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Resonance states of helium in exponential cosine-screened Coulomb potentials

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, , Citation Arijit Ghoshal and Y K Ho 2009 J. Phys.: Conf. Ser. 194 152023 DOI 10.1088/1742-6596/194/15/152023

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1 Institute of Atomic and Molecular Sciences, Academia Sinica, PO Box 23-166, Taipei, Taiwan 106, R.O.C

2 Permanent affiliation: Department of Mathematics, Burdwan University, Burdwan 713 104, West Bengal, India

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1742-6596/194/15/152023

Abstract

We have made a first investigation on the 2s2 1Se autoionization resonance of helium (He) in exponential cosine-screened Coulomb potential (ECSCP). Highly correlated wave functions have been used to take into account the correlation effect of the charged particles. Resonance energies and widths for the doubly excited He in ECSCP have been determined using the stabilization method. We report results for the resonance energies and widths for screening parameter in the range 0.0 – 0.275 a.u.

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10.1088/1742-6596/194/15/152023