Large-dimension configuration-interaction calculations of positron binding to the group-II atoms
نویسندگان
چکیده
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 =12. Despite the very large dimensions, the binding energy and annihilation rate converge slowly with , and the final values do contain an appreciable correction obtained by extrapolating the calculation to the → 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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