Nuclear Resonance Spectroscopy in SCANDIUM-45 and CALCIUM-40.

Magnitudes and relative signs of inelastic proton decay amplitudes have been determined for 23 3/2('-) resonances and 53 5/2('+) resonances in ('45)Sc by measuring angular distributions of inelastically scattered protons and of deexcitation gamma-rays in the ('44)Ca(p,p'(gamma)) reaction. The experiment was performed with an overall energy resolution of 350-400 eV at the KN Van de Graaff accelerator and high resolution system of Triangle Universities Nuclear Laboratory. Statistical analyses were performed on reduced widths and reduced width amplitudes for 3/2('-) and 5/2('+) resonances. Strong channel-channel correlations were observed for widths and amplitudes, including the first case for l = 1 resonances of a large amplitude correlation over a broad energy range. These correlations are interpreted as evidence for a direct reaction component in the scattering matrix. It is shown that under suitable conditions, the(' )(p,(alpha)(,0)) reaction can be employed to determine both magnitudes and relative signs of entrance channel amplitudes. A single resonance in ('40)Ca was studied with the TUNL FN tandem Van de Graaff accelerator, and the mixing parameters for the entrance channel were extracted.