Abstract

The inelastic scattering of protons by $^{40}\mathrm{Ca}$ leading to a resonance at ${E}_{x}$\ensuremath{\sim}14 MeV was studied at an incident energy of 65.1 MeV with an energy resolution of 23 keV. The resonance was found to consist of many discrete states, most of which were ${2}^{+}$ states, and exhausted 8% of the energy-weighted sum rule. Octupole strength of 1.8% of the energy-weighted sum rule was found, 4 times smaller than that observed in electron scattering.

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