Spectroscopic investigation of the A and 3 (1)Sigma(+) states of (KRb)-K-39-Rb-85

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By using a combination of molecular beam (MB) excitation spectra and two distinct ultracold molecule excitation spectra (UM+ and UM-), we have assigned high vibrational levels of the A and 3 (1)Sigma(+) states from absorption spectra of the mutually strongly perturbed A (1)Sigma(+) - 3 (1)Sigma(+) - 1 (1)Pi - 2 (3)Sigma(+) - b (3)Pi states of ultracold (KRb)-K-39-Rb-85 molecules in the energy region between 15116 and 16 225 cm(-1) above the minimum of the ground X (1)Sigma(+) state. The ultracold molecules (UM+ and UM-) are formed by radiative decay following photoassociation (PA) to a specific level of the 3(0(+)) state (UM+) or to a specific level of the 3(0(-)) state (UM-). We observe that the A and 3 (1)Sigma(+) states are observable in the UM+ spectra, but absent from the UM-spectra. This is explained by considering Hund's case (c) selection rules and transition dipole moments between the upper excited A (1)Sigma(+) (2(0(+))) state and the three Omega components (0(+), 0(-), and 1) at the ground-state dissociation limit. We propose further investigations of the extended potential wells of the A and 3 (1)Sigma(+) states by combining short-range MB excitation spectra in a narrow Franck-Condon (FC) window near R-e of the X (1)Sigma(+) state, and long-range UM (and PA) excitation spectra, which have much larger FC windows. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4771661]
Publisher
AMER INST PHYSICS
Issue Date
2012-12
Language
English
Article Type
Article
Keywords

RESONANCE POLARIZATION SPECTROSCOPY; PULSED MOLECULAR-BEAM; B-1 PI STATE; ELECTRONIC-STATE; ULTRACOLD MOLECULES; KRB MOLECULE; NM SYSTEM; SPECTRA; ATOMS

Citation

JOURNAL OF CHEMICAL PHYSICS, v.137, no.24

ISSN
0021-9606
DOI
10.1063/1.4771661
URI
http://hdl.handle.net/10203/103685
Appears in Collection
CH-Journal Papers(저널논문)
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