Results from new laser excitation spectra of 20Ne2 have been combined with previously published experimental and theoretical data to provide a consistent picture describing many of the Rydberg states observed below the first ionization limit. These states are found to fall mainly into Rydberg series converging on the ...3σu Χ 2Σu+ ground core of Ne2 +. Spectral data for the npσ 3Σ g+ and npπ 3Πg ← α 3Σu+ and npπ 3Πg ← α 3Σu+ series support the current assignments of the upper states. Although (0-0) bands dominate these series, other vibronic transitions are observed. The 6-23pσ 3Σg+ -α(0-0) bands are more perturbed than the npπ 3Π g -α(0-0) series; hence, data for 4-17pπ 3Πg+ -α (0-0) and 4-6fλ( 3Σg+ , 3Πg +)-α(0-0) were used to determine a value of 34 409 ± 2 cm -1 for the lowest ionization limit of 20Ne2. Rotational constants for the ν = 0 levels of 4-17pi; 3Π g and 10-23pσ 3Σg+also are presented.
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Physical and Theoretical Chemistry