H2 dissociation by H+ and He2+ projectiles at intermediate energies
- Martínez, Sergio Hernán
- Bernardi, Guillermo Carlos
- Focke, Pedro Rodolfo
- Gonzalez, Alejandro Daniel
- Suarez, Sergio Gabriel
DOIAbstract
We have investigated proton emission from dissociated H2 molecules after colliding with H+ and He2+ ions with energies 25, 50 and 100 keV amu-1. The energy spectra of protons have been obtained covering the angular range from 10° to 170° and fragment energies from 3-15 eV for He2+ projectiles and in the 0-15 eV range for H+ impact, respectively. Using the Franck-Condon approximation we were able to find the relative contributions for some dissociation channels (2pπu, 2sσg, 2pσu and Coulomb explosion (CE)). For He2+ projectiles we found that the momentum transfer to the target must be included in the model to obtain a better description of the experimental results. When compared to the H+ impact case, we observe for He2+ projectiles the enha...
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