Experimental versus theoretical rates for photoassociation and for formation of ultracold molecules

We report on the spectra of the long-range attractive molecular states of the Cs/sub 2/ dimer below the dissociation limits 6s+6p/sub 1/2/ and 6s+6p/sub 3/2/ which are accessible by molecular photoassociation of cold Cs atoms. For the states O/sub u//sup +/ and O/sub g//sup -/(6s+6p/sub 3/2/), we ha...

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Bibliographic Details
Published in:IEEE journal of quantum electronics 2000-12, Vol.36 (12), p.1378-1388
Main Authors: Drag, C., Tolra, B.L., Dulieu, O., Comparat, D., Vatasescu, M., Boussen, S., Guibal, S., Crubellier, A., Pillet, P.
Format: Article
Language:English
Subjects:
Atom lasers
Atomic beams
Atomic measurements
Cold working
Decay
Dimers
Electron traps
Energy resolution
Excitation
Gas lasers
Laser excitation
Mathematical analysis
Performance evaluation
Quantum electronics
Resonance
Spectra
Spectroscopy
Spontaneous
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Summary:We report on the spectra of the long-range attractive molecular states of the Cs/sub 2/ dimer below the dissociation limits 6s+6p/sub 1/2/ and 6s+6p/sub 3/2/ which are accessible by molecular photoassociation of cold Cs atoms. For the states O/sub u//sup +/ and O/sub g//sup -/(6s+6p/sub 3/2/), we have performed trap-loss measurements, which are in good agreement with the theoretical calculations, performed in a perturbative approach. For the O/sub g//sup -/ and 1/sub u/(6s+6p/sub 3/2/) states, we observe, after spontaneous decay of the electronically excited molecules, the formation of translationally cold molecules. A rate of formation of cold molecules of the order of /spl sim/10/sup 6/ molecules per second is obtained in the case of the state O/sub g//sup /.
ISSN:0018-9197
1558-1713
DOI:10.1109/3.892556