Photodetachment ofK−

Abstract

Eigenchannel R-matrix calculation results are presented for the photodetachment of ${\mathrm{K}}^{\ensuremath{-}}$ in the energy region between the $\mathrm{K}(5s)$ and $\mathrm{K}(7p)$ thresholds. Present results are compared with prior experimental studies, including the recent relative $\mathrm{K}(5s)$ partial cross section measurements of Kiyan et al. [Phys. Rev. A 84, 5979 (2000)], and resonances observed in electron-potassium scattering. Detailed analyses and identifications of ${}^{1}{P}^{o}$ resonance structures are presented. Comparisons with ${\mathrm{H}}^{\ensuremath{-}}$ and other alkali-metal negative ions provide further information on the structure and dynamics of negative ions.