Abstract
The systematics of the and isomeric configurations was studied for the odd-Z isotones near the proton drip line. The isomeric decays in , , , and were measured by means of x-ray, γ-ray, and charged particle spectroscopy at the Recoil Mass Spectrometer at the Holifield Radioactive Ion Beam Facility (ORNL). The spin and parity of and were deduced for the isomers in and . New decay schemes were established, and the half-lives of the isomers were measured to be 302(4) ns for and 25(1) μs for . No evidence for the expected ground-state was found in the decay data. The proton-emission from was restudied. Five proton transitions were assigned to two proton-emitting states. The half-lives of 198(3) ms and 68(3) ms and the spin and parity values of and were established for and , respectively. For the first time for an odd-odd nucleus, the interpretation of the observed decay properties and structure of the proton-emitting states was made by accounting for deformation and proton and neutron coupling to the core excitations. A complex wave-function structure was obtained, with dominating components of for the isomer and for the ground state.
19 More- Received 16 September 2005
DOI:https://doi.org/10.1103/PhysRevC.73.024316
©2006 American Physical Society