Abstract
Accurate measurements of elastic scattering cross sections were made at energies of 11.157, 12.040, 13.600, and 14.230 MeV. The average relative error is about 0.6% and the scale error is 0.37%. These data and all available cross section and spin-dependent measurements of scattering between 0 and 18 MeV were collected and prepared for input to a general purpose -matrix analysis program. Strict statistical criteria were used for the elimination of data. The resulting search on 1131 data produced a unique fit with a per degree of freedom of 1.001 which is within one standard deviation in space. Arbitrary normalizations to the data were not allowed; a normalization was treated as another datum restrained by a scale error obtained from the experimental information. The parameter space was made up of background contributions in , , , and states with an additional level each in the and states. There were 14 free parameters. For the first time, the reduced widths of the -wave resonance states come out almost equal. Comparisons are made to the -matrix analysis of Stammbach and Walter and to the phase shift analysis of Arndt, Roper, and Shotwell.
NUCLEAR REACTIONS , MeV; measured , , , ; calculated -matrix parameters for all data, MeV.
- Received 28 June 1976
DOI:https://doi.org/10.1103/PhysRevC.15.518
©1977 American Physical Society