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Cs2 spectroscopy by photo-association of laser cooled cesium

Objective



The accuracy of the resonance of a photo-associative collision is essentially given by the relative kinetic energy of colliding species, which varies from a few thousand Gigahertz at ordinary temperature to a few Megahertz for cesium cooled atoms. By using Cs cold atoms obtained in a Magneto-Optical Trap (MOT), we will develop a high resolution spectroscopy of long range molecular states of Cs2. In a cesium MOT, the photo-associative collisional process of two free cesium atoms in the dimer molecule Cs2*, in a rotovibrational excited state, will be realized by a first laser. Signature of photo-associative process will be obtained by photo-ionization of Cs2 in Cs2+ using a second leser. The ions will be selectively detected through a time-of-flight mass spectrometer. The theoretical interpretation of the spectroscopic lines will give access to the long range molecular potential curves of Cs2.

Coordinator

CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE
Address
Campus D'orsay, Bètiment 505
91405 Orsay
France

Participants (1)

Not available
Italy