Abstract
Collective effects in transitions are found even in light nuclei. We have sought to extend the knowledge of this phenomenon by measuring the lifetime of the first excited state of at 3.37 MeV. To do this we have used two new variants of the Doppler-shift attenuation method. The was produced by the reaction and the recoiling was slowed down in beryllium or in beryllium-copper. We find a mean lifetime of (1.4±0.3)× sec. The analysis of Doppler-shift measurements of the type used here is given at length.
- Received 2 October 1962
DOI:https://doi.org/10.1103/PhysRev.129.2180
©1963 American Physical Society