β Scribed by L.M. Goldby; R.J. Guest; R.E. Palmer
No coin nor oath required. For personal study only.
We have investigated the production of O-, 02 and 01 ions by electron-stimulated desorption from well-ordered films of physisorbed O2 on graphite. Resonances observed in the yield ofall products as a function ofelectron impact energy are attributed to dissociative electron attachment, generating O-ions which can react with neighbouring 0, molecules in the film. We interpret characteristic differences in the ion yield profiles from one product to another in terms of a simple binary collision model, which estimates the kinetic energy of the ion products and thus the probability of escape from the polarisation potential induced in the 0, film. The model is also consistent with the measured angular distributions of desorbed ions.
π SIMILAR VOLUMES
The reactions of C,Sc+ (n = 2-6) with O2 have been studied by using an rf ion trap. C&c+ was produced by the laser ablation of a mixed sample of graphite and scandium. Observed reaction product ions were ScO+ for all C,Sc.+, and BcD: only for C.Sc+ with odd n. In the case of C&c+, the loss of 2C neu
11i Chcrnisf~~. L'ln%ws& of Colorado\_ Boulder. Colorado SO309. USA \'ihr;ltional ctl~mi1unlinesccnc-c is dercctcd from the reaction N\*("P) i-Oz(S"Q in a flowing -after~lo\v. The atomtrnnsfcr product. NO+(X ' 1.+. u). displays a bimodal vibrationaldistribution spanning the nnge v = l-14. Excited N(