Large dimension Configuration Interaction calculations of positron binding to the group II atoms

Details Large dimension Configuration Interaction calculations of positron binding to the group II atoms Large dimension Configuration Interaction calculations of positron binding to the group II atoms

2006-01-09

arxiv.org/abs/physics/0601052v1

Phys.Rev.A 73 032507 (2006)

Physics

Atomic Physics

13 pages, no figs, revtex format, Submitted to PhysRevA

Scientific paper

10.1103/PhysRevA.73.032507

The Configuration Interaction (CI) method is applied to the calculation of the structures of a number of positron binding systems, including e+Be, e+Mg, e+Ca and e+Sr. These calculations were carried out in orbital spaces containing about 200 electron and 200 positron orbitals up to l = 12. Despite the very large dimensions, the binding energy and annihilation rate converge slowly with l, and the final values do contain an appreciable correction obtained by extrapolating the calculation to the l to infinity limit. The binding energies were 0.00317 hartree for e+Be, 0.0170 hartree for e+Mg, 0.0189 hartree for e+Ca, and 0.0131 hartree for e+Sr.

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