Abstract
Doubly charged ions have been scattered from helium gas to permit the investigation of excited states in at excitation energies between 3.9 and 8.4 MeV. In addition to the known level at 4.54 MeV, the member of this spin-orbit doublet has also been observed. This new state is located at an excitation energy of 6.51±0.04 MeV and has a reduced width of 3.96× MeV cm. No positive-parity states are observed in this range of excitation energies. A phase-shift analysis of the data has been made for bombarding energies above 5.75 MeV, and the spin polarization of the scattered particles has been calculated. Several regions in the , plane were found that should yield polarizations near unity.
- Received 19 December 1962
DOI:https://doi.org/10.1103/PhysRev.130.1112
©1963 American Physical Society