Formation of ultracold LiRb molecules by photoassociation near the Li(2s 2S1/2) + Rb(5p 2P1/2) asymptote
1 Department of Physics, Purdue University - West Lafayette, IN 47907, USA
2 School of Electrical and Computer Engineering, Purdue University - West Lafayette, IN 47907, USA
Received: 14 August 2013
Accepted: 18 December 2013
We report the production of ultracold 7Li85Rb molecules by photoassociation (PA) below the Li (2s 2S1/2) + Rb(5p 2P1/2) asymptote. We perform PA spectroscopy in a dual-species 7Li-85Rb magneto-optical trap (MOT) and detect the PA resonances using trap loss spectroscopy. We observe several strong PA resonances corresponding to the last few bound states, assign the lines and derive the long-range C6 dispersion coefficients for the Li (2s 2S1/2) + Rb(5p 2P1/2) asymptote. We also report an excited-state molecule formation rate of and a PA rate coefficient of , which are both among the highest observed for heteronuclear bi-alkali molecules. These suggest that PA is a promising route for the creation of ultracold ground-state LiRb molecules.
PACS: 37.10.Mn – Slowing and cooling of molecules / 33.20.-t – Molecular spectra / 34.50.-s – Scattering of atoms and molecules
© EPLA, 2013