Abstract
The lowest state of has been observed in the isospin-forbidden reaction, where anomalies have been found in the elastic channel and in the inelastic channels to the 6.13- and 7.12-MeV states of . The partial width of this state as obtained from a phase-shift analysis of the elastic data is eV. The excitation energies of both the lowest and the next higher states have been determined by using the threshold and a resonance as calibration points. Values of MeV ( MeV) and 12.554±0.008 MeV ( MeV) have been obtained, in agreement with the positions determined from the reaction. The second state is well suited as an energy calibration point for accelerators.
- Received 14 July 1967
DOI:https://doi.org/10.1103/PhysRev.163.1051
©1967 American Physical Society