Abstract
The and spectra of have been measured with a wedge-gap magnetic spectrometer and a 3- lithium-drifted germanium detector, respectively. was produced by a () reaction on a natural magnesium target in the UCLA cyclotron. The mass excess of is measured to be 6863±40 keV. The half-life of is 0.408±0.006 sec. Two branches of 11.25±0.04 and 5.55±0.15 MeV were observed, and their relative intensities measured to be 100±2 and 9±1, respectively. The more energetic branch feeds the first excited state of ; the excitation energy is determined to be 1633.2±1.0 keV from a study of its transition. The 5.55-MeV branch establishes a link with the known delayed- spectra from the highly excited states of , and allows us to propose a decay scheme for . Limits on the intensities of possible unobserved transitions are discussed.
- Received 22 May 1967
DOI:https://doi.org/10.1103/PhysRev.163.1091
©1967 American Physical Society