Convergent close-coupling calculations of positron-magnesium scattering

Journal Article · Wed Jun 15 00:00:00 EDT 2011 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.83.062709· OSTI ID:21550113

Savage, Jeremy S; Fursa, Dmitry V; Bray, Igor ^[1]

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1. 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, Vol. 83, Issue 6; Other Information: DOI: 10.1103/PhysRevA.83.062709; (c) 2011 American Institute of Physics; ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
COUPLING
ELASTIC SCATTERING
EV RANGE
EXCITATION
IONIZATION
MAGNESIUM
P WAVES
POSITRON-ATOM COLLISIONS
POSITRONIUM
POSITRONS
RESONANCE
TOTAL CROSS SECTIONS
ALKALINE EARTH METALS
ANTILEPTONS
ANTIMATTER
ANTIPARTICLES
ATOM COLLISIONS
COLLISIONS
CROSS SECTIONS
ELEMENTARY PARTICLES
ELEMENTS
ENERGY RANGE
ENERGY-LEVEL TRANSITIONS
FERMIONS
LEPTONS
MATTER
METALS
PARTIAL WAVES
POSITRON COLLISIONS
SCATTERING