INVESTIGATION OF THE II-90 GIANT IN GLOBULAR-CLUSTER M-13

A model-atmopshere analysis of the II-90 giant in the globular cluster M 13 is made on high-dispersion spectra taken with the echelle-spectr ometer at the 6-m telescope of the Special Astrophysical Observatory. The abundances of 23 chemical elements are determined. The excess of s odium, aluminium, silicon and titanium is found relative to iron-peak elements. The overabundance of elements (La, Pr, Nd, Eu) synthesized m ainly in reaction with high-density neutron flux is detected. The oxyg en abundance is [O/Fe] = 0.07. Estimates are made of the lithium abund ance.