The second-rank tensor polarization parameters $〈T_{2q}〉$ describing the deuterons produced in the ${\mathrm{Be}}^9\mathrm{}(p,d)\mathrm{}{\mathrm{Be}}^8$ reaction have been measured for average proton bombarding energies of 2.5 and 3.7 MeV. Measurements were taken at ten-degree intervals for six emission angles between 0° and 50° in the laboratory system. The tensor moments were determined by observing the polar and azimuthal angular dependence of the intensity of the protons from the ${\mathrm{He}}^3\mathrm{}(d,p)\mathrm{}{\mathrm{He}}^4$ reaction when this reaction is initiated by deuterons from the ${\mathrm{Be}}^9\mathrm{}(p,d)\mathrm{}{\mathrm{Be}}^8$ reaction. Similar results were obtained at both of the bombarding energies investigated. The $〈T_{2q}〉$ are generally negative, with absolute magnitudes of the order of 0.20 or less. Preliminary calculations of the $〈T_{2q}〉$ using the distorted-wave Born approximation with spin-orbit terms in the distorting potentials agree generally in sign with the measured values, but are consistently smaller than these by at least an order of magnitude.

• Received 1 June 1965

DOI:https://doi.org/10.1103/PhysRev.140.B69