Abstract
The (αHe) and (α,t) reactions on were studied at =65 MeV. Measured cross sections for the states up to 15 MeV in the residual nuclei were analyzed with the distorted wave Born approximation theory. Many spin-parity and isospin assignments were proposed based on the strengths, angular distributions, and excitation energies. Nearly equal spectroscopic factors were obtained for bound and unbound analog pairs except for the , T=1 states in and . Almost full strengths were observed for the 0, 1, and 0 transfers. The obtained spectroscopic factors for the 0 and 1 transfers were in good agreement with shell-model calculations, while the agreement was unsatisfactory for the 0 transfer in many respects. The strengths in and were more fragmented than the shell-model prediction, while only half of the expected 0 strength was found in and . The strength to the first excited 3/, T=1/2 state in was twice that predicted. Spectroscopic factors for many 0 transitions were also deduced. The 14.1 and 14.3 MeV states in , in particular, proposed to be the stretched states in a recent (e,e’) experiment, were found to be excited by pure l=3 transfer with spectroscopic factors 0.16 and 0.05, respectively.
- Received 15 June 1992
DOI:https://doi.org/10.1103/PhysRevC.46.1242
©1992 American Physical Society