Theoretical study on dielectronic recombination of O6+ ions in metastable states -: art. no. 052704

\A computational scheme, based on the theory of the continuum-bound transitions of Bell and Seaton [J. Phys. B 18, 1589 (1985)] and the close-coupling R-matrix approach, has been developed to treat dielectronic recombination (DR) in high-lying resonance-energy regions. This scheme and our presented numerical method to compute DR in low-lying resonance-energy regions [Phys. Rev. A 62, 022706 (2000)] have been applied together to elucidate the experimental spectra of the DR of O6+ ions in the metastable 1s2s S-3 and 1s2s S-1 states. For comparison. a perturbative theoretical calculation of DR for O6+ has also been accompanied. The reasonable representation of the general dielectronic spectral shape is yielded by both our close-coupling and perturbative calculations. However, both the methods do not reproduce the experimental double-peak structure at -6-8 eV, This shows that the further investigation on DR of this kind of ions is required both experimentally and theoretically.