THE OSCILLATOR-STRENGTHS OF THE GAII LINE S IN THE VISIBLE SPECTRUM AND THE GALLIUM ABUNDANCE IN THE ATMOSPHERE OF HGMN STAR KAPPA-CANCRI

We report the results of experimental determinations of the oscillator strengths of the GaII lambdalambda4250 - 4262 lines and the estimates of loggf-values for the Gall lambdalambda5330 - 5422 and lambdalambda 6334 - 6456 lines. The latter were obtained by interpolation and extra polation of the lifetimes of relevant energy levels. The results of th eoretical calculations and experimental data are in good agreement. Th e oscillator strengths obtained by us were checked against observation al data for the Ga lines in the spectrum of HgMn star kappa Cnc. From the lines in the visible spectrum of kappa Cnc that do not have notice able hyperfine structure we derive the mean gallium abundance logGa/H = -4.27. This value is by five orders of magnitude higher than the sol ar one, and more than by an order of magnitude higher than the Ga abun dance in the atmosphere of kappa Cnc derived from the resonance GaII a nd GaIII lines in the ultraviolet spectrum.