Shapes of Measured (ppol,p′) Analyzing Powers at 160 MeV for Proton States inZr90and Neutron States inZr92

Abstract

Analyzing-power data for excitation of states in ${}_{}{}^{90,92}{}_{}{}^{}\mathrm{Zr}$ by 160-MeV protons show striking differences, especially for the first $4^{+}$ states. Coupled with considerations of the structure of these states and the $N-N$ $t$ matrix these data strongly suggest that such measurements should provide a sensitive probe of the participating shell-model configurations and their isospin constituency. Data for the $8_1^{+}$ state in ${}_{}{}^{90}{}_{}{}^{}\mathrm{Zr}$ establish the dominant role of the $N-N$ $\overrightarrow{\mathrm{L}}·\overrightarrow{\mathrm{S}}$ force in the excitation of high-spin natural-parity states.