Abstract
The low-lying excited states of have been studied by means of proton- angular-correlation measurements in the reaction , employing the method of Litherland and Ferguson. Protons were detected in a solid-state annular counter near 180° to the beam, and rays in a NaI(Tl) crystal at seven angles between 0° and 90°. Using an analysis procedure which is independent of any assumption regarding the reaction mechanism, spin assignments of , , and have been made to the 0.984-, 1.69-, and 1.94-MeV levels. -ray branching ratios of the 1.69- and 1.94-MeV levels have been determined. The multipole mixing ratios of the 1.69→0- and 1.94→0.984-MeV transitions have been deduced, and the latter is in agreement with that obtained from the Nilsson model following the conjecture that 0-, 0.984-, and 1.94-MeV states form the ground-state rotational band.
- Received 20 November 1968
DOI:https://doi.org/10.1103/PhysRev.185.1458
©1969 American Physical Society