Circular polarization spectroscopy disorientation cross-section in the 133Cs 6p2 P3/2 level by using two-photon two-color nano-second pulsed laser /

by Marhatta, Ramesh.

CIRCULAR POLARIZATION SPECTROSCOPY: DISORIENTATION CROSS-SECTION IN THE 133Cs 6p2P3/2 LEVEL BY USING TWO-PHOTON TWO-COLOR NANO-SECOND PULSED LASER by Ramesh Marhatta We have experimentally investigated the disorientation cross-section of the cesium J = 3/2 excited-level atom by using two-photon two-color nano-second pulsed dye lasers in the presence of argon buffer gas. Alignment and orientation in the 6p2P3/2 level were produced with a circularly polarized light. The circular polarization degree was measured with the pump (? = 852.112 nm) and probe laser (? = 603.409 nm) to obtain disorientation cross-section in the 6p2P3/2 level cesium due to collision with the ground level argon atoms over the Zeeman population. The disorientation cross-section was extracted, using non-linear square fit, from the measured circular polarization spectra as a function of argon gas pressure. We obtained the value of disorientation cross-section as 151(42) ?A2 which matches with the theory.