An angular distribution of the analyzing power for ${}_{}{}^4{}_{}{}^{}\mathrm{He}(p, p){}_{}{}^4{}_{}{}^{}\mathrm{He}$ elastic scattering was measured at 17.00 MeV to an absolute precision of ±0.01. The normalization uncertainty was verified by measurements at 11.93 MeV, 112° (lab), where $A_y$ is known to reach 1.0. The data are presented in tabular and graphical form along with predictions from published phase shifts.

NUCLEAR REACTIONS ${}_{}{}^4{}_{}{}^{}\mathrm{He}(p, p){}_{}{}^4{}_{}{}^{}\mathrm{He}$, $E_p=11.93\mathrm{} \mathrm{and} 17.00$ MeV; measured analyzing power $A_y\left(\theta \right)$ at ${\theta }_{\mathrm{c}.\mathrm{m}.\mathrm{}}=119\mathrm{}°-134\mathrm{}°$ and ${\theta }_{\mathrm{c}.\mathrm{m}.\mathrm{}}=37-157\mathrm{}°$ respectively.

• Received 28 June 1976

DOI:https://doi.org/10.1103/PhysRevC.15.514