{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/81225"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/81225","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Excited State Spectroscopy of Diatomic Argon","abstract":"Laser-induced fluorescence spectra for the $7p\\sigma\\ \\sp3\\Sigma\\sbsp{g}{+}\\gets a\\ \\sp3\\Sigma\\sbsp{u}{+}$ transition have led to the first resolved triplet splittings and rotational analyses for Rydberg-Rydberg transitions in Ar$\\sb2.$ Analyses for the (0-0), (0-1), (1-0), and (1-1) bands of $7p\\sigma\\gets a$ are presented here. Bands with $\\rm v\\sp\\prime=2$ are observed for this system but exhibit no rotational structure and bands with $\\rm v\\sp\\prime>2$ are not observed, indicating that the predissociation lifetimes of these upper levels fall rapidly for $\\rm v\\sp\\prime>1.$ Data presented lead to rotational energies and molecular constants for the $a\\ \\sp3\\Sigma\\sbsp{u}{+}$ and $7p\\sigma\\ \\sp3\\Sigma\\sbsp{g}{+}$ states, including the effective rotational constant $B\\sb{e},$ which is determined to be 0.1412 cm$\\sp{-1}$ and 0.1345 cm$\\sp{-1}$ for the $4s\\sigma\\ a\\ \\sp3\\Sigma\\sbsp{u}{+}$ and $7p\\sigma\\ \\sp3\\Sigma\\sbsp{g}{+}$ states, respectively. Results are compared to ab initio and other calculations, and combined with existing data to produce experimental estimates of $D\\sb0$ and $D\\sb{e}$ for the $a\\ \\sp3\\Sigma\\sbsp{u}{+}$ state of 5700 $\\pm$ 200 cm$\\sp{-1}$ and 5850 $\\pm$ 200 cm$\\sp{-1},$ respectively.","abstract_html":"Laser-induced fluorescence spectra for the <span class=\"etd-inline-math\">7p&sigma; \\sp3\\Sigma\\sbsp{g}{+}\\gets a \\sp3\\Sigma\\sbsp{u}{+}</span> transition have led to the first resolved triplet splittings and rotational analyses for Rydberg-Rydberg transitions in Ar$\\sb2.$ Analyses for the (0-0), (0-1), (1-0), and (1-1) bands of <span class=\"etd-inline-math\">7p&sigma;\\gets a</span> are presented here. Bands with $\\rm v\\sp\\prime=2$ are observed for this system but exhibit no rotational structure and bands with $\\rm v\\sp\\prime&gt;2$ are not observed, indicating that the predissociation lifetimes of these upper levels fall rapidly for $\\rm v\\sp\\prime&gt;1.$ Data presented lead to rotational energies and molecular constants for the <span class=\"etd-inline-math\">a \\sp3\\Sigma\\sbsp{u}{+}</span> and <span class=\"etd-inline-math\">7p&sigma; \\sp3\\Sigma\\sbsp{g}{+}</span> states, including the effective rotational constant $B\\sb{e},$ which is determined to be 0.1412 cm$\\sp{-1}$ and 0.1345 cm$\\sp{-1}$ for the <span class=\"etd-inline-math\">4s&sigma; a \\sp3\\Sigma\\sbsp{u}{+}</span> and <span class=\"etd-inline-math\">7p&sigma; \\sp3\\Sigma\\sbsp{g}{+}</span> states, respectively. Results are compared to ab initio and other calculations, and combined with existing data to produce experimental estimates of $D\\sb0$ and $D\\sb{e}$ for the <span class=\"etd-inline-math\">a \\sp3\\Sigma\\sbsp{u}{+}</span> state of 5700 $\\pm$ 200 cm$\\sp{-1}$ and 5850 $\\pm$ 200 cm$\\sp{-1},$ respectively.","abstract_has_math":true,"creators":["Herring, Cyrus McNeely"],"institution":"University of Illinois at Urbana-Champaign","degree_name":"Ph.D.","degree_level":"Dissertation","degree_discipline":"Electrical Engineering","degree_department":null,"school":null,"contributors":["Eden, J.G."],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2015,"date_issued":"2015-09-25T20:10:08Z","date_published":"2015-09-25T20:10:08Z","updated_at":"2026-07-22T22:26:15Z","subjects":["Chemistry, Physical"],"languages":["eng"],"rights":[],"rights_urls":[],"identifier_entries":[{"key":"dc:identifier","label":"Identifier","values":["(MiAaPQ)AAI9834688"],"render_values":[{"text":"(MiAaPQ)AAI9834688","href":null,"code":true}]}]},"links":{"outbound_url":"http://hdl.handle.net/2142/81225","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Eden, J.G."]