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oai:www.ideals.illinois.edu:2142/23368 2023-07-10 col_2142_5131 col_2142_8888 com_2142_5130 com_2142_8887 com_2142_234

Eden, James G. Jones, Ronald Blake 2011-05-07T14:11:42Z 2011-05-07T14:11:42Z 10000-01-01 1992 Laser excitation spectroscopy of transitions having dissociative ground states was explored as a tool for the study of excimer molecules. Since the repulsive nature of the ground state constrains collision pairs to large internuclear transitions, bound $\gets$ free excitation spectra contain more structure than the bound $\to$ free fluorescence spectra for the same molecules, therefore containing more information about the potential surfaces. Unique properties of the photoassociative excitation spectroscopy technique are described which allow the dependence of the dipole transition moment on the internuclear separation ($\mu$(R)) to be extracted in a very direct manner. Excitation spectra are presented for the B $\gets$ X transitions of KrF and XeI for the wavelength ($\lambda$) interval 206 nm $<$ $\lambda$ $<$ 255 nm. The excitation spectra are analyzed using an iterative trial and error comparison with calculated spectra. The effect of the rotational potential is examined. Potential surfaces and the $\mu$(R) results are given for both molecules. The possible use of the technique is then discussed for excimer molecules having predissociative upper states. Some preliminary results for KrI are given. This work required the development of a tunable VUV source, which is described. Made available in DSpace on 2011-05-07T14:11:42Z (GMT). No. of bitstreams: 2 license.txt: 4922 bytes, checksum: 910b249b4beec47e7ab768910c8f966f (MD5) 9236493.pdf: 2311003 bytes, checksum: 6dbfa5c81c6ee4a301867e4bb2e9a251 (MD5) Previous issue date: 1992 Item marked as restricted to the 'UIUC Users [automated]' Group (id=2) by Howard Ding (hding2@illinois.edu) on 2011-05-07T15:04:00Z Item is restricted indefinitely. Restriction data tranferred 2014-07-01T11:30:32-05:00 Original Data Group with Access UIUC Users [automated] Release Date: none Reason: ETDs are only available to UIUC Users without author permission ETDs are only available to UIUC Users without author permission U of I Only AAI9236493 (UMI)AAI9236493 http://hdl.handle.net/2142/23368 eng Copyright 1992 Jones, Ronald Blake Physics, Molecular Photoassociative excitation spectroscopy of excimer molecules text Electrical and Computer Engineering Electrical and Computer Engineering University of Illinois at Urbana-Champaign Dissertation Ph.D.