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Scattering of O(2) from a graphite surface.
MedLine Citation:
PMID:  22353319     Owner:  NLM     Status:  In-Data-Review    
Abstract/OtherAbstract:
Recently an extensive series of measurements has been presented for the angular distributions of oxygen molecules scattered from a graphite surface. Incident translational energies ranged from 291 to 614 meV with surface temperatures from 150 to 500 K. The measurements were taken with a fixed angle of 90° between the source beam and the detector and the angular distributions consisted of a single broad peak with the most probable intensity located at an angle slightly larger than the 45° specular position. Analysis with the hard cubes model for atom-surface scattering indicated that the scattering is primarily a single collision event with a surface having a collective effective mass much larger than a single carbon atom. Limited analysis with a classical diatomic molecular scattering theory was also presented. In this paper a more complete analysis using the classical diatomic molecular scattering theory is presented. The energy and temperature dependence of the observed angular distributions are well described as single collision events with a surface having an effective mass of 1.8 carbon graphite rings. In agreement with the earlier analysis and with other experiments, this suggests a large cooperative response of the carbon atoms in the outermost graphene layer.
Authors:
W W Hayes; Junepyo Oh; Takahiro Kondo; Keitaro Arakawa; Yoshihiko Saito; Junji Nakamura; J R Manson
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Publication Detail:
Type:  Journal Article     Date:  2012-02-21
Journal Detail:
Title:  Journal of physics. Condensed matter : an Institute of Physics journal     Volume:  24     ISSN:  1361-648X     ISO Abbreviation:  J Phys Condens Matter     Publication Date:  2012 Mar 
Date Detail:
Created Date:  2012-02-22     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101165248     Medline TA:  J Phys Condens Matter     Country:  England    
Other Details:
Languages:  eng     Pagination:  104010     Citation Subset:  IM    
Affiliation:
Physical Sciences Department, Greenville Technical College, Greenville, SC 29606, USA. Department of Physics and Astronomy, Clemson University, Clemson, SC 29634, USA.
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