High-lying doubly excited states of H-and He II.1P0states

For pt.I, see ibid., vol.19, no.10, p.L331 (1986). The authors present the energy levels of the doubly excited 1 P 0 states of H - and He which belong to the manifolds of the N=3-7 threshold of H and He + , respectively. They calculate these energies using the hyperspherical coordinate method with a set of basis functions of 100 terms. The energy levels obtained are specified in terms of the supermultiplet classification based on the collective representation of the rovibrator model for the doubly excited states. Their calculated energies are found to be in agreement with other ab initio calculations available at present within an accuracy of a few per cent.