Polarization Transfer in theHe3(d,p)He4Reaction

Measurements have been made of seven polarization transfer coefficients for the ${}_{}{}^3{}_{}{}^{}\mathrm{He}\mathrm{}(d,p)\mathrm{}{}_{}{}^4{}_{}{}^{}\mathrm{He}$ reaction. The experiment used a polarized-deuteron beam from the Los Alamos Scientific Laboratory Lamb-shift polarized-ion source, a liquid-nitrogen cooled ${}_{}{}^3{}_{}{}^{}\mathrm{He}$ gas target, a magnetic quadrupole triplet for focusing the reaction protons, and a helium-filled polarimeter for simultaneously measuring the proton polarization along both transverse axes. Measurements were made of the polarization transfer coefficients $K_y^{y\prime }$ and $K_{yz}^{x\prime }$ at $\theta =0^{\circ }$ for 4- to 14-MeV deuterons. A comparison of the $K_y^{y\prime }$ results with the values reported for the ${}_{}{}^3{}_{}{}^{}\mathrm{H}\mathrm{}(d,n)\mathrm{}{}_{}{}^4{}_{}{}^{}\mathrm{He}$ reaction over the same energy range shows good agreement, as would be expected for the two charge-symmetric reactions. In addition, we have measured the proton polarization $p^{y\prime }$; the vector transfer coefficients $K_y^{y\prime }$, $K_x^{x\prime }$, and $K_z^{x\prime }$; and the tensor transfer coefficients $K_{xx}^{y\prime }$, $K_{yy}^{y\prime }$, $K_{zz}^{y\prime }$, and $K_{xz}^{y\prime }$ at 8.0 MeV for laboratory angles of 15, 30, 45, and 60°. Calculated values for these observables from an $R$ -matrix parametrization of the five-nucleon system are in good agreement with the data.