University of Illinois Urbana-Champaign

Global and Local Models for Dilution Factors: Theory and Stimulated Emission Pumping Experiments

Lee, Sandra

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https://hdl.handle.net/2142/84214

Description

Title
Global and Local Models for Dilution Factors: Theory and Stimulated Emission Pumping Experiments
Author(s)
Lee, Sandra
Issue Date
2005
Doctoral Committee Chair(s)
Martin Gruebele
Department of Study
Chemistry
Discipline
Chemistry
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
Ph.D.
Degree Level
Dissertation
Keyword(s)
Chemistry, Physical
Language
eng
Abstract
The dilution factor is a measure of the intramolecular vibrational energy redistribution (IVR) an excited state undergoes. The distribution of dilution factors for a single molecule (SCCl2) was examined. Stimulated emission pumping (SEP) experiments were performed on SCCl2, probing the 7000--8,000 cm-1 range on the ground electronic state from first excited state and the 7,000--10,000+ cm-1 range from the second electronic state. An extended cross correlation analysis was applied to obtain more accurate measurements of dilution factors. Simulated SEP spectra were constructed according to two theoretical models: a globally random Golden Rule model and a locally random analytical model. Autocorrelation of the experimental and simulated differences revealed a simple and robust method of analyzing the distribution of dilution factors within a spectrum.
Graduation Semester
2005
Type of Resource
text
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http://hdl.handle.net/2142/84214

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