Photoassociative spectroscopy of the Cs2 0-g long-range state

Year: 1999

Authors: Fioretti A., Comparat D., Drag C., Amiot C., Dulieu O., Masnou-Seeuws F., Pillet P.

Autors Affiliation: Laboratoire Aimé Cotton, Université Paris-Sud, Bâtiment 505, 91405 Orsay Cedex, France

Abstract: The photoassociative spectroscopy of the Cs-2 0(g)(-) long-range molecular state dissociating into the 6s S-2(1/2) + 6p P-2(3/2) asymptote is performed, using cold cesium atoms in a vapor-cell magneto-optical trap (MOT). Vibrational levels from v= 0 to v = 132 are identified, and their rotational structure is well resolved up J = 8 for levels below v = 74. These data are analyzed in terms of the Rydberg-Klein-Rees (RKR) procedure, and correspond to 99.6% of an effective potential curve with a minimum at 12.36+/-0.05 Angstrom and a 77.94 +/- 0.01 cm(-1) depth. Both ab initio calculations and simple model estimations predict a double-well structure for this potential curve, which cannot be reproduced presently by the RKR approach but which is confirmed by the presence of giant structures in the spectrum. The 1(u)(6s S-2(1/2) + 6p P-2(3/2)) long-range state is also observed for the first time in Cs-2.

Journal/Review: EUROPEAN PHYSICAL JOURNAL D

Volume: 5 (3)      Pages from: 389  to: 403

KeyWords: Optical cooling of atoms; Molecular spectra; Innteratomic and intermolecular potentials and forces
DOI: 10.1007/s100530050271

Citations: 121
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