ASTRID @ 58 keV — A measurement of Spin‐TRansfer coefficients In the fusion reaction D(d⃗, p⃗)3H

We measured the polarization‐transfer coefficient Kyy′ of the fusion reaction 2H(d, p)3H at the fusion relevant energy of Ed = 58 keV at the laboratory reaction angle θ = 45°. The result is compared with theoretical predictions based on Faddeev‐Yakubovsky equations, calculated with and without inclusion of the Coulomb interaction, and a prediction based on a T‐matrix parametrization of all available data of this reaction at energies below 1500 keV.