https://doi.org/10.1140/epjd/e2008-00138-7
Ground state potentials of the NaK molecule
Institut für Quantenoptik, Welfengarten 1, 30167 Hannover, Germany
Corresponding author: a gerdes@iqo.uni-hannover.de
Received:
9
May
2008
Revised:
25
June
2008
Published online:
16
July
2008
We present a simultaneous analysis of the X
and the a
electronic ground states of the NaK molecule. Excitation of the [B
, c]-system made it possible to record fluorescence to rovibrational levels of both ground states simultaneously with a Fourier-transform spectrometer. For the first time high lying levels in the triplet state with v = 17 and v = 18 were seen, the highest possible v = 19 for 23Na–39K was not observed. The joint evaluation of the retrieved data leads to accurate potential energy curves, that describe the experimental data within their experimental uncertainty of 0.005 cm-1. Cold collision properties like scattering length and Feshbach resonance positions are calculated with these potentials and compared to other predictions.
PACS: 31.50.Bc – Potential energy surfaces for ground electronic states / 33.20.Kf – Visible spectra / 33.20.Vq – Vibration-rotation analysis / 33.50.Dq – Fluorescence and phosphorescence spectra
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2008
