Abstract
The ground-state nuclear pair decay branch from the 7.65-MeV level in has been measured using the reaction on a 3.5-mg/ thick carbon target at MeV together with a magnetic pair spectrometer. For normalization the internal pair line due to the 4.44-MeV transition from the first-excited state of was used. In separate measurements the corresponding relative populations of the 7.65- and 4.44-MeV states were determined. The angular distribution of the 4.44-MeV rays was also measured in order to obtain the correction to the spectrometer efficiency due to nuclear alignment. A pair decay branch of (7.1 ± 0.8) × was obtained for the 7.65-MeV level in agreement with, but somewhat more accurate than previous measurements.
NUCLEAR STRUCTURE , 7.65-MeV state; measured ; deduced .
- Received 9 August 1977
DOI:https://doi.org/10.1103/PhysRevC.16.2394
©1977 American Physical Society