Shi, Yongqi Scholtes, Theo Grujić, Zoran D. Lebedev, Victor Dolgovskiy, Vladimir Weis, Antoine 2018-01-24 We have performed quantitative measurements of the variation of the on-resonance absorption coefficients κ0 of the four hyperfine components of the Cs D1 transition as a function of laser power P, for pumping with linearly and with circularly polarized light. Sublevel populations derived from rate equations assuming isotropic population relaxation (at a rate γ1) yield algebraic κ0(P) dependences that do not reproduce the experimental findings from Cs vapor in a paraffin-coated cell. However, numerical results that consider spin-exchange relaxation (at a rate γse) and isotropic relaxation fit the experimental data perfectly well. The fit parameters, viz., the absolute value of κ0, the optical pumping saturation power Psat, and the ratio γse/γ1, are well described by the experimental conditions and yield absolute values for γ1 and γse. The latter is consistent with the previously published Cs-Cs spin-exchange relaxation cross section. application/pdf https://folia.unifr.ch/global/documents/306293 https://folia.unifr.ch/documents/306293/files/wei_qso.pdf eng info:eu-repo/semantics/altIdentifier/doi/10.1103/PhysRevA.97.013419 info:eu-repo/semantics/openAccess License undefined Physical Review A. - 2018, vol. 97, no. 1, p. 013419 info:eu-repo/classification/udc/53 Quantitative study of optical pumping in the presence of spin-exchange relaxation http://purl.org/coar/resource_type/c_6501