Bryant Henry

Publication Date

1979

Document Type

Dissertation/Thesis

First Advisor

Shaffer, John C., 1938-2017

Degree Name

M.S. (Master of Science)

Legacy Department

Department of Physics

LCSH

Electron paramagnetic resonance spectroscopy; Copper; Argon

Abstract

This paper covers topics relevant to the isolation of copper in an argon matrix at 4.2 °K and the determination of the corresponding electron spin resonance spectrum. While no resonance spectrum was actually obtained, the material presented here provides much of the information necessary to obtain such a spectrum. An experimental determination was made of the rate at which copper evaporates from a tungsten filament. Though this data was found to agree with predicted evaporation rates only in a narrow range of temperatures, it is believed that in the region of interest the evaporation rates may be adequately predicted. Statistical methods were then employed to estimate the ideal ratio of copper to argon atoms in the matrix. The basic theory of electron spin resonance is discussed and the concept of a spin Hamiltonian is introduced. The effects of the matrix on the spectrum of copper are examined. The expected shift in the hyperfine constant of copper due to matrix effects is calculated using pertubation techniques and is found to agree with experimental results. Correlation was rather poor, however, when a similar treatment was applied to predict the matrix-induced shift in the spectroscopic splitting factor.

Comments

Includes bibliographical references.||Includes illustrations.

Extent

vi, 67 pages

Language

eng

Publisher

Northern Illinois University

Rights Statement

In Copyright

Rights Statement 2

NIU theses are protected by copyright. They may be viewed from Huskie Commons for any purpose, but reproduction or distribution in any format is prohibited without the written permission of the authors.

Media Type

Text

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