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279 - Xanes Studies on UV-Irradiated Interstellar Ice Analogs: A Comparison to STARDUST SamplesWe present C-, N-, and O-XANES (X-ray Absorption Near-Edge Spectroscopy) results of organic residues produced in the laboratory from the UV irradiation of astrophysical ice analogs containing H20, CO, CH30H, NH31 in order to mimic processes that may occur in cold icy bodies of the outer Solar System, particularly in comets, Such analyses showed that laboratory-formed organic residues mainly consist of a solid phase and an oily phase. C-XANES analysis of the solid phase suggests a rich distribution of organic functionalities, among which carbonyl groups, C=C bonds, and alcohols are present. Results from N-XANES indicate the possible presence of amide, amine, and nitrile groups, The O-XANES spectra confirmed the a-bearing groups, These results are compared with the XANES spectra obtained from STARDUST cometary samples,
Document ID
20100014808
Acquisition Source
Goddard Space Flight Center
Document Type
Conference Paper
Authors
Milam, Stefanie N.
(NASA Ames Research Center Moffett Field, CA, United States)
Cody, George D.
Kilcoyne, A. L. David
Nuevo, Michel
Sandford, Scott A.
Stroud, Rhonda M.
DeGregorio, Bradley T.
Date Acquired
August 24, 2013
Publication Date
March 20, 2010
Subject Category
Lunar And Planetary Science And Exploration
Meeting Information
Meeting: American Chemical Society (ACS) #13746-10-ST Conference
Location: San Francisco, CA
Country: United States
Start Date: March 20, 2010
End Date: March 25, 2010
Distribution Limits
Public
Copyright
Other

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