Permanent electric dipoles and Lambda-doubling constants in the lowest (1)Pi states of RbCsстатья
Статья опубликована в высокорейтинговом журнале
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Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
Аннотация:The article presents first experimental data on the Stark induced e-f mixing in the (4) (1)Pi state of the Rb-85 Cs-133 molecule, as well as the ab initio calculations of permanent electric dipole moments (d) in the (1,2,3,4) (1)Pi states and q factors in the (2,4) (1)Pi states. The appearance of the “forbidden” lines in the laser-induced (4) (1)Pi –> X (1)Pi(+) fluorescence spectrum in the presence of an electric field allowed us to obtain, for the rovibronic v’(J’)=2(82) level of the (4) (1)Pi state correlating to the Rb(4d)+Cs(6s) atomic limit, the ratio q/d=0.9 X 10(-7) cm(-1) /D with 20% experimental error. Electronic structure calculations on the ground and excited states of the RbCs molecule were performed in the framework of the Hund’s a-coupling scheme by means of the many-body multipartitioning perturbation theory. The ab initio d(R) estimates revealed large values of about dapproximate to -7 D for the (4) (1)Pi state. The calculated q factor value for the (2) (1)Pi state is in excellent agreement with the literature data. The theoretical estimate of the q/d ratio for the v’(J’)=2(82) level of the (4) (1)Pi state agrees satisfactory well with the present experimental value.