Mass-Yield Distributions in the Reaction ofKr84Ions withU238

Abstract

Yields of 156 nuclides were measured radiochemically to delineate the mass distribution in the reaction of 605-MeV ${}_{}{}^{84}{}_{}{}^{}\mathrm{Kr}$ with thick ${}_{}{}^{238}{}_{}{}^{}\mathrm{U}$ targets. The yields are consistent with decomposition of the mass distribution into five components: transfer products (700±120 mb), "quasi-Kr" products centered at $A\approx 85$ (470±70 mb) and the products from symmetric fission of their complements (420±60 mb), products from low-energy fission of $Z\approx 92$ nuclides (200±40 mb), products from complete fusion-fission (55±15 mb), and unexplained neutron-deficient yields at $A\approx 195$ (∼40 mb).