Precise measurements of the deuteron vector analyzing power Ayd and the tensor analyzing power Ayy of the 1H (d⃗,γ)3He capture reaction have been performed at deuteron energies of 29 MeV and 45 MeV. The data have been compared to theoretical state-of-the-art calculations available today. Due to the large sensitivity of polarization observables and the precision of the data light could be shed on small effects present in the dynamics of the reaction.