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The behavior of the complex phase shifts over the 5.3- and 9.14-Mev. Anomalies in C__(p,p)C__
Duval, Joseph Stephen
Barnard, A. C. L.
Master of Arts
The elastic scattering of protons from carbon in the range of incident energies from 5.0 to 6.0 MeV. and 9.0 to 9-3 MeV. has been investigated using the Rice University tandem Van de Graaff accelerator and a differentially pumped gas scattering chamber (a). Absolute differential cross sections for the elastic scattering of protons from carbon were measured at laboratory angles of 85.22°, 121.16°, and 159.45° as a function of energy. Also measured were absolute differential cross sections as a function of angle at incident proton energies Ep = 5.18, 5.23, 5.28, 5.33, 5-35, 5-36, 5-37, 5.38, 5.43, 5.48, 5.87, 9.09, 9.10, 9.13, 9.19, 9.22, and 9.26 MeV. Complex phase shifts are obtained to represent the data. It is shown that in the case of the d 3/2 resonance at 5.3 MeV. and the f 5/2, resonance 9.14 MeV. the "resonating" complex phase shift does not pass through 90°.