Elastic and Inelastic Scattering of 55 MeV Protons from 60Ni

Abstract

Elastic and inelastic scattering of protons from ⁶⁰ Ni were studied by the use of a 55 MeV proton beam from the INS synchro-cyclotron. Momentum spectra of the scattered particles were obtained with a broad range magnetic spectrometer operated with energy resolution of about 1 per cent. The angular distributions for elastic and inelastic scattering were measured between 2.3° and 88°. Optical-model parameters were adjusted to reproduce the angular distribution for the elastic scattering. The analysis based on the distorted wave Born approximation (DWBA) was made for the inelastic angular distributions assuming direct excitation. The interaction potential for the first order collective excitation was employed with real coupling. Good agreements with experiments were obtained. The effective deformation parameters β _l were evaluated by the analysis. The reduced transition ratio to the single particle value is discussed.