Knowledge Bank

We present measurements of the broadening coefficient of absorption lines from the $\nu 1$ and $\nu 3$ bands of $H2S$ in the wavenumber region between $2690cm-1$ and $2765cm-1$ measured with a diode laser spectrometer. These bands are of great interest because of the strong Coriolis interaction between the $\nu 1$ and $\nu 3$ bands as well as between the $2\nu 2$ and $\nu 3$ bands and additionally the Fermi interaction between the $2\nu 2$ and $\nu 1$ bands. Due to the weakness of these bands we had to apply a Herriott multipass cell with a path length of 4.7 m. The study includes 24 lines of the $\nu 1$ band with $3\le J\prime \prime \le 17,0\le Ka\prime \prime \le 7$ and 6 lines of the $\nu 3$ band with $3\le J\prime \prime \le 7,1\le Ka\prime \prime \le 7$. As perturbers we used $H2S,N2$, air, He, Ne, Ar, Kr, and Xe. We will discuss the quantum number dependence of the broadening coefficients and compare the results with those in the case of $SO2$ where only weak interactions occur.