Abstract
Particle decay of Br and As was observed through -delayed proton emission of Kr and Se, respectively. Decay spectroscopy was performed through - correlations using a position-sensitive silicon-implantation detector surrounded by a -ray detector array. A -decay half-life of 27(3) ms was measured for Kr and 33(4) ms for Se. The Kr ground state decays by a superallowed transition to its unbound isobaric analog state in Br which immediately decays by a 2.97(5)-MeV proton group to the first excited state in Se at 854.2 keV. This chain of decays constrains both the mass and spin of the Kr ground state. We observed no evidence of ground-state proton decay from Br.
2 More- Received 25 August 2011
DOI:https://doi.org/10.1103/PhysRevC.84.051306
©2011 American Physical Society