Partial autoionisation widths of ^2S+1L^o doubly excited O⁶⁺ states associated with N = 3 and 4, O⁷⁺ threshold

The resonance positions and total and partial widths of some ^2s+1L° doubly excited autoionizing states of helium-like oxygen ions O⁶⁺ converging on n = 3 and n = 4 hydrogenic thresholds are reported for L = 1, 2, 3, 4 and 5. The calculation was made in the framework of the diagonalisation method approximation in the LS coupling scheme. The partial widths for multi-channel autoionizing levels to sublevels of O⁷⁺ were calculated by neglecting the direct coupling between the open channels. (paper)