Line-profile Analysis of Excitation Spectroscopy in Even 5p⁵(²P_1/2)nl' K'_J (l'=1, 3) Autoionizing Resonances of Xe

The even-parity autoionizing resonance series 5p⁵np'3/2₁, 1/2₁, and 5p⁵nf'5/2₃ of xenon have been investigated, excited from the two metastable states 5p⁵6s3/2₂ and 5p⁵6s'1/2₀ in the photon energy range of 28000-42000 cm^-1 with experimental bandwidth of ～0.1 cm^-1. The excitation spectra of the even-parity autoionizing resonance series show typical asymmetric line shapes. New level energies, quantum defects, line profile indices and resonance widths, resonance lifetimes and reduced widths of the autoionizing resonances are derived by a Fano-type line-shape analysis. The line profile index and the resonance width are shown to be approximately proportional to the effective principal quantum number. The line separation of the 5p⁵np' autoionizing resonances is discussed.