Coupling of the X {sup 1}{sigma}{sup +} and a {sup 3}{sigma}{sup +} states of KRb

Journal Article · Wed Aug 15 04:00:00 EDT 2007 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.76.022511· OSTI ID:21011422

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

---

1. Department of Physics, Sofia University, 5 James Bourchier Boulevard, 1164 Sofia (Bulgaria)

A comprehensive study of the electronic states at the 4s+5s asymptote in KRb is presented. Abundant spectroscopic data on the a {sup 3}{sigma}{sup +} state were collected by Fourier-transform spectroscopy, which allows one to determine an accurate experimental potential energy curve up to 14.8 A. The existing data set [C. Amiot et al., J. Chem. Phys. 112, 7068 (2000)] on the ground state X {sup 1}{sigma}{sup +} was extended by several additional levels lying close to the atomic asymptote. In a coupled channels fitting routine complete molecular potentials for both electronic states were fitted. Along with the line frequencies of the molecular transitions, recently published positions of Feshbach resonances in {sup 40}K and {sup 87}Rb mixtures [F. Ferlaino et al., Phys. Rev. A 74, 039903 (2006)] were included in the fit. This makes the derived potential curves capable for an accurate description of observed cold collision features so far. Predictions of scattering lengths and Feshbach resonances in other isotopic combinations are reported.

• OSTI ID: 21011422
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 2 Vol. 76; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
COUPLED CHANNEL THEORY
COUPLING
DIATOMS
ELECTRONIC STRUCTURE
FOURIER TRANSFORM SPECTROMETERS
GROUND STATES
MIXTURES
PHOTON-MOLECULE COLLISIONS
POTASSIUM 40
POTASSIUM COMPOUNDS
POTENTIAL ENERGY
POTENTIALS
RESONANCE
RUBIDIUM 87
RUBIDIUM COMPOUNDS
SCATTERING LENGTHS
SPECTRA
SPECTROSCOPY
SURFACES