2002/06/07 by Viatcheslav Kokoouline, Cyril Drag, P. Pillet +1 · 1 citation
Physics and Astronomy · #Cold Atom Physics and Bose-Einstein Condensates #Quantum, superfluid, helium dynamics #Advanced Chemical Physics Studies
paper · doi:10.1103/physreva.65.062710
openalex publication_date 2002/06/07 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Recently, the method of Lu-Fano plots was extended to potentials with general R^\ensuremath-n asymptotic behavior. The aim of this paper is to discuss the efficiency of this method for the interpretation of experimental vibrational spectra of long-range diatomic molecules when two channels are coupled. A Lu-Fano analysis is implemented on experimental data for the Cs20u+(6S+6P1/2,3/2) photoassociation spectra below the 6S+P1/2 and 6S+P3/2 dissociation limits. The parameters are fitted on level energies and predissociation widths, giving information about the asymptotic coefficients C3 for both channels and about a coupling parameter which determines the variation of predissociation widths as a function of detuning. This parameter can be extrapolated above the 6S+P3/2 threshold to yield the fine-structure transition cross section between the two channels. The probability for such a transition in a model where hyperfine structure effects are neglected is found to be 0.54.