{"91011":{"#nid":"91011","#data":{"type":"event","title":"(11-0414) Prof. Ben McCall, University of Illinois at Urbana-Champaign","body":[{"value":"\u003Cp\u003EProf. Ben McCall, University of Illinois at Urbana-Champaign\n\u003C\/p\u003E\n\u003Cp\u003EAstrochemistry: From H\u003Csub\u003E3\u003C\/sub\u003E+ to C\u003Csub\u003E60\u003C\/sub\u003E\n\u003C\/p\u003E\n\u003Cp\u003ESchool Colloquia\n\u003C\/p\u003E\n\u003Cp\u003EOur galaxy\u00e2\u0080\u0099s interstellar medium contains roughly 10\u003Csup\u003E6 \u003C\/sup\u003E more molecules than the Earth, and over 150 different interstellar molecules have been definitively identified by high resolution spectroscopy.  However, our inventory of this vast chemical repository remains very incomplete, and our understanding of the chemical and physical processes that produce and destroy these molecules remains primitive.  Our group is engaged in an interdisciplinary program of laboratory experiments and astronomical observations aimed at answering some of the key unsolved questions in \u00e2\u0080\u009castrochemistry.\u00e2\u0080\u009d  In this talk, I will describe how our observations of H\u003Csub\u003E3\u003C\/sub\u003E\u003Csup\u003E+\u003C\/sup\u003E (the simplest polyatomic molecule) have revealed the presence of a large flux of low energy cosmic rays in diffuse interstellar clouds.  I will also present our laboratory measurements of the most common bimolecular reaction in the universe (H\u003Csub\u003E3\u003C\/sub\u003E\u003Csup\u003E+\u003C\/sup\u003E + H\u003Csub\u003E2\u003C\/sub\u003E -\u0026gt; H\u003Csub\u003E2\u003C\/sub\u003E + H\u003Csub\u003E3\u003C\/sub\u003E\u003Csup\u003E+\u003C\/sup\u003E) and the simplest electron recombination process for a polyatomic molecule (H\u003Csub\u003E3\u003C\/sub\u003E\u003Csup\u003E+\u003C\/sup\u003E + e- -\u0026gt; products), and discuss how these processes determine the ortho:para ratio of H3+ in these clouds.  I will provide an update on our development of two new laboratory techniques for molecular ion spectroscopy - cavity-enhanced velocity modulation spectroscopy (CEVMS) and sensitive, resolved, cooled ion beam spectroscopy (SCRIBES)- which we expect will ultimately enable the astronomical detection of more complex molecular ions.  Finally, I will report on our search for the first rotationally-resolved spectrum of C\u003Csub\u003E60\u003C\/sub\u003E, the largest and most symmetric molecule to be studied with high-resolution spectroscopy.\n\u003C\/p\u003E\n\u003Cp\u003EFor more information contact \u003Ca href=\u0022mailto:ken.brown@chemistry.gatech.edu\u0022\u003EProf. Ken Brown\u003C\/a\u003E (404-385-3124).\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"Prof. Ben McCall, University of Illinois at Urbana-Champaign\n\nAstrochemistry: From H\u003Csub\u003E3\u003C\/sub\u003E+ to C\u003Csub\u003E60\u003C\/sub\u003E\n\nSchool Colloquia","format":"limited_html"}],"field_summary_sentence":[{"value":"Prof. Ben McCall, University of Illinois at Urbana-Champaign"}],"uid":"27275","created_gmt":"2010-01-27 01:00:00","changed_gmt":"2016-10-08 01:48:32","author":"Shirley Tomes","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2011-04-14T17:00:00-04:00","event_time_end":"2011-04-14T18:00:00-04:00","event_time_end_last":"2011-04-14T18:00:00-04:00","gmt_time_start":"2011-04-14 21:00:00","gmt_time_end":"2011-04-14 22:00:00","gmt_time_end_last":"2011-04-14 22:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"related_links":[{"url":"http:\/\/chemistry.illinois.edu\/faculty\/Benjamin_McCall.html","title":"Prof. Benjamin McCall, University of Illinois at Urbana-Champaign"}],"groups":[{"id":"85951","name":"School of Chemistry and Biochemistry"}],"categories":[],"keywords":[{"id":"919","name":"Biochemistry"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cstrong\u003EShirley Tomes\u003C\/strong\u003E\u003Cbr \/\u003EChemistry \u0026amp; Biochemistry\u003Cbr \/\u003E\u003Ca href=\u0022http:\/\/www.gatech.edu\/contact\/index.html?id=st81\u0022\u003EContact Shirley Tomes\u003C\/a\u003E\u003Cbr \/\u003E\u003Cstrong\u003E404-894-0591\u003C\/strong\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}}}