Abstract
The mean life of the first excited state of has been measured using a pulsed-beam technique. The mean life is definitely <0.5 mμsec. The result obtained is (0.35±0.15) mμsec with the upper limit more firmly established than the lower. A value of 495±15 kev was obtained for the excitation energy in . A measurement of the mean life of the first excited state of gave a value of (0.90±0.1) mμsec.
- Received 2 July 1958
DOI:https://doi.org/10.1103/PhysRev.112.903
©1958 American Physical Society