Multiple light scattering on the F = 1 - F' = 0 transition in a cold and high density 87Rb vapor

We report an experimental study of near resonance light scattering on the $F = 1 \rightarrow F’ = 0$componentofthe$D_2$lineinatomic$^{87}Rb$. Experiments are performed on spatially bi-Gaussian ultracold gas samples having peak densities ranging from about $5\cdot {10}^{12}-5\cdot {10}^{13}$ atoms/cm${}^3$ and for a range of resonance saturation parameters and detunings from atomic resonance. Time resolution of the scattered light intensity reveals dynamics of multiple light scattering, optical pumping, and saturation effects. The experimental results in steady-state are compared qualitatively with theoretical models of the light scattering process. The steady-state line shape of the excitation spectrum is in good qualitative agreement with these models.