Knowledge Bank

Two new far infrared bands of $Ar-NH3$ have been measured that share a common lower state with the band previously measured in our $lab1$. These three bands have all been assigned as transitions originating from the ground $state2$. One has been assigned as the first van der Waals stretching transition. The other two have been assigned as transitions to the levels resulting from the splitting of the js-1, k-0 rotational state of free $NH3$ due to the anisotropic potential, as suggested by B.J. $Howard3$. An analysis using a least squares fit to an analytical form for the intermolecular potential has been carried out.