Phys. Rev. A 48, 4780 - 4783 (1993)Variational calculation of ground-state energy of positronium negative ions |
Y. K. Ho
Department of Physics and Astronomy, Louisiana State University, Baton Rouge, Louisiana 70803
Received 22 March 1993
The ground-state energy of positronium negative ions, Ps-, is calculated using double-basis-set Hylleraas functions in which four nonlinear parameters are used. The optimized result of E=-0.524 010 140 465 7 Ry obtained by using 744-term function represents the lowest variational energy for Ps- in the literature to date to our knowledge. The wave function is then used to calculate the positron annihilation rate for Ps-.
©1993 The American Physical Society
URL: http://link.aps.org/abstract/PRA/v48/p4780
DOI: 10.1103/PhysRevA.48.4780
PACS: 36.10.Dr, 31.20.Di
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