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http://hdl.handle.net/11154/2522
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Title: | Dissociative excitation and fragmentation cross section of HeH+ molecular ions in collision with He |
Authors: | Yousif, FB Dominguez, JI |
Issue Date: | 2002 |
Abstract: | We investigated H+ and He+ fragment production from the dissociation of HeH+ ions in collision with a He target. This occurs through either the He++H or the He+H+ channel. We also investigated He2+ and H- production, which are three orders of magnitude smaller than those for H+ and He+. The He+/H channel seems to be favored over the H+/He channel at all acceleration energies as well as at all ion source pressures. The H+ and He+ cross sections appear to be independent of the acceleration energy while they show significant dependence on ion source pressures. The center of mass energy distribution for both H+ and He+ shows a kinetic energy release of near zero eV. Our results suggest that the initial state of the parent HeH+ molecular ions is that of a mixture of ground electronic state as well as metastable excited states with the a (3)Sigma(+) dominant. |
URI: | http://hdl.handle.net/11154/2522 |
ISSN: | 1050-2947 |
Appears in Collections: | Ciencias
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