},{"key":"dc:creator","label":"Author","values":["Herring, Cyrus McNeely"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2015-09-25T20:10:08Z","10000-01-01","1998"]},{"key":"dc:type","label":"Dc Type","values":["text"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Electrical Engineering"]},{"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":["Chemistry, Physical"]}]},{"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/2142/81225","(MiAaPQ)AAI9834688"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["Laser-induced fluorescence spectra for the $7p\\sigma\\ \\sp3\\Sigma\\sbsp{g}{+}\\gets a\\ \\sp3\\Sigma\\sbsp{u}{+}$ transition have led to the first resolved triplet splittings and rotational analyses for Rydberg-Rydberg transitions in Ar$\\sb2.$ Analyses for the (0-0), (0-1), (1-0), and (1-1) bands of $7p\\sigma\\gets a$ are presented here. Bands with $\\rm v\\sp\\prime=2$ are observed for this system but exhibit no rotational structure and bands with $\\rm v\\sp\\prime>2$ are not observed, indicating that the predissociation lifetimes of these upper levels fall rapidly for $\\rm v\\sp\\prime>1.$ Data presented lead to rotational energies and molecular constants for the $a\\ \\sp3\\Sigma\\sbsp{u}{+}$ and $7p\\sigma\\ \\sp3\\Sigma\\sbsp{g}{+}$ states, including the effective rotational constant $B\\sb{e},$ which is determined to be 0.1412 cm$\\sp{-1}$ and 0.1345 cm$\\sp{-1}$ for the $4s\\sigma\\ a\\ \\sp3\\Sigma\\sbsp{u}{+}$ and $7p\\sigma\\ \\sp3\\Sigma\\sbsp{g}{+}$ states, respectively. Results are compared to ab initio and other calculations, and combined with existing data to produce experimental estimates of $D\\sb0$ and $D\\sb{e}$ for the $a\\ \\sp3\\Sigma\\sbsp{u}{+}$ state of 5700 $\\pm$ 200 cm$\\sp{-1}$ and 5850 $\\pm$ 200 cm$\\sp{-1},$ respectively.","Made available in DSpace on 2015-09-25T20:10:08Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 9834688.pdf: 3871782 bytes, checksum: 6cec16c4bbcfdec45e7d2612154fe79b (MD5) Previous issue date: 1998","Embargo set by: Seth Robbins for item 82506 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","78 p.","Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 1998."]},{"key":"dc:title","label":"Title","values":["Excited State Spectroscopy of Diatomic Argon"]}]}],"canonical_facts":{"dc:contributor":["Eden, J.G."],"dc:creator":["Herring, Cyrus McNeely"],"dc:date":["2015-09-25T20:10:08Z","10000-01-01","1998"],"dc:description":["Laser-induced fluorescence spectra for the $7p\\sigma\\ \\sp3\\Sigma\\sbsp{g}{+}\\gets a\\ \\sp3\\Sigma\\sbsp{u}{+}$ transition have led to the first resolved triplet splittings and rotational analyses for Rydberg-Rydberg transitions in Ar$\\sb2.$ Analyses for the (0-0), (0-1), (1-0), and (1-1) bands of $7p\\sigma\\gets a$ are presented here. Bands with $\\rm v\\sp\\prime=2$ are observed for this system but exhibit no rotational structure and bands with $\\rm v\\sp\\prime>2$ are not observed, indicating that the predissociation lifetimes of these upper levels fall rapidly for $\\rm v\\sp\\prime>1.$ Data presented lead to rotational energies and molecular constants for the $a\\ \\sp3\\Sigma\\sbsp{u}{+}$ and $7p\\sigma\\ \\sp3\\Sigma\\sbsp{g}{+}$ states, including the effective rotational constant $B\\sb{e},$ which is determined to be 0.1412 cm$\\sp{-1}$ and 0.1345 cm$\\sp{-1}$ for the $4s\\sigma\\ a\\ \\sp3\\Sigma\\sbsp{u}{+}$ and $7p\\sigma\\ \\sp3\\Sigma\\sbsp{g}{+}$ states, respectively. Results are compared to ab initio and other calculations, and combined with existing data to produce experimental estimates of $D\\sb0$ and $D\\sb{e}$ for the $a\\ \\sp3\\Sigma\\sbsp{u}{+}$ state of 5700 $\\pm$ 200 cm$\\sp{-1}$ and 5850 $\\pm$ 200 cm$\\sp{-1},$ respectively.","Made available in DSpace on 2015-09-25T20:10:08Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 9834688.pdf: 3871782 bytes, checksum: 6cec16c4bbcfdec45e7d2612154fe79b (MD5) Previous issue date: 1998","Embargo set by: Seth Robbins for item 82506 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","78 p.","Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 1998."],"dc:identifier":["http://hdl.handle.net/2142/81225","(MiAaPQ)AAI9834688"],"dc:language":["eng"],"dc:subject":["Chemistry, Physical"],"dc:title":["Excited State Spectroscopy of Diatomic Argon"],"dc:type":["text"],"thesis:degree_discipline":["Electrical Engineering"],"thesis:degree_level":["Dissertation"],"thesis:degree_name":["Ph.D."],"thesis:institution_name":["University of Illinois at Urbana-Champaign"]},"updated_at":"2026-07-22T22:26:15Z"}