Spectroscopic data, spin-orbit functions, and revised analysis of strong perturbative interactions for the A {sup 1{Sigma}+} and b {sup 3{Pi}} states of RbCs

Journal Article · Thu Apr 15 00:00:00 EDT 2010 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.81.042511· OSTI ID:21408600

Docenko, O; Tamanis, M; Ferber, R ^[1]; Bergeman, T ^[2]; Kotochigova, S ^[3]; Stolyarov, A V ^[4]; Faria Nogueira, Andreia de; Fellows, C E ^[5]

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1. Laser Center, University of Latvia, 19 Rainis Boulevard, Riga LV-1586 (Latvia)
2. Department of Physics and Astronomy, SUNY, Stony Brook, New York 11794-3800 (United States)
3. Department of Physics, Temple University, Philadelphia, Pennsylvania 11922 (United States)
4. Department of Chemistry, Moscow State University, GSP-2 Leninskie gory 1/3, Moscow 11992 (Russian Federation)
5. Laboratorio de Espectroscopia e Laser, Universidade Federal Fluminense, Campus da Boa Viagem, Niteroi, RJ 24210-340 (Brazil)

The current interest in producing ultracold RbCs molecules by optical excitation from weakly bound Feshbach resonances and stimulated decay to the absolute ground state requires detailed analyses of the intermediate excited states. In this study, we present two sets of experimental Fourier-transform spectroscopic data of the A {sup 1{Sigma}+}-b {sup 3{Pi}} complex. The A-b mixed vibrational levels are the most likely candidates to be intermediates in the molecular formation. The more recent and more accurate data set is from mixed A-b{yields}X transitions, while the second is derived in large part from (4) {sup 1{Sigma}+{yields}}A-b emission and extends to higher A-b energy levels. From a detailed analysis of the spectroscopic data we obtain term values which allow one to construct potentials and spin-orbit functions. Vibrational numbering of the A state has been raised by one quantum over a previous report [T. Bergeman et al., Phys. Rev. A 67, 050501 (2003)] while the numbering of the b state is established with a considerable degree of certainty with help of data on the {sup 85}Rb{sup 133}Cs and {sup 87}Rb{sup 133}Cs isotopomers. In addition, we have performed calculations of spin-orbit functions by two distinct methods. The fitted spin-orbit coupling matrix element between the two {Omega}{sup p}=0{sup +} states, A {sup 1{Sigma}+} and b {sup 3{Pi}}{sub 0+}, happens to agree rather well with the results from both of these methods, while for the diagonal b {sup 3{Pi}} state spin-orbit function, the fitted function agrees fairly well with that obtained by the other method.

• OSTI ID: 21408600
• Journal Information: Physical Review. A, Vol. 81, Issue 4; Other Information: DOI: 10.1103/PhysRevA.81.042511; (c) 2010 The American Physical Society; ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
EXCITATION
EXCITED STATES
FOURIER TRANSFORMATION
FUNCTIONS
GROUND STATES
INTERACTIONS
L-S COUPLING
MATRIX ELEMENTS
MOLECULES
ORBITS
POTENTIALS
RESONANCE
SPIN
ANGULAR MOMENTUM
COUPLING
ENERGY LEVELS
ENERGY-LEVEL TRANSITIONS
INTEGRAL TRANSFORMATIONS
INTERMEDIATE COUPLING
PARTICLE PROPERTIES
TRANSFORMATIONS