부산대학교 도서관

To link to full-text access for this article, visit this link: http://dx.doi.org/10.1016/j.nimb.2007.03.031 Byline: B.E. Fuentes (a), A. Tejeda (b), H. Martinez (b) Keywords: Dissociative capture; Collision induced dissociation; Fragmentation mechanism; Ion fragmentation energies; Differential cross-sections; Cross-section; H 2 + ; SF.sub.6 Abstract: Absolute differential and total cross-sections for the production of H.sup.+ and H.sup.0 fragments in the energy range of 1-5keV and scattering angles from -4.6[degrees] to 4.6[degrees], for the collision of H.sub.2.sup.+ on SF.sub.6 are reported. The differential and total cross-sections for dissociative capture (DC) and collision-induced dissociation (CID) were estimated. The differential cross-sections (DCS) of DC and CID for all acceleration energies show a monotonic decrease with increasing angle, showing an overall decrease of three and two orders of magnitude for DC and CID respectively. The total cross-section for the DC process is found to be in the range of 10.0-40.0a'.sup.2, while for the CID process it is between 0.8 and 2.3a'.sup.2. Both measured total cross-sections display a slowly increasing behavior as a function of the incident energy. The results show that the cross-section for the DC process is about 13.2 times higher in average than that for the CID process. Author Affiliation: (a) Facultad de Ciencias, Universidad Nacional Autonoma de Mexico, Mexico, DF, Mexico (b) Instituto de Ciencias Fisicas, Universidad Nacional Autonoma de Mexico, Apartado Postal 48-3, 62251, Cuernavaca, Morelos, Mexico