The study of the 51V(p, n) 51Cr reaction

Abstract

The excitation functions of the 0.75, 1.17, 1.35 and 1.50 plus MeV gamma rays resulting from the 51V(p, n) 51Cr ∗ reaction have been measured from their respective thresholds up to 5.5 MeV. They all vary smoothly with proton energy and exhibit no significant structure. The ratio of the measured yield of 0.75 MeV gamma rays to that of 1.17 MeV gamma rays as a function of incident proton energy is compared with the ratio predicted by the Hauser-Feshbach theory, and the spin of the levels was deduced to be 3 2 and 5 2 respectively. The n 1−0.75 MeV gamma and n 2−1.17 MeV gamma angular correlations have been measured at proton energies 3.1, 3.3 and 3.5 MeV in the plane of the reaction and at 3.1 and 3.3 MeV in plane perpendicular to it. The shapes of the measured correlations are not in complete agreement with the predictions of the compound nucleus statistical model and seem to indicate either the pre-ponderance of a cluster of compound nucleus levels or some interference effect.