Nuclear Data Sheets for A = 267–293

Abstract

These data are mainly from cold fusion experiments performed at GSI/Ship, Dubna, and Berkeley. The experiments generally involve mass separation of heavy elements followed by implantation into a position–sensitive alpha–particle detector. The position, energy, and time with respect to implantation are recorded. Successive decays at a given position are correlated into a decay chain linking the heaviest cold fusion product to lighter nuclei which also may be previously unknown. In some cases the decay chain ends in spontaneous fission, and some alpha particles escape the detector leaving only partial energy signals. When multiple alpha decay chains are observed for a given parent, the evaluators have made subjective assignments to isomer and ground states based on comparable alpha particle energies and decay times.