{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/90584"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/90584","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"High-resolution spectroscopic studies of carbon-containing species","abstract":"High-resolution spectra of molecules and ions can provide valuable information fundamentally and astrochemically. From the fundamental side, high-resolution rovibrational spectroscopy allows molecular constants to be determined and provides evidence of theoretical assumptions. Work to this end was performed using cavity-ringdown spectroscopy and either a gas phase or supercritical fluid supersonic expansion source. Future work will focus on optimizing the supercritical fluid source, in addition to setting up a positive column for the study of molecular ions. Astrochemically, rovibrational and rovibronic spectroscopy can allow for the column density of species to be determined towards different sightlines in the interstellar medium. This is accomplished by either obtaining laboratory absorption spectra of species of interest to compare to astronomical observations or by using fitting procedures and modeling programs to analyze previously obtained astronomical spectra. Laboratory spectra from gas phase and supercritical phase 1,3,5-trioxane, and fitting and modeling procedures for the analysis of C3 are included. In addition, future goals for each project, including a proposed ion source for cavity ringdown spectroscopy, are described.","abstract_html":"High-resolution spectra of molecules and ions can provide valuable information fundamentally and astrochemically. From the fundamental side, high-resolution rovibrational spectroscopy allows molecular constants to be determined and provides evidence of theoretical assumptions. Work to this end was performed using cavity-ringdown spectroscopy and either a gas phase or supercritical fluid supersonic expansion source. Future work will focus on optimizing the supercritical fluid source, in addition to setting up a positive column for the study of molecular ions. Astrochemically, rovibrational and rovibronic spectroscopy can allow for the column density of species to be determined towards different sightlines in the interstellar medium. This is accomplished by either obtaining laboratory absorption spectra of species of interest to compare to astronomical observations or by using fitting procedures and modeling programs to analyze previously obtained astronomical spectra. Laboratory spectra from gas phase and supercritical phase 1,3,5-trioxane, and fitting and modeling procedures for the analysis of C3 are included. In addition, future goals for each project, including a proposed ion source for cavity ringdown spectroscopy, are described.","abstract_has_math":false,"creators":["Koeppen, Nicole"],"institution":"University of Illinois at Urbana-Champaign","degree_name":"M.S.","degree_level":"Thesis","degree_discipline":"Chemistry","degree_department":null,"school":null,"contributors":["McCall, Benjamin"],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2016,"date_issued":"2016-07-07T19:54:21Z","date_published":"2016-07-07T19:54:21Z","updated_at":"2026-07-22T22:26:34Z","subjects":["spectroscopy","astrochemistry","mid-IR","high-resolution","cavity-ringdown","supercritical fluid"],"languages":["en"],"rights":["Copyright 2016 Nicole Koeppen"],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"http://hdl.handle.net/2142/90584","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["McCall, Benjamin"]},{"key":"dc:creator","label":"Author","values":["Koeppen, Nicole"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2016-07-07T19:54:21Z","2016-04-21","2016-05"]},{"key":"dc:type","label":"Dc Type","values":["text"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Chemistry"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Thesis"]},{"key":"thesis:degree_name","label":"Degree Name","values":["M.S."]},{"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":["spectroscopy","astrochemistry","mid-IR","high-resolution","cavity-ringdown","supercritical fluid"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["en"]},{"key":"dc:rights","label":"Dc Rights","values":["Copyright 2016 Nicole Koeppen"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["http://hdl.handle.net/2142/90584"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["High-resolution spectra of molecules and ions can provide valuable information fundamentally and astrochemically. From the fundamental side, high-resolution rovibrational spectroscopy allows molecular constants to be determined and provides evidence of theoretical assumptions. Work to this end was performed using cavity-ringdown spectroscopy and either a gas phase or supercritical fluid supersonic expansion source. Future work will focus on optimizing the supercritical fluid source, in addition to setting up a positive column for the study of molecular ions. Astrochemically, rovibrational and rovibronic spectroscopy can allow for the column density of species to be determined towards different sightlines in the interstellar medium. This is accomplished by either obtaining laboratory absorption spectra of species of interest to compare to astronomical observations or by using fitting procedures and modeling programs to analyze previously obtained astronomical spectra. Laboratory spectra from gas phase and supercritical phase 1,3,5-trioxane, and fitting and modeling procedures for the analysis of C3 are included. In addition, future goals for each project, including a proposed ion source for cavity ringdown spectroscopy, are described.","Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2016-07-07 without embargo terms","The student, Nicole Koeppen, accepted the attached license on 2016-04-19 at 17:50.","The student, Nicole Koeppen, submitted this Thesis for approval on 2016-04-19 at 17:55.","This Thesis was approved for publication on 2016-04-21 at 13:34.","DSpace SAF Submission Ingestion Package generated from Vireo submission #9357 on 2016-07-07 at 13:31:38","Made available in DSpace on 2016-07-07T19:54:21Z (GMT). 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Future work will focus on optimizing the supercritical fluid source, in addition to setting up a positive column for the study of molecular ions. Astrochemically, rovibrational and rovibronic spectroscopy can allow for the column density of species to be determined towards different sightlines in the interstellar medium. This is accomplished by either obtaining laboratory absorption spectra of species of interest to compare to astronomical observations or by using fitting procedures and modeling programs to analyze previously obtained astronomical spectra. Laboratory spectra from gas phase and supercritical phase 1,3,5-trioxane, and fitting and modeling procedures for the analysis of C3 are included. In addition, future goals for each project, including a proposed ion source for cavity ringdown spectroscopy, are described.","Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2016-07-07 without embargo terms","The student, Nicole Koeppen, accepted the attached license on 2016-04-19 at 17:50.","The student, Nicole Koeppen, submitted this Thesis for approval on 2016-04-19 at 17:55.","This Thesis was approved for publication on 2016-04-21 at 13:34.","DSpace SAF Submission Ingestion Package generated from Vireo submission #9357 on 2016-07-07 at 13:31:38","Made available in DSpace on 2016-07-07T19:54:21Z (GMT). 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