Gamma-ray cascades from nanosecond isomers in neutron-rich nuclei 67Cu and 64Co have been observed through heavy-ion deep-inelastic collisions of 198Pt+ 76Ge (8 MeV/nucleon) using an isomer-scope. In 67Cu, an isomeric state at 3464 keV and its decay scheme have been established. The isomeric transition is a hindered M 1 transition between the 15/2+ and the 13/2+ states with main components of (πp3/2vg9/2vf-15/2) 15/2+ and (πp3/2vg9/2vp1/2)13/2+, respectively. A fast E3 transition between the πg9/2 and the πp3/2 single-particle states indicates strong particle-octupole vibration coupling in 67Cu. An isomeric state at 834 keV with T1/2 = 6.4(3) ns has been identified in 64Co. Proton-neutron configurations of the levels established in 64Co are discussed.
|Number of pages||7|
|Journal||Physical Review C - Nuclear Physics|
|Publication status||Published - Nov 2000|
All Science Journal Classification (ASJC) codes
- Nuclear and High Energy Physics