Reaction mechanism studies on Si 28(d, p)Si 29 (I) distorted wave effects

Abstract

A study of the (p, γ) angular correlations involving the 1.28 and 2.03 MeV states in Si 29 populated by the Si 28(d, p)Si 29 reaction has been carried out for deuteron energies in the range from 6 to 9 MeV. In each case measurements were carried out in the (d,p) reaction plane with protons detected on the observed peak of the l n= 2 stripping angular correlation. These data have been analysed within the framework of distorted-wave stripping formalism. The measurements on the 2.03-MeV state alone enable the statistical tensors for the reaction to be determined for each incident deuteron energy. These statistical tensors were then used to compute the angular correlation of the 1.28-MeV radiation, yielding results in good agreement with the experimental measurements and thus supporting the expectation that the matrix elements are essentially independent of the detailed nuclear structure of the final state. The statistical tensors have also been used to predict the general (p, γ) angular correlation function over the sphere as well as the magnitude of the proton polarization for the Si 29∗- proton systems involving both the 1.28 MeV and 2.03 MeV excited states.