CROSS-SECTIONS AND ISOMERIC RATIOS IN AU-197(ALPHA, 2PN)(198(M,G))AU REACTIONS

Excitation functions for the production of Au-198m, Au-198g, (198(m+g) )Au, by (alpha, 2pn) reactions on gold and isomeric ratios for Au-198 were determined experimentally. The method of activation of metallic f oils was employed. The irradiations were performed in the isochronous cyclotron at Karlsruhe (Germany) with alpha-particles at 90 MeV. Gamma -spectrometry by means of an intrinsic Ge detector was used to determi ne the nuclides produced. In addition, a comparison between the cross sections obtained and a calculation using the hybrid model of pre-equi librium reactions, in combination with the statistical model developme nt by ERNST is presented.