Abstract
The states of at 1.28-, 2.03-, 2.43-, 3.07-, 3.62-, and 4.08-MeV have been studied using the particle- angular-correlation method of Litherland and Ferguson. The reaction was used to populate the levels of at several bombarding energies in the neighborhood of 3 MeV. Charged particles were detected near 180° with respect to the incident-beam direction in a solid-state annular counter, and radiation was detected in a 10.2×10.2 cm NaI(Tl) crystal at angles between 0° and 90° relative to the incident-beam direction. The coincident data were stored in a 2-parameter pulse-height analyzer. -ray branching ratios derived from these data are presented for the levels mentioned above. In addition to an independent confirmation of the spin assignments , , and for the levels at 1.28-, 2.03-, and 2.43-MeV, respectively, an assignment for the 3.62-MeV level and a most probable assignment for the 3.07-MeV level are established. For the 4.08-MeV level, . Some -ray mixing ratios are also presented, and an upper limit for the mean lifetime, sec, was obtained for all the levels studied.
- Received 5 January 1967
DOI:https://doi.org/10.1103/PhysRev.157.967
©1967 American Physical Society