C Le Sech 1997 J. Phys. B: At. Mol. Opt. Phys. 30 L47 doi:10.1088/0953-4075/30/2/003
Accurate analytic wavefunctions for two-electron atoms
C Le Sech
Show affiliationsLETTER TO THE EDITOR
Simple analytic two variational parameters wavefunctions for the ground state of 
, He, 
, 
, 
atom (ions) are proposed. These functions fulfil the cusp conditions at the singularities of the Coulombic field, and include the correct behaviour for large interparticle separations. The accuracy of the calculated energies is found to be about 
. These functions should be useful for the computation of the cross section of inelastic processes involving two-electron systems.
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Issue 2 (28 January 1997)
Received 16 October 1996
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Accurate analytic wavefunctions for two-electron atoms
C Le Sech 1997 J. Phys. B: At. Mol. Opt. Phys. 30 L47
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