https://doi.org/10.1140/epjd/e2009-00291-5
Autoionization states of the positronium negative ion in exponential cosine-screened Coulomb potentials
1
Institute of Atomic and Molecular Sciences, Academia Sinica, P.O. Box 23-166, Taipei, Taiwan 106
2
Department of Mathematics, Burdwan University, Golapbag, Burdwan 713 104, West Bengal, India
Corresponding author: arijit98@yahoo.com
Received:
21
September
2009
Revised:
10
October
2009
Published online:
17
November
2009
The 
autoionization resonance states of the positronium negative ion (Ps-) in exponential cosine-screened Coulomb potentials (ECSCP) are investigated using stabilization method. Highly correlated wave functions for Ps- are used to take into account the correlation effect of the charged particles. Results for resonance energies and widths are reported for the screening parameter in the range 0.0-0.07 (in a0-1), to the best our knowledge, for the first time in the literature.
PACS: 34.80.Uv – Positron scattering / 36.10.-k – Exotic atoms and molecules / 36.10.Dr – Positronium
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2009
