Abstract
The energy levels in were studied by means of () reaction spectroscopy using 10-MeV deuterons. The protons that emerged were analyzed by a single-gap, broad-range magnetic spectrograph with 13-keV resolution. We obtained the reaction value of 2938±3 keV. Exposures were taken at eight angles ranging from 25° to 105°. All spectra were fitted, using a least-squares code, up to an excitation energy of 1860 keV. Seventy states were observed and the angular distributions of the most prominent groups were analyzed by means of distorted-wave Born-approximation stripping theory. Spins of the levels determined from previous decay-scheme studies and the present research, and the proton intensities observed in the reaction, can be satisfactorily explained in terms of the mixed configurations, and . Above 600 keV, however, interpretation of states in terms of higher energy configurations appears also to require phonon-particle coupling.
- Received 13 June 1966
DOI:https://doi.org/10.1103/PhysRev.153.1331
©1967 American Physical Society