Line shape analysis of two-colour photoassociation spectra on the example of the Cs2 ground state
Laboratoire Aimé Cotton, CNRS, bâtiment 505, Campus d'Orsay, 91405 Orsay Cedex, France
Published online: 15 October 2002
Two-photon photoassociation spectra in a Λ-type excitation scheme are analysed under the systematically varied experimental conditions of frequency detunings and laser intensities. Line shape fits are presented as well as the investigation of intensity and detuning dependent line shifts. From both we determine the attained spectroscopic precision, that is corrected for a systematic line shift due to the thermal distribution of atoms in the trap. An energy correction for this effect is given. Information about the feasibility of generating translationally cold molecules in a well defined rotational and vibrational level by the photoassociation process is derived from the analysis.
PACS: 33.70.Jg – Line and band widths, shapes, and shifts / 32.80.Pj – Optical cooling of atoms; trapping / 34.50.Rk – Laser-modified scattering and reactions
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2002