{"90381":{"#nid":"90381","#data":{"type":"event","title":"(11-0131) Prof. Thomas Orlando, Georgia Tech, AACP Seminar Series","body":[{"value":"\u003Cp\u003EProf. Thomas Orlando, Georgia Tech\n\u003C\/p\u003E\n\u003Cp\u003EPARTICLE-INDUCED SURFACE PROCESSES\u003Cbr \/\u003E\nIN THE SOLAR SYSTEM\n\u003C\/p\u003E\n\u003Cp\u003EAACP Seminar Series\n\u003C\/p\u003E\n\u003Cp\u003EMaterial degradation (i.e. space weathering) in our solar system is known to involve the interaction of solar-wind and magnetospheric particles (ions and electrons) with the surfaces of airless bodies.  Since high energy particles create low-energy electrons, most non-thermal degradation\/transformations result from the inelastic scattering of secondary electrons.  Therefore, the damage is inherently due to electronic excitations and the chemical products formed are often exotic and not easily produced under normal thermal conditions.  This is true for complex targets such as minerals on planet, lunar and asteroid surfaces, as well as mixed low-temperature ices on outer solar system grains or within comets. \n\u003C\/p\u003E\n\u003Cp\u003EOur experimental and modeling activities in low-energy (5-50 eV) electron and 5 keV proton induced processes on minerals characteristic of Mercury and Earth\u00e2\u0080\u0099s moon will be emphasized.  Specifically, we examine i) the role of magnetospheric \u00e2\u0080\u009ctornadoes\u00e2\u0080\u009d and electron precipitation in contributing to the formation of Mercury\u00e2\u0080\u0099s exosphere [1], ii) the thermal removal of water [2] and the purported formation of water via solar wind impact on regoliths and  iii) the oxidation and formation of some complex hydrocarbons during the irradiation of nanoscale ice films on graphitic surfaces reminiscent of interstellar grains.  \n\u003C\/p\u003E\n\u003Cp\u003E[1]\tJ. MClain, G. A. Grieves, A. Sprague, D. Schriver, P.  Travinicek and T. M. Orlando, in press, J. Geophys. Res.\u003Cbr \/\u003E\n[2]\tM. D. Dyar, C. A. Hibbitts, and T. M. Orlando, Icarus, 208, 425, (2010).\n\u003C\/p\u003E\n\u003Cp\u003EFor more information contact \u003Ca href=\u0022mailto:christine.payne@chemistry.gatech.edu\u0022\u003EProf. Christine Payne\u003C\/a\u003E (404-385-3125) or \u003Ca href=\u0022mailto:swidicu@emory.edu\u0022\u003EProf. Susanna Widicus Weaver\u003C\/a\u003E (404-727-4049).\n\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"Prof. Thomas Orlando, Georgia Tech\n\nPARTICLE-INDUCED SURFACE PROCESSES \nIN THE SOLAR SYSTEM\n\nAACP Seminar Series","format":"limited_html"}],"field_summary_sentence":[{"value":"Prof. Thomas Orlando, Georgia Tech, AACP Seminar Series"}],"uid":"27275","created_gmt":"2010-05-24 00:00:00","changed_gmt":"2016-10-08 01:47:17","author":"Shirley Tomes","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2011-01-31T18:30:00-05:00","event_time_end":"2011-01-31T20:00:00-05:00","event_time_end_last":"2011-01-31T20:00:00-05:00","gmt_time_start":"2011-01-31 23:30:00","gmt_time_end":"2011-02-01 01:00:00","gmt_time_end_last":"2011-02-01 01:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"related_links":[{"url":"http:\/\/www.chemistry.gatech.edu\/faculty\/Orlando\/","title":"Prof. Thomas M. Orlando, Georgia Tech"}],"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":""}}}