Abstract
The resonance states of have been calculated within a particle-hole basis using the unified-shell-model approach to reaction theory with a finite Saxon-Woods potential and a zero-range effective interaction. Coulomb wave functions are used for both scattering and bound proton orbitals, so the analog spin quantum number is needed. The resonance states for are presented together with their analog spin impurity and their neutron and proton widths. Coupling to the single-nucleon continuum states produces a downward energy shift and several instances of analog spin mixing. Two states at 16.23 and 17.26 MeV exhibit a complete breakdown of analog spin and isospin. The and cross sections are calculated using the matrix of MacDonald and Mekjian. The effects of isospin impurity in resonance states are drastically suppressed in an illustration of the "dynamic criterion" for isospin mixing in resonant amplitudes.
- Received 24 January 1969
DOI:https://doi.org/10.1103/PhysRev.182.1066
©1969 American Physical Society