Analyzing powers in inclusive Ag(p,He3) and Ag(p,He4) reactions at intermediate energies

Asymmetries associated with ${}_{}{}^3{}_{}{}^{}\mathrm{He}$ and ${}_{}{}^4{}_{}{}^{}\mathrm{He}$ single particle inclusive spectra from reactions of polarized protons with Ag targets have been measured for helium isotopes produced at 60°, 90°, and 135° with $E_p=518\mathrm{}$ MeV and at 60° with $E_p=237\mathrm{} \mathrm{and} 445$ and 445 MeV over a helium energy range from 7 to 63 MeV. The analyzing powers $A_y(E, E_{\mathrm{He}},{\theta }_{\mathrm{He}})$ derived from these are near zero throughout the measured ranges. This is a constraint on direct interaction models of fragment production.