Pure Rotation Spectrum of the HCl Flame

Abstract

Pure rotation lines for $j=17\mathrm{} \mathrm{to} 33$ of the emission spectrum of the HCl flame are measured with a KBr prism. The following empirical formulae are determined to represent two series of lines measured corresponding to pure rotation in the two lowest oscillation states, $N=0, \nu =20.9j-0.00185\mathrm{}{j}^3; N=1, \nu =20.2j-0.00163\mathrm{}{j}^3.$