Phys. Rev. Lett. 98, 173001 (2007) [4 pages]Generating Phase Shifts from Pseudostate Energy ShiftsReceived 28 November 2006; published 23 April 2007 A simple way to generate low energy phase shifts for elastic scattering using bound-state calculations is postulated, validated, and applied to the problem of e+-Mg scattering. The essence of the method is to use the energy shift between a small reference calculation and the largest possible calculation of the lowest energy pseudostate to tune a semiempirical optical potential. The ℓ=1 partial wave for e+-Mg scattering is predicted to have a shape resonance at an energy of about 0.13 eV. The value of Zeff at the center of the resonance is about 1500. © 2007 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.98.173001
DOI:
10.1103/PhysRevLett.98.173001
PACS:
31.25.Jf, 03.65.Nk, 34.80.Bm, 34.85.+x
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