The tensor analyzing power of $A_{\mathrm{zz}}\left(0\mathrm{}°\right)$ has been measured for the charge symmetric ${}_{}{}^3{}_{}{}^{}\mathrm{He}\mathrm{}(d,p)\mathrm{}{}_{}{}^4{}_{}{}^{}\mathrm{He}$ and ${}_{}{}^3{}_{}{}^{}\mathrm{H}\mathrm{}(d,n)\mathrm{}{}_{}{}^4{}_{}{}^{}\mathrm{He}$ reactions as a function of incident deuteron energy from 0.24 to 6.75 MeV. The measurements were performed in a nearly simultaneous fashion to ensure that a meaningful comparison of $A_{\mathrm{zz}}\left(0\mathrm{}°\right)$ for the two reactions could be made. The absolute scale of the ${}_{}{}^3{}_{}{}^{}\mathrm{He}\mathrm{}(d,p)\mathrm{}{}_{}{}^4{}_{}{}^{}\mathrm{He}$ analyzing power was calibrated at four energies using the isospin forbidden ${}_{}{}^{16}{}_{}{}^{}\mathrm{O}(d,{\alpha }_1){}_{}{}^{14}{}_{}{}^{}\mathrm{N}$ reaction. Large differences in $A_{\mathrm{zz}}\left(0\mathrm{}°\right)$ for the two reactions were observed for energies both below 1.65 MeV and above 4 MeV. The ${}_{}{}^3{}_{}{}^{}\mathrm{H}\mathrm{}(d,n)\mathrm{}{}_{}{}^4{}_{}{}^{}\mathrm{He}$ data reported here resolve discrepancies in published data of other authors; the ${}_{}{}^3{}_{}{}^{}\mathrm{He}\mathrm{}(d,p)\mathrm{}{}_{}{}^4{}_{}{}^{}\mathrm{He}$ results confirm previously reported measurements, except for a small scale shift.

NUCLEAR REACTIONS ${}_{}{}^3{}_{}{}^{}\mathrm{He}(\overrightarrow{d},p){}_{}{}^4{}_{}{}^{}\mathrm{He}$, ${}_{}{}^3{}_{}{}^{}\mathrm{H}(\overrightarrow{d},n){}_{}{}^4{}_{}{}^{}\mathrm{He}$, $E=0.24\mathrm{}-6.75$ MeV; measured $A_{\mathrm{zz}}\left(0\mathrm{}°\right)$; calibrated beam polarization by ${}_{}{}^{16}{}_{}{}^{}\mathrm{O}(\overrightarrow{d},{\alpha }_1){}_{}{}^{14}{}_{}{}^{}\mathrm{N}$ reaction.

• Received 6 July 1979

DOI:https://doi.org/10.1103/PhysRevC.21.475