### Abstract

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 =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.

Original language | English |
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Pages (from-to) | 173001-173005 |

Number of pages | 5 |

Journal | Physical Review Letters |

Volume | 98 |

Issue number | 17 |

Publication status | Published - 2007 |

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## Cite this

Mitroy, J., & Bromley, M. (2007). Generating phase shifts from pseudostate energy shifts.

*Physical Review Letters*,*98*(17), 173001-173005.