Optical Processes in Krypton and Krypton(2)fluoride: Absolute Cross-Sections for Multiphoton Ionization of Krypton (1S(0)), Photoionization of Metastable Atomic and Molecular States of Krypton, Andabsorption of Krypton(2)fluoride (4-Doublet-Gamma)

Geohegan, David Bruce

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https://hdl.handle.net/2142/77390 Copy

Description

Title

Optical Processes in Krypton and Krypton(2)fluoride: Absolute Cross-Sections for Multiphoton Ionization of Krypton (1S(0)), Photoionization of Metastable Atomic and Molecular States of Krypton, Andabsorption of Krypton(2)fluoride (4-Doublet-Gamma)

Author(s)

Geohegan, David Bruce

Issue Date

1986

Department of Study

Physics

Discipline

Physics

Degree Granting Institution

University of Illinois at Urbana-Champaign

Degree Name

Ph.D.

Degree Level

Dissertation

Keyword(s)

Physics, Atomic

Language

eng

Abstract

A microwave absorption apparatus has been used to measure a cross section for the three-photon, resonantly-enhanced ionization of Kr(('1)S(,0)) at 193 nm. The presence of a two-photon resonance with the Kr 6p 3/2 (,2) level enabled the generation of large electron densities and a measurement of the two-photon absorption cross section. A similar technique was developed to measure the photoionization cross sections for metastable Kr(,2) (('3)(SIGMA)(,u)('+)) and Kr (5s 3/2 (,2)) at 248 nm. The kinetics result of these experiments led to a method of producing Kr(,2)F (4('2)(GAMMA)). A fluorescence suppression technique was utilized to measure the absolute absorption spectra of Kr(,2)F (4('2)(GAMMA)) throughout the visible and at various points in the UV. Similar measurements were also made for Kr(,2)('+) (1(1/2)(,u)) and Xe(,2)Cl (4('2)(GAMMA)) and the results are compared. Photoassociation of KrF(B) was also observed and used as a further check on the results.

Graduation Semester

1986

Type of Resource

text

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http://hdl.handle.net/2142/77390

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