H1(d→,γ)3He reaction atEd=95MeV

The tensor analyzing power $A_{\mathrm{yy}}$, vector analyzing power $A_y$, and cross section σ(θ) of the reaction ${}_{}{}^1{}_{}{}^{}(\mathrm{d}\to$,γ${)\mathrm{}}^3$He have been measured at a deuteron energy of 95 MeV, corresponding to photo- disintegration with 37 MeV photons. The total cross section is in good agreement with ${}_{}{}^3{}_{}{}^{}(\gamma$,p${)}^2$H measurements; $A_y$ and $A_{\mathrm{yy}}$ were both small and negative. $A_{\mathrm{yy}}$ is known to be sensitive to the ${}_{}{}^3{}_{}{}^{}\mathrm{He}$ D-state amplitude, and all previous measurements of tensor analyzing powers have been made in an energy region where the initial state interaction between the proton and deuteron is strong. These data were interpreted using a plane-wave Born approximation model which has been successful in describing other measurements of $A_{\mathrm{yy}}$ at lower energies. Within the framework of this model, these measurements were found to be consistent with an asymptotic D-S state normalization ratio η=-0.029.