X {sup 1}SIGMA{sup +} and a {sup 3}SIGMA{sup +} states of the atom pair K+Cs studied by Fourier-transform spectroscopy

Journal Article · Tue Dec 15 04:00:00 EST 2009 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.80.062501· OSTI ID:21352331

Ferber, R; Klincare, I; Nikolayeva, O; Tamanis, M; Knoeckel, H; Tiemann, E; Pashov, A ^[1]

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1. Laser Center, University of Latvia, Rainis Boulevard 19, LV-1586 Riga (Latvia)

A comprehensive study of the X {sup 1}SIGMA{sup +} and a {sup 3}SIGMA{sup +} electronic states of the K and Cs atom pair is presented. Abundant spectroscopic data include 1937 transitions to the a {sup 3}SIGMA{sup +} state and 13 724 transitions to the X {sup 1}SIGMA{sup +} state for {sup 39}K {sup 133}Cs which were obtained by Fourier-transform spectroscopy. From these data potential energy curves were constructed simultaneously for both states X {sup 1}SIGMA{sup +} and a {sup 3}SIGMA{sup +} which are coupled by the hyperfine interaction. This allows us to accurately model the potential close to K(4s)+Cs(6s) atom-pair asymptote which is required to simulate cold collision processes. Dissociation energies of the X {sup 1}SIGMA{sup +} state as D{sub e}{sup X}=4069.208(40) cm{sup -1} and of the a {sup 3}SIGMA{sup +} state as D{sub e}{sup a}=267.141(20) cm{sup -1} were determined. Scattering lengths are predicted for different KCs isotopologs and Feshbach resonances were calculated for magnetic fields up to 1000 G.

• OSTI ID: 21352331
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 6 Vol. 80; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
ALKALI METALS
ATOMS
CESIUM
CESIUM 133
CESIUM ISOTOPES
COLLISIONS
DIAGRAMS
DIMENSIONS
DISSOCIATION ENERGY
ELEMENTS
ENERGY
FOURIER TRANSFORMATION
INFORMATION
INTEGRAL TRANSFORMATIONS
INTERACTIONS
INTERMEDIATE MASS NUCLEI
ISOTOPES
LENGTH
LIGHT NUCLEI
MAGNETIC FIELDS
METALS
NUCLEI
ODD-EVEN NUCLEI
POTASSIUM 39
POTASSIUM ISOTOPES
POTENTIAL ENERGY
POTENTIALS
RESONANCE
SCATTERING LENGTHS
SPECTRA
SPECTROSCOPY
STABLE ISOTOPES
TRANSFORMATIONS