Abstract
The lifetimes of the 5.83- and 6.44-MeV levels were studied by the Doppler shift attenuation method using the reaction to populate the levels. The shifts in energy of the 0.73-MeV 5.83→5.10 transition and the 1.33-MeV 6.44→5.10 transition were observed between two angles to the beam by recording gamma-ray spectra in coincidence with the 5.10→0 transition. From these measurements the mean lifetime of the 5.83-MeV level was found to be greater than 2.3× sec, while the mean lifetime of the 6.44-MeV level was found to be (5.9±1.2)× sec.
- Received 4 December 1963
DOI:https://doi.org/10.1103/PhysRev.134.B349
©1964 American Physical Society