{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/77390"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/77390","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"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)","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.","abstract_html":"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.","abstract_has_math":false,"creators":["Geohegan, David Bruce"],"institution":"University of Illinois at Urbana-Champaign","degree_name":"Ph.D.","degree_level":"Dissertation","degree_discipline":"Physics","degree_department":null,"school":null,"contributors":[],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2015,"date_issued":"2015-05-13T15:41:50Z","date_published":"2015-05-13T15:41:50Z","updated_at":"2026-07-22T22:26:10Z","subjects":["Physics, Atomic"],"languages":["eng"],"rights":[],"rights_urls":[],"identifier_entries":[{"key":"dc:identifier","label":"Identifier","values":["(UMI)AAI8623303"],"render_values":[{"text":"(UMI)AAI8623303","href":null,"code":true}]}]},"links":{"outbound_url":"http://hdl.handle.net/2142/77390","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:creator","label":"Author","values":["Geohegan, David Bruce"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2015-05-13T15:41:50Z","10000-01-01","1986"]},{"key":"dc:type","label":"Dc Type","values":["text"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Physics"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Dissertation"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Ph.D."]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["University of Illinois at Urbana-Champaign"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Physics, Atomic"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["eng"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["http://hdl.handle.net/2142/77390","(UMI)AAI8623303"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["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.","Made available in DSpace on 2015-05-13T15:41:50Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 8623303.PDF: 4021651 bytes, checksum: f7ee9920fc343f9f94bdf4aa6c4d1829 (MD5) Previous issue date: 1986","Embargo set by: Seth Robbins for item 78601 Lift date: Forever Reason: Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs","Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs","U of I Only","133 p.","Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 1986."]},{"key":"dc:title","label":"Title","values":["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)"]}]}],"canonical_facts":{"dc:creator":["Geohegan, David Bruce"],"dc:date":["2015-05-13T15:41:50Z","10000-01-01","1986"],"dc:description":["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.","Made available in DSpace on 2015-05-13T15:41:50Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 8623303.PDF: 4021651 bytes, checksum: f7ee9920fc343f9f94bdf4aa6c4d1829 (MD5) Previous issue date: 1986","Embargo set by: Seth Robbins for item 78601 Lift date: Forever Reason: Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs","Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs","U of I Only","133 p.","Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 1986."],"dc:identifier":["http://hdl.handle.net/2142/77390","(UMI)AAI8623303"],"dc:language":["eng"],"dc:subject":["Physics, Atomic"],"dc: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)"],"dc:type":["text"],"thesis:degree_discipline":["Physics"],"thesis:degree_level":["Dissertation"],"thesis:degree_name":["Ph.D."],"thesis:institution_name":["University of Illinois at Urbana-Champaign"]},"updated_at":"2026-07-22T22:26:10Z"}