R. Hilger et al., UPPER-BOUND AND LOWER-BOUND HYLLERAAS-CI CALCULATIONS FOR THE NONRELATIVISTIC P-0 STATES OF THE HE-4 ISOTOPE, International journal of quantum chemistry, 66(1), 1998, pp. 25-30
Extensive Hylleraas-CI calculations for the lowest P-o states of He-4
were performed. The dependence of the variational energy values E-kapp
a on the mass parameter kappa given by kappa = m(He2+)/m(e-) discussed
. Furthermore, lower bounds to E-kappa were calculated using variance
minimization. (C) 1998 John Wiley & Sons, Inc.