Award Date

1-1-1995

Degree Type

Thesis

Degree Name

Master of Science (MS)

Department

Physics

First Committee Member

David P. Shelton

Number of Pages

55

Abstract

The second hyperpolarizabilities {dollar}\gamma{dollar} have been measured at {dollar}\lambda{dollar} = 632.8 nm for argon (Ar), methane (CH{dollar}\sb4{dollar}), carbon tetrafluoride (CF{dollar}\sb6{dollar}), and sulfur hexafluoride (SF{dollar}\sb6{dollar}) by means of the dc Kerr effect in the gas phase. Measurements were made over a range of densities and extrapolated to the zero density limit. The results obtained have an uncertainty of 1.7%, 1.1%, 0.8%, and 0.5% for SF{dollar}\sb6{dollar}, CF{dollar}\sb4{dollar}, Ar, and CH{dollar}\sb4{dollar}, respectively. A comparison with other dc Kerr results shows our results to be the most accurate to date, thereby providing a better standard for judging quantum chemistry calculations of {dollar}\gamma{dollar}. The difference between the dc Kerr and electric-field-induced second harmonic generation (ESHG) vibrational hyperpolarizabilities, ({dollar}\rm \gamma\sb{K}\sp{V} - \gamma\sb{E}\sp{V}{dollar}), has been determined for CH{dollar}\sb4{dollar}, CF{dollar}\sb4{dollar}, and SF{dollar}\sb6{dollar}. The result for CH{dollar}\sb4{dollar} is found to be in good agreement with recent calculations by Bishop

Keywords

Argon; Carbon; Hexafluoride; Hyperpolarizabilty; Measurement; Methane; Second; Sulfur; Tetrafluoride

Controlled Subject

Optics

File Format

pdf

File Size

1894.4 KB

Degree Grantor

University of Nevada, Las Vegas

Language

English

Permissions

If you are the rightful copyright holder of this dissertation or thesis and wish to have the full text removed from Digital Scholarship@UNLV, please submit a request to digitalscholarship@unlv.edu and include clear identification of the work, preferably with URL.

Rights

IN COPYRIGHT. For more information about this rights statement, please visit http://rightsstatements.org/vocab/InC/1.0/

Download


Share

COinS