reason: Thesis Thesis U of I Only 6189437 http://hdl.handle.net/2142/23974 en 1965 Charles Howard Henry applied fields optical properties color centers alkali halides Effect of applied fields on the optical properties of color centers Dissertation / Thesis text Physics Physics University of Illinois at Urbana-Champaign Dissertation Ph.D.