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Disorientation and disalignment cross sections of excited Rb-atoms colliding with noble gases
Authors:B Kamke
Institution:1. Physik-Department, Universit?t Marburg, Germany
Abstract:The disorientation and disalignment cross sections for the depolarization of Rb 52P1/2 and 52P3/2 states due to collisions with the inert gases He, Ne, Ar, Kr, Xe were measured at a temperature of 317 K. The experiments were done in a static magnetic field H0 which served to decouple the nuclear spin. Unpolarized Rb-D2-radiation was made incident on the Rb-vapour parallel to H0 thus generating an alignment in the2P3/2-state. The linear polarization of the fluorescent D2-light emitted at right angles towards the incident light beam was measured as a function of the rare gas pressure (0... 3 Torr). Similarly, for the disorientation measurements the vapour was excited by circularly polarized D2- or D1-radiation parallel to H0 and circularly polarized fluorescent light was observed at small angles towards the backward direction. From the decrease of the polarizations observed at rising pressure the cross sections were determined. The comparison with theoretical results gives satisfactory agreement.
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