Protonium formation in the p-H collision at low energies by a diabatic approach

Journal Article · Sat May 01 04:00:00 EDT 2004 · Physical Review. A

DOI:https://doi.org/10.1103/PhysRevA.69.052712· OSTI ID:20643622

Hesse, M; Le, A T; Lin, C D ^[1]

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1. Department of Physics, Cardwell Hall, Kansas State University, Manhattan, Kansas 66506 (United States)

We present a diabatization technique in combination with the recently developed hyperspherical close coupling (HSCC) method. In contrast to the strict diabatization, our simple diabatization procedure transforms only sharp avoided crossings in the adiabatic hyperspherical potential curves into real crossings. With this approach, the weak collision channels can be removed from the close-coupling calculations. This method is used to study the antiproton-hydrogen collision at low energies. In the case of a scaled down (anti)proton mass, we show that a 10-channel calculation is enough to obtain converged cross sections at low energies. The results also indicate that protonium formation occurs mostly to the lowest states of the different excited protonium manifolds.

• OSTI ID: 20643622
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 5 Vol. 69; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
ANTIPROTONS
COUPLING
CROSS SECTIONS
EXCITED STATES
HYDROGEN
ION-ATOM COLLISIONS
POTENTIAL ENERGY
POTENTIALS
PROTONIUM