https://doi.org/10.1140/epjd/e2004-00156-5
Spectroscopic studies of NaCs for the ground state asymptote of Na + Cs pairs*
1
Department of Physics and Institute of Atomic Physics and Spectroscopy,
University of Latvia, Rainis Boulevard 19, LV 1586 Riga, Latvia
2
Institute for Scientific Research in Telecommunications,
ul. Hajdushka poliana 8, 1612 Sofia, Bulgaria
3
Institut für Quantenoptik, Universität Hannover,
Welfengarten 1, 30167 Hannover, Germany
Corresponding author: a tiemann@iqo.uni-hannover.de
Received:
29
June
2004
Revised:
10
September
2004
Published online:
23
November
2004
The ground state X
of NaCs was studied by laser induced fluorescence Fourier-transform spectroscopy.
An accurate potential energy curve was derived from
more than 5000 transitions. This potential reproduces the experimental
observations within their uncertainties of -1 and
covers about 99.97% of the potential well depth. Few vibrational
levels of the shallow state a
below the atomic ground state asymptote
were observed. The identification is mainly done by the observed
and quantitatively interpreted molecular hyperfine structure applying atomic parameters of the ground states of Na and Cs. An estimated potential curve for a is reported which can be used together with
that of X for coupled channel calculations of cold collisions between Na and Cs. An example is given.
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, 2004
