2026-09-23T16:00:34Z https://www.ideals.illinois.edu/oai-pmh

oai:www.ideals.illinois.edu:2142/23981 2023-07-10 col_2142_8859 col_2142_5131 com_2142_8858 com_2142_234 com_2142_5130

Compton, W.D. Schnatterly, Stephen Eugene 2011-05-20T15:25:45Z 2011-05-20T15:25:45Z 10000-01-01 1965 The method of moments is used to analyze the effect of applied uniaxial stresses on the optical absorption of alkali halides containing F centers. By measuring the first moment change of the F band due to uniaxial stresses applied in (100) and (1l0) directions,' the coupling of the F center excited state to lattice distortions of tetragonal and trigonal symmetry is evaluated. By measuring the third moment change due to the same ~pplied stresses, the separate contributions to the second moment of the F band of dynamic lattice distortions of tetragonal, trigonal, and breathing symmetries are evaluated. I Measurements of the zeroth moment change due to applied .stresses allow evaluation of the validity of the Condon approximation. Calculations based on three simple models of the K band are compared with the results of a measurement of the change in zeroth and-first moments of the K band produced by applied uniaxial stresses. The temperature dependence of the zeroth and first moments of the K band is calculated for the same three models. The results indicate that the K band is .. not .. due to transitions to a state of even parity. Brief measurements of the stress-induced dichroism in the Vl' R, and M band regions are reported. Submitted by Carolyn Mead (cmead2@illinois.edu) on 2011-05-20T15:25:45Z No. of bitstreams: 1 1965_schnatterly.pdf: 8209634 bytes, checksum: b2cd9f13cc9c47126bf0e00749af1192 (MD5) Made available in DSpace on 2011-05-20T15:25:45Z (GMT). No. of bitstreams: 1 1965_schnatterly.pdf: 8209634 bytes, checksum: b2cd9f13cc9c47126bf0e00749af1192 (MD5) Previous issue date: 1965 Item marked as restricted to the 'UIUC Users [automated]' Group (id=2) by Carolyn Mead (cmead2@illinois.edu) on 2011-05-20T15:25:45Z Item is restricted indefinitely. Restriction data tranferred 2014-07-01T11:13:11-05:00 Original Data Group with Access UIUC Users [automated] Release Date: none Reason: Thesis Thesis U of I Only 6188880 http://hdl.handle.net/2142/23981 en 1965 Stephen Eugene Schnatterly applied uniaxial stresses optical absorption f centers alkali halides F band lattice distortions tetragonal symmetry trigonal symmetry The effect of applied uniaxial stresses on the optical absorption of F centers in alkali halides Dissertation / Thesis text Physics Physics University of Illinois at Urbana-Champaign Dissertation Ph.D.