Half-life measurements of the neutron drip line nuclei , and

Abstract

The -decay study of the neutron drip line nuclei , and is presented. These nuclei were produced by the fragmentation of 95 MeV/ projectiles on a target. The nuclei were separated by the doubly achromatic projectile-fragment separator RIPS, and were implanted into a stopper to observe their decays. The half-lives and -delayed neutron emission probabilities of , and were preliminarily determined for the first time.