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Electron exchange model potential: Application to positronium-helium scattering | | P. K. Biswas
; Sadhan K. Adhikari
; | | Date: |
23 Nov 1999 | | Journal: | Phys.Rev. A59 (1999) 363-370 | | Subject: | Atomic and Molecular Clusters; Atomic Physics; Chemical Physics | physics.atm-clus cond-mat nucl-th physics.atom-ph physics.chem-ph quant-ph | | Abstract: | The formulation of a suitable nonlocal model potential for electron exchange is presented, checked with electron-hydrogen and electron-helium scattering, and applied to the study of elastic and inelastic scattering and ionization of ortho positronium (Ps) by helium. The elastic scattering and the $n = 2$ excitations of Ps are investigated using a three-Ps-state close-coupling approximation. The higher ($nge 3$) excitations and ionization of Ps atom are treated in the framework of Born approximation with present exchange. Calculations are reported of phase shifts, and elastic, Ps-excitation, and total cross sections. The present target elastic total cross section agrees well with experimental results at thermal to medium energies. | | Source: | arXiv, physics/9911052 | | Services: | Forum | Review | PDF | Favorites | |
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