The (p. t) Reaction on Even-Even Deformed Nuclei

Abstract

The (p, t) reactions on 158 Gd, 164 Dy, 172 Yb, 176 Hf and 184 W have been studied with 51.7 MeV protons. Triton spectra have been measured with a broad-range magnetic spectrometer with a 200 proportional-counter array. The cross sections for the states of the ground state rotational band which have been found to depend on mass number, have been analyzed by the distorted-wave Born-approximation. Especially Y 4 -diformation parameter β 4 for each nucleus has been obtained from the cross section for the 4 + state of the ground state rotational band. The cross sections for the first excited 0 + states have been found to have a mass number dependence and this dependence was compared with the prediction based on the pairing vibrational mode.