Doctoral Dissertations

Abstract

"A new method for obtaining the cross section for photoionization of photoexcited cesium is presented. The salient feature of this experiment is to use three crossed beams, i.e., two light beams intersecting a beam of cesium atoms. The cross section is determined by counting the ions produced by the two step process: Cs (6S) + h[upsilon]₁ --> Cs (6P) ; Cs (6P) + [upsilon]₂ --> Cs⁺ + e⁻ The relative cross section for the second step has been obtained from threshold (5060 Å) to 2500 Å. The excitation light source used in obtaining this cross section was a rf resonance lamp, but the possibility of using a GaAs laser as this light source was also investigated. A GaAs laser was thermally tuned to the 6S - 6P transition wavelength in cesium, 8521 Å, and it was found that in this way the hyperfine levels of the ground state of cesium could be selectively depopulated. Although excellent results were obtained in this portion of the study, the low duty cycle of the lasers that we had available made them unsuitable for the photoionization experiment"--Abstract, page ii

Advisor(s)

Nygaard, Kaare J.

Committee Member(s)

Lund, Louis H., 1919-1998
Levine, Norman E.
Snow, William R.
Anderson, Richard A.

Department(s)

Physics

Degree Name

Ph. D. in Physics

Sponsor(s)

University of Missouri--Rolla. Department of Physics
United States. Office of Naval Research
National Science Foundation (U.S.)

Publisher

University of Missouri--Rolla

Publication Date

1971

Journal article titles appearing in thesis/dissertation

  • Selective depopulation of the 6²S[subscript 1/2](F=3)-level in cesium
  • Modal behavior and temperature tuning of pulsed room temperature GaAs lasers

Pagination

vi, 78 pages

Note about bibliography

Includes bibliographical references.

Rights

© 1971 Robert E. Hebner , Jr., All rights reserved.

Document Type

Dissertation - Open Access

File Type

text

Language

English

Library of Congress Subject Headings

Photoionization cross sections
Photoionization
Cesium
Resonance lamps

Thesis Number

T 2627

Print OCLC #

6038855

Electronic OCLC #

876049070

Included in

Physics Commons

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