A coupled channel study on a binding mechanism of positronic alkali atoms

Details A coupled channel study on a binding mechanism of positronic alkali atoms A coupled channel study on a binding mechanism of positronic alkali atoms

Feb 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008njph...10b3038k&link_type=abstract

New Journal of Physics, Volume 10, Issue 2, pp. 023038 (2008).

Physics

1

Scientific paper

In order to investigate the binding mechanism of weakly bound states of positronic alkali atoms, we calculate the energies and wavefunctions using the Gaussian expansion method (GEM) where a positronium (Ps) alkali ion channel and a positron alkali atom channel are explicitly introduced. The energies of the bound states are updated using a model potential that reproduces well the observed energy levels of alkali atoms. The binding mechanism of the positronic alkali atom is analyzed by the wavefunctions obtained. The structure of the positronic alkali atom has been regarded as a Ps cluster orbiting the alkali ion, which is described by the Ps alkali ion channel. We point out that the fraction having the positron alkali atom configuration is small but plays an indispensable role for the weakly bound system.

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