Double-electron excitation of H[sup [minus]] by fast proton and antiproton impact

Journal Article · Sun May 01 04:00:00 EDT 1994 · Physical Review A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.49.3753· OSTI ID:5008433

Hino, K ^[1]; Nagase, M; Okamoto, H; Morishita, T; Matsuzawa, M ^[2]; Kimura, M ^[3]

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1. Department of Applied Physics and Chemistry, The University of Electro-Communications, Chofu, Tokyo 182 (Japan) Atomic Physics Laboratory, Institute of Physical and Chemical Research (RIKEN), Wako, Saitama 351-01 (Japan)
2. Department of Applied Physics and Chemistry, The University of Electro-Communications, Chofu, Tokyo 182 (Japan)
3. Argonne National Laboratory, Argonne, Illinois 60439 (United States) Department of Physics, Rice University, Houston, Texas 77251 (United States)

A theoretical investigation is carried out for double-electron excitation processes of H[sup [minus]] induced by proton and antiproton impact at the enegy of 1.5 MeV. Excitation cross sections to the 2[ital s][sup 2] [sup 1][ital S][sup [ital e]], 2[ital s]2[ital p] [sup 1][ital P][sup [ital o]], and 2[ital p][sup 2] [sup 1][ital D][sup [ital e]] states are calculated by using the plane-wave Born approximation, the distorted-wave Born approximation, and the close-coupling method. Wave functions of H[sup [minus]] are generated employing the hyperspherical coordinate method. It is shown that the low-lying continuum 1[ital skp] [sup 1][ital P][sup [ital o]] is identified as an important intermediate state in the double-electron excitation process to the 2[ital p][sup 2] [sup 1][ital D][sup [ital e]] state. We have also evaluated the ejected-electron spectra from the 2[ital s]2[ital p] [sup 1][ital P][sup [ital o]] shape-resonance state. It is found that its spectral shape is close to the observed line profile of the photodetachment of H[sup [minus]] since the excitation mechanism to this state is mostly dominated by the optically allowed transition at the projectile energy concerned here.

• OSTI ID: 5008433
• Journal Information: Physical Review A; (United States), Journal Name: Physical Review A; (United States) Vol. 49:5; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

664300* -- Atomic & Molecular Physics-- Collision Phenomena-- (1992-)
664500 -- Special Atoms & Molecules-- (1992-)
74 ATOMIC AND MOLECULAR PHYSICS
ANIONS
ANTIBARYONS
ANTIMATTER
ANTINUCLEI
ANTINUCLEONS
ANTIPARTICLES
ANTIPROTONS
BARYONS
CHARGED PARTICLES
COLLISIONS
CORRELATIONS
CROSS SECTIONS
ELECTRON CORRELATION
ELEMENTARY PARTICLES
ENERGY RANGE
ENERGY-LEVEL TRANSITIONS
EXCITATION
FERMIONS
HADRONS
HYDROGEN IONS
HYDROGEN IONS 1 MINUS
ION COLLISIONS
ION-ION COLLISIONS
IONS
MANY-BODY PROBLEM
MATTER
MEV RANGE
MEV RANGE 01-10
NUCLEI
NUCLEONS
PROTONS
TWO-BODY PROBLEM