Energies and Auger widths of the high-lying double-excited states for Be-like neon

Energies and Auger widths of high-lying doubly-excited states 1[s.sub.2]3lnl' (n = 3-6) for Be-like neon are calculated using a saddle-point variational method and saddle-point complex-rotation method. The relativistic corrections and mass polarization are obtained with first-order perturbation theory. The configuration structure of the high-lying doubly-excited series is checked by relativistic perturbation corrections. The oscillator strengths and radiative transition probabilities are also calculated. Our results of energies and Auger widths are compared with the available theoretical results in the literature. Auger channel energies are compared with those from high-resolution electron spectroscopy. Excellent agreement is obtained in each state. PACS Nos: 31.30jc, 32.80.Zb, 32.70.Cs, 31.10.+z Dans le cadre de la methode variationnelle du point selle et de la methode de rotation complexe du point selle, nous calculons les energies et largeurs Auger d'etats de haute energie doublement excites 1[s.sub.2]3lnl' (n = 3-6) des ions de neon de type Be. Nous calculons les corrections relativistes et la polarisation de masse a l'aide de la theorie des perturbations au premier ordre. Nous calculons aussi les forces d'oscillateur et les probabilites de transition radiative. Nos resultats sur les energies et les largeurs Auger sont compares aux donnees theoriques disponibles dans la litterature. Les energies des canaux Auger sont comparees avec les resultats de la spectroscopie electronique de haute precision. Nous observons un excellent accord pour chaque etat. [Traduit par la Redaction]
1. Introduction The high-lying doubly-excited states for Be-like ions, where two electrons are excited from the ground states and remain far away outside the closed 1[s.sub.2] core, are an ideal [...]