https://doi.org/10.1140/epjd/e2003-00208-4
Experimental study of the Ca2 1S+1S asymptote
Institut für Quantenoptik, Universität Hannover,
Welfengarten 1, 30167 Hannover, Germany
Corresponding author: a allard@iqo.uni-hannover.de
Received:
17
January
2003
Revised:
2
April
2003
Published online:
15
July
2003
The van der Waals coefficients C6, C8 and C10 at the
1S+1S calcium dimer asymptote are determined from
spectroscopic observations.
The filtered laser excitation technique was applied for measuring
transition frequencies of the Ca2 B-X system from asymptotic
levels of the X
ground state reaching
v''=38. That level which is only 0.2 cm-1 below the molecular
1S+1S asymptote has an outer classical turning point
of about 20 Å. The extraction of confidence limits for the
long range coefficients including the dissociation energy from the
experimental data involving Monte Carlo simulation is described.
A range for the s-wave scattering length is derived.
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, 2003
