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
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
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DOI：
10.1103/physreva.66.052506
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发表时间：
2002-11
影响因子：
2.9
通讯作者：
C. Amiot;O. Dulieu;R. Gutterres;F. Masnou-Seeuws
中科院分区：
文献类型：
--
作者：
C. Amiot;O. Dulieu;R. Gutterres;F. Masnou-Seeuws
An analytical expression for the external well of the Cs{sub 2} 0{sub g}{sup -}(6s+6P{sub 3/2}) double-well potential curve is derived, involving asymptotic parameters fitted on the spectrum obtained from photoassociation of ultracold cesium atoms and ultracold molecule formation [Fioretti et al., Europhys. J. D 5, 389 (1999)]. The results are compared to a previous Rydberg-Klein-Rees determination from our group, and may have consequences on the determination of cesium triplet scattering length. Values for radiative lifetimes {tau}{sub 3/2}=30.462(3) ns and {tau}{sub 1/2}=34.88(2) ns of the 6P{sub 3/2} and 6P{sub 1/2} atomic levels, respectively, are extracted with an accuracy better than previous determinations. The method of Derevianko and Porsev [Phys. Rev. A 65, 053403 (2002)], allows the derivation of an improved value for the van der Waals coefficient of ground-state cesium molecule, C{sub 6}{sup 6s}=6828(19) a.u.
An analytical expression for the external well of the Cs{sub 2} 0{sub g}{sup -}(6s+6P{sub 3/2}) double-well potential curve is derived, involving asymptotic parameters fitted on the spectrum obtained from photoassociation of ultracold cesium atoms and ultracold molecule formation [Fioretti et al., Europhys. J. D 5, 389 (1999)]. The results are compared to a previous Rydberg-Klein-Rees determination from our group, and may have consequences on the determination of cesium triplet scattering length. Values for radiative lifetimes {tau}{sub 3/2}=30.462(3) ns and {tau}{sub 1/2}=34.88(2) ns of the 6P{sub 3/2} and 6P{sub 1/2} atomic levels, respectively, are extracted with an accuracy better than previous determinations. The method of Derevianko and Porsev [Phys. Rev. A 65, 053403 (2002)], allows the derivation of an improved value for the van der Waals coefficient of ground-state cesium molecule, C{sub 6}{sup 6s}=6828(19) a.u.