| ATOMIC AND MOLECULAR PHYSICS |
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Impact Excitations of Hydrogen Atoms in Collisions with Protons and Antiprotons |
| Reda S. Tantawi1**, T. E. I. Nassar2 |
1Mathematics Department, Faculty of Science, Zagazig University, Zagazig, Egypt
2Basic Science Department, Higher Technological Institute, Tenth of Ramadn City, Egypt
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| Cite this article: |
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Reda S. Tantawi, T. E. I. Nassar 2014 Chin. Phys. Lett. 31 083402 |
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Abstract The direct impact excitations of ground-state hydrogen atoms by protons and antiprotons are investigated by using an impact parameter treatment. The calculations are performed within the solution of the coupled differential equations arising from the one-center atomic-orbital close-coupling approach as well as the impact parameter version of the first and second Born approximations. We have considered calculations that allow couplings to the n=1–5 states (up to g sub-levels) of the target atom as well as others, which neglect the effect of all states other than the initial and final states of the target atom. The sensitivity of the cross sections to the charge of the projectile is studied. The calculated cross sections are compared with those obtained by previous theoretical and experimental results.
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| PACS: |
34.10.+x
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(General theories and models of atomic and molecular collisions and interactions (including statistical theories, transition state, stochastic and trajectory models, etc.))
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34.50.Fa
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(Electronic excitation and ionization of atoms (including beam-foil excitation and ionization))
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