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Cold cesium molecules: from formation to cooling

  Articoli su Riviste JCR/ISI  (anno 2009)

Autori:  Fioretti A., Sofikitis D., Horchani R., Li X., Pichler M., Weber S., Allegrini M., Chatel B., Comparat D., Pillet P

Affiliazione Autori:  Laboratoire Aimé Cotton, CNRS, Université Paris-Sud, 91405 Orsay, France; Department of Physics, Goucher College, Baltimore, MD 21204, USA; Laboratoire Collisions, Agrégats, Réactivité, UMR 5589, CNRS, Université Paul Sabatier Toulouse 3, IRSAMC, Toulouse, France; CNISM, Dipartimento di Fisica, Università di Pisa, Largo Pontecorvo, 3 56127 Pisa, Italy

Riassunto:  Recent experiments on formation of translationally cold ground state molecules, their subsequent broadband vibrational cooling and study of rotations are presented together with the related modeling. We produce cold molecules by photoassociating pairs of cold cesium atoms that can decay into ground state molecules in different vibrational levels. Then we laser cool the vibrational degree of freedom by selecting a single target vibrational level. Our method is based on repeated optical pumping by laser light with a spectrum broad enough to excite all populated vibrational levels but limited in its frequency bandwidth with a spatial light modulator. In such a way we are able to eliminate transitions from the selected level, in which molecules accumulate. Results for vibrational cooling into the nu = 0, nu = 1, nu = 2 and nu = 7 level of the singlet X(1)Sigma(g) ground electronic state are presented. Depletion spectroscopy is performed to study the rotational distribution of the created molecules. In the theoretical modeling of the process we are able to reproduce our results and investigate the prospects for a \'complete\' cooling of molecules, including also their rotational degree of freedom.

Volume n.:  56 (18-19)      Pagine da: 2089  a: 2099
DOI: 10.1080/09500340903156822

*Impact Factor della Rivista: (2009) 0.942   *Citazioni: 8
data tratti da "WEB OF SCIENCE" (marchio registrato di Thomson Reuters) ed aggiornati a:  19/05/2019

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