Comparison ofHe3-,He4-, andC12-induced nuclear reactions in heavy-mass targets at medium excitation energies. I. Experimental cross sections

The excitation functions for the ${}_{}{}^{197}{}_{}{}^{}\mathrm{Au}{({}_{}{}^{12}{}_{}{}^{}\mathrm{C},xn)}^{209-x}$ At, ${}_{}{}^{209}{}_{}{}^{}\mathrm{Bi}{({}_{}{}^3{}_{}{}^{}\mathrm{He},xn)}^{212-x}$ At, ${}_{}{}^{209}{}_{}{}^{}\mathrm{Bi}{(\alpha ,xn)}^{213-x}$ At, ${}_{}{}^{187}{}_{}{}^{}\mathrm{Re}{({}_{}{}^3{}_{}{}^{}\mathrm{He},xn)}^{190-x}\mathrm{Ir}$, ${}_{}{}^{187}{}_{}{}^{}\mathrm{Re}{(\alpha ,xn)}^{191-x}\mathrm{Ir}$, and ${}_{}{}^{197}{}_{}{}^{}\mathrm{Au}{({}_{}{}^3{}_{}{}^{}\mathrm{He},xn)}^{200-x}\mathrm{Tl}$ reactions were obtained by the activation method employing the stacked-foil technique. The maximum laboratory kinetic energies were 70-MeV ${}_{}{}^3{}_{}{}^{}\mathrm{He}$, 80-MeV ${}_{}{}^4{}_{}{}^{}\mathrm{He}$, and 120-MeV ${}_{}{}^{12}{}_{}{}^{}\mathrm{C}$ ions. The radiations accompanying the decay of the induced radioisotopes were detected by a calibrated Ge(Li) detector and the cross sections were deduced by the activation method.