Abstract
The zero-degree differential cross section for pion double-charge exchange on was measured at three incident pion energies and found to be 2.00±0.34, 2.19±0.44, and 1.67±0.38 μb/sr at 139, 126, and 95 MeV, respectively. A similar measurement for at an energy of 145 MeV resulted in a value of 0.87 ± 0.21 μb/sr. The ratio of the ground-state transitions near 140 MeV is . The mass excess determined for is 24.4 ± 0.5 MeV. The experimental setup and data analysis are discussed in detail. Results are compared with various calculations and discussed from the standpoint of their implications for learning about reaction dynamics and nuclear structure. The reaction appears to be quite sensitive to ground-state correlations of the target.
NUCLEAR REACTIONS , MeV; measured . , MeV; measured , deduced .
- Received 31 October 1977
DOI:https://doi.org/10.1103/PhysRevC.17.1774
©1978 American Physical Society