Study of low-lying levels in 47Ca with the 48Ca( [formula omitted], t) 47Ca reaction

Abstract

Angular distributions of cross sections [α(θ)] and vector analyzing powers [ iT 11( γ)] have been measured for seven low-lying states or groups of states excited by the 48Ca( d , t) 47Ca reaction with 13.5 MeV deuterons and analyzed by the DWBA. On the basis of comparison of vector analyzing powers with DWBA calculations, spin-parity assignments have been made or confirmed for several states. Spectroscopic factors have been extracted. Angular distributions for weak states at 3.30 and 3.57 MeV excitation in 47Ca could not be reproduced by DWBA calculations. Investigations of compound nucleus and multi-step contributions to the cross sections and analyzing powers for these states have been made by means of Hauser-Feshbach and CCBA calculations. Optical model parameters were obtained from analysis of 13.5 MeV deuteron elastic scattering cross sections and analyzing powers.