https://doi.org/10.1007/s100530050271
Photoassociative spectroscopy of the Cs2 0g- long-range state
Laboratoire Aimé Cotton (CNRS II) , Université Paris-Sud,
Bâtiment 505, 91405 Orsay Cedex, France
Received:
20
May
1998
Revised:
1
August
1998
Accepted:
5
November
1998
Published online: 15 March 1999
The photoassociative spectroscopy of the Cs2
long-range
molecular state dissociating into the 
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 
Å and a
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 
()
long-range state is also observed for the first time in Cs2.
PACS: 32.80.Pj – Optical cooling of atoms; trapping / 33.20.-t – Molecular spectra / 34.20.-b – Interatomic and intermolecular potentials and forces, potential energy surfaces for collisions
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 1999
