Show simple item record

dc.creatorPechkis, H. K.en_US
dc.creatorWang, D.en_US
dc.creatorHuang, Y.en_US
dc.creatorEyler, E. E.en_US
dc.creatorGould, P. L.en_US
dc.creatorStwalley, W. C.en_US
dc.creatorKoch, C. P.en_US
dc.date.accessioned2008-01-12T14:00:19Z
dc.date.available2008-01-12T14:00:19Z
dc.date.issued2007en_US
dc.identifier2007-RJ-04en_US
dc.identifier.urihttp://hdl.handle.net/1811/31494
dc.descriptionAuthor Institution: Physics Department, University of Connecticut, Storrs, CT 06269; Institut fur Theoretische Physik, Freie Universitat Berlin, 14195 Berlin, Germanyen_US
dc.description.abstractWe describe experimental and theoretical studies of the effects of resonant electronic state coupling on the formation of ultracold ground-state $^{85}$Rb$_2$. The molecules are formed by photoassociation of ultracold atoms in a MOT into the 0$_u^+$ state converging to the $5S+5P_{1/2}$ limit, followed by radiative decay into high vibrational levels of the ground electronic state, $X\ ^1\Sigma_g^+$. The populations of these high-$v$ ground-state levels are monitored by resonance-enhanced two-photon ionization (R2PI) through the $2\ ^1\Sigma_u^+$ state. We find that the populations of vibrational levels $v''$=112-116 are far larger than can be accounted for by the Franck-Condon factors for $0_u^+ \leftarrow X\ ^1\Sigma_g^+$ transitions. Further, the total number of ground-state molecules formed by this process exhibits oscillatory behavior as the PA laser is tuned through a succession of $0_u^+$ state vibrational levels. Both of these effects are explained by a new calculation of transition amplitudes that includes the resonant character of the spin-orbit coupling between the two $0_u^+$ states converging to the $5P_{1/2}$ and $5P_{3/2}$ limits. The resulting enhancement of more deeply bound ground-state molecule formation will be useful for future experiments on ultracold molecules. \vspace{12 pt} We also describe evidence from our R2PI spectra for extensive singlet-triplet mixing between excited states of Rb$_2$ at intermediate internuclear separations, apparently also induced by spin-orbit interactions. In particular, the $3\ ^1\Sigma_g^+$ and $1\ ^1\Delta_g$ states converging to $5s+4d$ have been observed in excitation from the $a\ ^3\Sigma_u^+$ state,}, 261 (2006).} and the $2\ ^3\Pi_u$ state has been observed in excitation from the $X\ ^1\Sigma_g^+$ state.en_US
dc.language.isoEnglishen_US
dc.publisherOhio State Universityen_US
dc.titleRESONANCE-ENHANCED PHOTOASSOCIATIVE FORMATION OF GROUND-STATE Rb$_2$ AND SPECTROSCOPY OF MIXED-CHARACTER EXCITED STATESen_US
dc.typearticleen_US


Files in this item

Thumbnail
Thumbnail
Thumbnail
Thumbnail
Thumbnail
Thumbnail
Thumbnail
Thumbnail
Thumbnail
Thumbnail
Thumbnail
Thumbnail
Thumbnail
Thumbnail
Thumbnail
Thumbnail
Thumbnail
Thumbnail
Thumbnail
Thumbnail
Thumbnail
Thumbnail
Thumbnail
Thumbnail
Thumbnail

Items in Knowledge Bank are protected by copyright, with all rights reserved, unless otherwise indicated.

This item appears in the following Collection(s)

Show simple item record