Abstract
Experimental results together with a thermokinetic and a dynamic zone structure (DZS) model are presented for the scattering of argon clusters off a graphite surface. Density and time-of-flight angular distributions for a large range of surface temperatures, angles of incidence, and large incident cluster sizes (up to 8700 atoms) exhibit three different outcoming channels: two direct inelastic ones and an enhanced trapping-desorption one. The first inelastic process has been identified and modelized as a thermal evaporation of monomers from clusters gliding along the surface. The second one is characterised by a grazing exit angle component attributed to large cluster fragments leaving the surface before total evaporation and quantitatively reproduced by the DZS model. Finally, the trapping-desorption process results in a significant velocity thermalization with an absolute atom trapping probability enhanced by a factor as large as three for incident clusters over that for incident individual atoms and concerns up to 25% of the incoming cluster atoms.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
