Deformation Parameters inSm154andSm148Obtained from Coupled-Channel Analysis of Proton Scattering

Abstract

Differential cross sections for 16-Me V protons scattering from ${\mathrm{Sm}}^{154}$ and ${\mathrm{Sm}}^{148}$ were reanalyzed using the coupled-channel computer program JUPITOR-1 written by Tamura. The results of this analysis yield a better fit to the data using a value of ${\beta }_2=0.250\mathrm{}$ for ${\mathrm{Sm}}^{154}$ than with the value of 0.351 obtained from Coulomb excitation studies. The same optical-model paramters which were used for ${\mathrm{Sm}}^{154}$ yield a good fit for ${\mathrm{Sm}}^{148}$ with vibrational deformation parameters ${\beta }_2=0.120\mathrm{}$ and ${\beta }_3=0.150\mathrm{}$.