Decay properties of N=82 to 84 cadmium r-process nuclides

摘要

A chemically selective laser ion source has been applied in a decay study of very neutron-rich Cd isotopes at CERN/ISOLDE. For the classsical N=82 r-process "waiting-point" isotope Cd-130, a more precise half-life of T-1/2 (162 +/-7) ms and a beta -delayed neutron (beta dn) branch of P-n=(3.5 +/-1.0) % were determined. Quite surprising results were obtained for the new isotopes Cd-131 and Cd-132, which indicate the occurrence of new nuclear-structure effects beyond N=82. [References: 11]