Measurement of disorientation cross section in the $^{133}$Cs $6p^{2}P_{3/2}$ level by circular polarization spectra*

A measurement of the circular polarization degree of the $6s^{2}S_{1/2}\rightarrow6p^{2}P_{3/2}\rightarrow10s^{2}S_{1/2}$ transition in atomic $^{133}$Cs has been made. The spectra is dependent on both alignment and orientation created by a circularly polarized light in the $6p^{2}P_{3/2}$ level of cesium. The cross section for disorientation of optically oriented $6p^{2}P_{3/2}$ cesium atoms, induced in collisions with argon noble gases have been extracted from the two-photon double-resonance circular polarization spectra. Experimental details and the results will be presented.