Abstract
Xenon atoms were produced in their metastable states 5p56s[3/2]2 and 5p56s[1/2]o in a pulsed DC discharge in a beam, and subsequently excited to the even-parity autoionizing Rydberg states 5p5lp[3/2]1,[1/2]1, and 5p5nf [5/2] 3 using single photon excitation. The excitation spectra of the even-parity autoionizing resonance series from the metastable 129Xe were obtained by recording the autoionized Xe+ with time-of-flight ion detection in the photon energy range of 28000-42000 cm1. A wealth of autoionizing resonances were newly observed, from which more precise and systematic spectroscopic data of the level energies and quantum defects were derived.
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