Highresolution optogalvanic study of the c_{4}(0) ^{1}Π _{u}, c' _{5}(0) ^{1}Σ _{u}^{+}, and a″(0) ^{1}Σ _{g}^{+} Rydberg states of N _{2}
Abstract
A new optogalvanic technique with an rf discharge was applied to a highresolution study of the Rydberg states of N _{2}. The Ledbetter band, c_{4}(0) ^{1}Π _{u} ← a″(0) ^{1}Σ _{g}^{+}, and a new visible band, c' _{5}(0) ^{1}Σ _{u}^{+} ← a″(0) ^{1}Σ _{g}^{+}, were studied at a Dopplerlimited resolution of 0.05 cm ^{1}. A Dopplerfree method was also applied to resolve overlapped lines. Precise wavenumbers were determined for the rotational transitions of the two Rydberg bands. The rotational and the centrifugal constants for the lowest Rydberg state, a″(0) ^{1}Σ _{g}^{+}, were determined to be B_{0} = 1.913748(42) cm ^{1} and D_{0} = 6.088(99) × 10 ^{6} cm ^{1}, where the numbers in parentheses are the standard deviation and apply to the last digits.
 Publication:

Journal of Molecular Spectroscopy
 Pub Date:
 June 1982
 DOI:
 10.1016/00222852(82)901783
 Bibcode:
 1982JMoSp..93..423S