NDLI: The photoassociative spectroscopy, photoassociative molecule formation, and trapping of ultracold $\mathsf{^{39}K^{85}Rb}$

Content Provider	SpringerLink
Author	Wang, D. Qi, J. Stone, M. F. Nikolayeva, O. Hattaway, B. Gensemer, S. D. Wang, H. Zemke, W. T. Gould, P. L. Eyler, E. E. Stwalley, W. C.
Copyright Year	2004
Abstract	We have observed the photoassociative spectra of colliding ultracold 39K and 85Rb atoms to produce KRb* in all eight bound electronic states correlating with the 39K (4s) + 85Rb(5p 1/2 and 5p 3/2) asymptotes. These electronically excited KRb* ultracold molecules are detected after their radiative decay to the metastable triplet (a $^{3}\Sigma^{ + })$ state and (in some cases) the singlet (X $^{1}\Sigma^{ + })$ ground state. The triplet (a $^{3}\Sigma^{ + })$ ultracold molecules are detected by two-photon ionization at 602.5 nm to form KRb + , followed by time-of-flight mass spectroscopy. We are able to assign a majority of the spectrum to three states (2(0 + ), 2(0-), 2(1)) in a lower triad of states with similar C 6 values correlating to the K(4s) + Rb (5p 1/2) asymptote; and to five states in an upper triad of three states (3(0 + ), 3(0-), 3(1)) and a dyad of two states (4(1), 1(2)), with one set of similar C 6 values within the upper triad and a different set of similar C 6 values within the dyad. We are also able to make connection with the short-range spectra of Kasahara et al. [J. Chem. Phys. 111, 8857 (1999)], identifying three of our levels as v = 61, 62 and 63 of the 1 $^{1}\Pi \sim $ 4(1) state they observed. We also argue that ultracold photoassociation to levels between the K(4s) + Rb (5p 3/2) and K(4s) + Rb (5p 1/2) asymptotes may be weakly or strongly predissociated and therefore difficult to observe by ionization of a $^{3}\Sigma^{ + }$ (or X $^{1}\Sigma^{ + })$ molecules; we do know from Kasahara et al. that levels of the 1 $^{1}\Pi \sim $ 4(1) and 2 $^{1}\Pi \sim $ 5(1) states in the intra-asymptote region are predissociated. A small fraction ( $\le $ 1/3) of the triplet (a $^{3}\Sigma^{ + })$ ultracold molecules formed are trapped in the weak magnetic field of our magneto-optical trap (MOT).
Starting Page	165
Ending Page	177
Page Count	13
File Format	PDF
ISSN	14346060
Journal	The European Physical Journal D - Atomic, Molecular, Optical and Plasma Physics
Volume Number	31
Issue Number	2
e-ISSN	14346079
Language	English
Publisher	Springer-Verlag
Publisher Date	2004-01-01
Publisher Place	Berlin, Heidelberg
Access Restriction	Subscribed
Subject Keyword	Nanotechnology Quantum Physics Quantum Computing, Information and Physics Nonlinear Dynamics, Complex Systems, Chaos, Neural Networks Atoms, Molecules, Clusters and Plasmas Solid State Physics and Spectroscopy
Content Type	Text
Resource Type	Article
Subject	Atomic and Molecular Physics, and Optics

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Long distance magnetic conveyor for precise positioning of ultracold atoms

Electron attachment to strongly polar clusters : Formamide molecule and clusters

The photoassociative spectroscopy, photoassociative molecule formation, and trapping of ultracold $\mathsf{^{39}K^{85}Rb}$

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