Abstract
Direct solution of the Schrödinger equation for resonant S states of the Helium atom is obtained with the help of the complex rotation method (which reduces the resonant problem to that of bound states) and the correlation function hyperspherical harmonic method (CFHHM). In the CFHH method the bound state solution is a product of a correlation function and of a smooth factor expanded into hyperspherical harmonic functions. Given a proper correlation function, chosen from physical considerations, the method generates resonant wave functions, accurate in the whole range of interparticle distances. Calculated energies are compared to those obtained by variational and other precise computations.
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