Spectroscopy ofNa2aΠu3−XΣg+1transitions observed by the laser-induced fluorescence of a molecular beam

Abstract

The line spectrum between the triplet state $a{}_{}{}^3{}_{}{}^{}\Pi _u^{}{}_{}{}^{}$ and the ground state $X{}_{}{}^1{}_{}{}^{}\Sigma _g^{+}{}_{}{}^{}$ of ${\mathrm{Na}}_2$ is observed by the laser-induced fluorescence of a ${\mathrm{Na}}_2$ molecular beam. The rotational constants and vibrational frequencies of the $a{}_{}{}^3{}_{}{}^{}\Pi _u^{}{}_{}{}^{}$ state are determined.