Abstract
Partial phase shifts have been deduced from the data on the scattering of particles (12.3 to 22.9 Mev) from He, reported in an earlier publication. The interpretation of the phase shifts is as follows: The monotonic decrease of the -wave phase shift throughout the energy range investigated indicates no broad states in for excitations between 0.5 and 11.45 Mev. The -wave phase-shift energy dependence clearly indicates the 2.9-Mev state in . The -wave phase shift shows a broad state in the neighborhood of 11 Mev with a reduced width of about 2 Mev. The -wave phase shift is first observed at 20 Mev and is positive.
Moderate success has been achieved in explaining the scattering results in terms of Haefner's alphaparticle model of .
- Received 6 August 1957
DOI:https://doi.org/10.1103/PhysRev.109.850
©1958 American Physical Society