Collision-induced satellite for the asymptotically forbidden transition (42S-52S) of potassium perturbed by neon

A collision-induced satellite correlated to the K 4(2)S-5(2)S forbidden transition perturbed by Ne has been studied both experimentally and theoretically. The experimental absorption profile has been obtained by an LIF technique with its maximum at 4749.1 + or - 0.5 A, and an FWHM of about 7.6 + or - 0.5 A. The corresponding theoretical profile has been derived by a quantum close-coupling calculation, using the available model potential and transition moment, with emphasis on rotational effects. A detailed comparison between experiment and theory shows excellent agreement concerning the width and the shape of the satellite, and a relatively satisfactory agreement concerning its position.