Convergent close-coupling calculations of positron-magnesium scattering
- ARC Centre for Antimatter-Matter Studies, Curtin University of Technology, GPO Box U1987, Perth, WA 6845 (Australia)
The single-center convergent close-coupling method has been applied to positron-magnesium scattering at incident energies from 0.01 to 100 eV. Cross sections are presented for elastic scattering and excitation of 3 {sup 1}P, as well as for the total ionization and total scattering processes. We also provide an estimate of the positronium formation cross section. The results agree very well with the measurements of the total cross section by Stein et al. [Nucl. Instrum. Methods Phys. Res. Sect. B 143, 68 (1998)], and consistent with the positronium formation measurements of Surdutovich et al. [Phys. Rev. A 68, 022709 (2003)] for positron energies above the ionization threshold. For energies below the positronium formation threshold (0.8 eV) we find a large P-wave resonance at 0.17 eV. A similar resonance behavior was found by Mitroy and Bromley [Phys. Rev. Lett. 98, 173001 (2007)] at an energy of 0.1 eV.
- OSTI ID:
- 21550113
- Journal Information:
- Physical Review. A, Journal Name: Physical Review. A Journal Issue: 6 Vol. 83; ISSN 1050-2947; ISSN PLRAAN
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ALKALINE EARTH METALS
ANTILEPTONS
ANTIMATTER
ANTIPARTICLES
ATOM COLLISIONS
COLLISIONS
COUPLING
CROSS SECTIONS
ELASTIC SCATTERING
ELEMENTARY PARTICLES
ELEMENTS
ENERGY RANGE
ENERGY-LEVEL TRANSITIONS
EV RANGE
EXCITATION
FERMIONS
IONIZATION
LEPTONS
MAGNESIUM
MATTER
METALS
P WAVES
PARTIAL WAVES
POSITRON COLLISIONS
POSITRON-ATOM COLLISIONS
POSITRONIUM
POSITRONS
RESONANCE
SCATTERING
TOTAL CROSS SECTIONS