TY - JOUR
T1 - A coupled channel study on a binding mechanism of positronic alkali atoms
AU - Kubota, Yoshihiro
AU - Kino, Yasushi
N1 - Copyright:
Copyright 2008 Elsevier B.V., All rights reserved.
PY - 2008/2/25
Y1 - 2008/2/25
N2 - 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.
AB - 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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U2 - 10.1088/1367-2630/10/2/023038
DO - 10.1088/1367-2630/10/2/023038
M3 - Article
AN - SCOPUS:46249123448
VL - 10
JO - New Journal of Physics
JF - New Journal of Physics
SN - 1367-2630
M1 - 023038
ER -