Determination of the Cs{sub 2} 0{sub g}{sup -}(P{sub 3/2}) potential curve and of Cs 6P{sub 1/2,3/2} atomic radiative lifetimes from photoassociation spectroscopy

摘要: An analytical expression for the external well of ${\mathrm{Cs}}_{2}{0}_{g}^{\ensuremath{-}}{(6s+6P}_{3/2})$ double-well potential curve is derived, involving asymptotic parameters fitted on spectrum obtained from photoassociation ultracold cesium atoms and molecule formation [Fioretti et al., Europhys. J. D 5, 389 (1999)]. The results are compared to a previous Rydberg-Klein-Rees determination our group, may have consequences triplet scattering length. Values radiative lifetimes ${\ensuremath{\tau}}_{3/2}=30.462(3)$ ns ${\ensuremath{\tau}}_{1/2}=34.88(2)$ ${6P}_{3/2}$ ${6P}_{1/2}$ atomic levels, respectively, extracted with an accuracy better than determinations. method Derevianko Porsev [Phys. Rev. A 65, 053403 (2002)], allows derivation improved value van der Waals coefficient ground-state molecule, ${C}_{6}^{6s}=6828(19)$ a.u.