Optical model for positronium formation cross sections in e{sup +}-K collisions at low impact energies

Journal Article · Fri Jul 15 00:00:00 EDT 2005 · Physical Review. A

DOI:https://doi.org/10.1103/PhysRevA.72.012709· OSTI ID:20718367

Nan, G; Zhou, Y; Ke, Y ^[1]

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1. Institute of Atomic and Molecular Physics, Jilin University, Changchun 130012 (China)

Positronium (Ps) formation cross sections are calculated for positrons scattered by ground-state potassium in the low-energy region (0.2-15.0 eV) using an optical-model approach. Cross sections for Ps formation in n=3 states are obtained for the second time and show great discrepancies with the prediction of McAlinden et al. [J. Phys. B 29, 555 (1996)]. Fairly good agreement is obtained with the measurements of Zhou et al. [Phys. Rev. Lett. 73, 236 (1994)] for a total Ps formation cross section when taking Ps (n=3) formation into account. We present here a full description for Ps (n=1), Ps (n=2), and Ps (n=3) formation cross sections.

• OSTI ID: 20718367
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 1 Vol. 72; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
CROSS SECTIONS
EV RANGE
GROUND STATES
OPTICAL MODELS
POSITRON-ATOM COLLISIONS
POSITRONIUM
POSITRONS
POTASSIUM
S STATES