Analyzing powers for the carbon-12(polarized lithium-7, triton/deuteron/proton) reactions.

摘要

The first, second, and third rank tensor analyzing powers TT₁₀, TT ₂₀, TT₃₀, and T ₂₀, as well as cross section angular distributions for 12 C(7i, t/d/p) at 34 MeV were measured. The experimental results gave nonzero values for TT₁₀ and TT₃₀ which is indicative of a non-statistical compound nucleus reaction mechanism according to Hauser-Feshbach predictions. The experimental results were compared to finite-range distorted wave Born approximation calculations and spectroscopic amplitudes were determined. The experimental data and calculations are discussed along with previous results. The main goal of this work was to determine the reaction mechanism; do these reactions proceed via direct transfer or statistical compound nucleus formation, and if direct, did it occur in one step or multiple steps? The results indicate that all the reactions studied are direct to some degree. There is evidence for direct transfer of a 4,5He cluster but not a 6He cluster.