Abundance of zinc in the red giants of Galactic globular cluster 47
  Tucanae
  We investigate possible relations between the abundances of zinc and the
light elements sodium, magnesium, and potassium in the atmospheres ofred giant
branch (RGB) stars of the Galactic globular cluster 47~Tuc and study
connections between the chemical composition and dynamical properties of the
cluster RGB stars. The abundance of zinc was determined in 27 RGB stars of
47~Tuc using 1D local thermal equilibrium (LTE) synthetic line profile fitting
to the high-resolution 2dF spectra obtained with the Anglo-Australian Telescope
(AAT). Synthetic spectra used in the fitting procedure were computed with the
SYNTHE code and 1D ATLAS9 stellar model atmospheres. The average 1D~LTE
zinc-to-iron abundance ratio and its RMS variations due to star-to-star
abundance spread determined in the sample of 27 RGB stars is
$\langle{\rm[Zn/Fe]}\rangle^{\rm 1D~LTE}=0.11\pm0.09$. We did not detect any
statistically significant relations between the abundances of zinc and those of
light elements. Neither did we find any significant correlation or
anticorrelation between the zinc abundance in individual stars and their
projected distance from the cluster center. Finally, no statistically
significant relation between the absolute radial velocities of individual stars
and the abundance of zinc in their atmospheres was detected. The determined
average [Zn/Fe]$^{\rm~1DLTE}$ ratio agrees well with those determined in this
cluster in earlier studies and nearly coincides with that of Galactic field
stars at this metallicity. All these results suggest that nucleosynthesis of
zinc and light elements proceeded in separate, unrelated pathways in 47~Tuc.
