The impact of the cubic excess-electron cluster Na14F+12 against a graphite surface at low energies (0-20 eV) results selectively in the formation of Na13F+12. This fragmentation channel is interpreted as Na(0) desorption from the energized F-center cluster, confirming the prediction of such a low-energy channel [U. Landman, D. Scharf and J. Jortner, Phys. Rev. Letters 54 (1985) 1860] and validating the use of Na-desorption energies in calculating the abundance variations in neutral, excess-electron clusters [E.C. Honea, M.L. Homer and R.L. Whetten., Phys. Rev. Letters 63 (1989) 394]. The resemblance of the fragmentation patterns of Na14F+12 to that of Na13F+12 at higher energy impact (25-60 eV) indicates that the structure of the nascent Na13 F+12 generated by impact-heating is the same as that formed in the cold jet.
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Physical and Theoretical Chemistry