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S-, P- and D-wave resonances in positronium-sodium and positronium-potassium scattering | | Sadhan K. Adhikari
; Puspajit Mandal
; | | Date: |
13 Mar 2001 | | Journal: | J. Phys. B 34 (2001) 1361-1367 | | Subject: | Atomic Physics; Atomic and Molecular Clusters; Chemical Physics | physics.atom-ph physics.atm-clus physics.chem-ph | | Abstract: | Scattering of positronium (Ps) by sodium and potassium atoms has been investigated employing a three-Ps-state coupled-channel model with Ps(1s,2s,2p) states using a time-reversal-symmetric regularized electron-exchange model potential fitted to reproduce accurate theoretical results for PsNa and PsK binding energies. We find a narrow S-wave singlet resonance at 4.58 eV of width 0.002 eV in the Ps-Na system and at 4.77 eV of width 0.003 eV in the Ps-K system. Singlet P-wave resonances in both systems are found at 5.07 eV of width 0.3 eV. Singlet D-wave structures are found at 5.3 eV in both systems. We also report results for elastic and Ps-excitation cross sections for Ps scattering by Na and K. | | Source: | arXiv, physics/0103035 | | Services: | Forum | Review | PDF | Favorites | |
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