Convergent close-coupling calculations of positron-magnesium scattering
MetadataShow full item record
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 1P, 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.
Showing items related by title, author, creator and subject.
Utamuratov, Ravshanbek (2010)This thesis presents the theoretical studies of positron scattering on the helium atom using two-center Convergent Close-Coupling (CCC) theory.The thesis organized in the following way: In the Introduction (Chapter I) the ...
McMahon, Darryl (2018)The wave properties for a one dimensional periodic structure are related to the eigenvalues and eigenvectors of two pairs of 2x2 matrices M and N, E and G. M is the complex scattering matrix of coherent waves by a single ...
McMahon, Darryl (2015)This paper explores the possibility of generalised periodic structure waves (PSW) that include the well-known Bloch-Floquet (BF) waves as a special case. We consider two types of structure waves (SW) in an infinite, ...