Excitation of hydrogen atoms at intermediate and high energies by proton impact under a three-body Born–Faddeev-type formalism

• Published in: Journal of physics. B, Atomic, molecular, and optical physics Vol. 42; no. 12; pp. 125203 - 125203 (9)
• Main Authors: Fathi, R, Ghanbari-Adivi, E, Bolorizadeh, M A, Shojaei, F, Brunger, M J
• Format: Journal Article
• Language: English
• Published: Bristol IOP Publishing 28.06.2009; Institute of Physics
• Subjects: Atomic and molecular collision processes and interactions; Atomic and molecular physics; Electronic excitation and ionization of atoms (including beam-foil excitation and ionization); Exact sciences and technology; Physics; Scattering of atoms, molecules and ions; Protons; Ion-atom collisions; Transition matrix; Ground states; Three-body problem; Differential cross sections; Hydrogen Atoms; Faddeev equations; Excitation; Excited states; Cross sections
• ISSN: 0953-4075; 1361-6455
• DOI: 10.1088/0953-4075/42/12/125203

In this work, differential cross sections have been calculated for the excitation of atomic hydrogen (H) from its ground state (1s) into a selection of its excited states (2s, 2p0, 2p+/-1 and 3s). The present study was conducted at intermediate and high proton impact energies within the range 50 keV-1 MeV. A three-body model based on Faddeev-type equations is implemented, while near the energy shell the two-body Coulomb transition matrix was used to calculate the transition amplitude. Second and higher order approximations have been ignored in this case. The resulting amplitudes are subsequently utilized to calculate total and differential cross sections for the corresponding excitation processes. These calculated cross sections have then been compared with available experimental data and other theoretical results from the literature.