Broadening, shift and depolarization of the second resonance doublet of potassium perturbed by rare gases

The depolarization, broadening and shift constants of the K 5 2P→4 2S resonance line perturbed by rare gases are calculated in a coupled treatment taking into account rotational and fine structure effects in the frame of the semi-classical approximation for T=450 K. Pascale and Vandeplanque interatomic potentials are used and a rectilinear trajectory is assumed in the calculations. Results are discussed. Some unusual features should be removed in a quantal treatment and further experimental tests would be welcome