Theoretical study on dielectronic recombination of O ions in metastable states

Zhao, L.-B.*; Shirai, Toshizo

Physical Review A, 64(5), p.052704_1 - 052704_6, 2001/11

https://doi.org/10.1103/PhysRevA.64.052704

A computational scheme, based on the theory of continuum-bound transitions of Bell and Seaton [J. Phys. B , 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 , 022706 (2000)] have been applied together to elucidate the experimental spectra of DR of O ions in the metastable and states. For comparison, a perturbative theoretical calculation of DR for O 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.