Infrared diode laser spectroscopic study of the active nitrogen. The electronic transition between the lowest singlet metastable statesathinsp;1Pgr;gndash;arsquo;thinsp;1Sgr;minus;u, 0ndash;0 band

摘要

Theathinsp;1Pgr;gndash;arsquo;thinsp;1Sgr;minus;u, 0ndash;0 band of the molecular nitrogen was observed in an electric discharge plasma of nitrogen using infrared diode laser spectroscopy at Dopplerhyphen;limited resolution. Precise values were obtained for the rotational constants and the energy separation between the two electronic states. The effect of Lgr;hyphen;type doubling in theathinsp;1Pgr;gstate was observed as small shifts ofQbranch andP/Rbranch transitions to higher and lower frequencies, respectively, than those expected if Lgr; doubling were absent.