https://doi.org/10.1140/epjd/e20020052
Widely usable interpolation formulae for hyperfine splittings in the 127I2 spectrum
Institut für Quantenoptik, Universität Hannover, Welfengarten 1,
30167 Hannover, Germany
Corresponding author: a tiemann@iqo.uni-hannover.de
Received:
17
July
2001
Revised:
17
October
2001
Published online: 15 April 2002
Based on new systematic high precision measurements of hyperfine splittings
in different rovibrational bands of 127I2 in the near infrared spectral
range between 778 nm and 816 nm, and the data in the range from 660 nm to 514 nm
available from literature, the quantum number dependence of the different
hyperfine interaction parameters was reinvestigated. As detailed as possible
parameters were re-fitted from the reported hyperfine splittings in literature,
considering that the interaction parameters should vary smoothly with the
vibrational and rotational quantum numbers, and follow appropriate physical
models. This type of consistency has not been sufficiently taken into account
by other authors. To our knowledge it is now possible for the first time to
separate the hfs contributions of the two electronic states
and
for optical transitions in a very large wavelength range.
New interpolation formulae could be derived for both states,
describing the quantum number dependences of the nuclear electric quadrupole,
of the nuclear spin-rotation and also of the nuclear spin-spin interactions.
Using these new interpolation formulae the hyperfine splittings for the
components with the quantum number condition
can be calculated
with an uncertainty of ≤30 kHz for transitions in the wavelength
range between 514 nm and 820 nm.
PACS: 33.15.Pw – Fine and hyperfine structure / 33.20.Kf – Visible spectra
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2002