Multinucleon transfer reactions in closed-shell nuclei

Abstract

Multinucleon transfer reactions in ${}^{40}\mathrm{Ca}+{}^{96}\mathrm{Zr}$ and ${}^{90}\mathrm{Zr}+{}^{208}\mathrm{Pb}$ have been measured at energies close to the Coulomb barrier in a high-resolution γ-particle coincidence experiment. The large-solid-angle magnetic spectrometer PRISMA coupled to the CLARA γ array has been employed. Trajectory reconstruction has been applied for the complete identification of transfer products. Mass and charge yields, total kinetic energy losses, γ transitions of the binary reaction partners, and comparison of data with semiclassical calculations are reported. Specific transitions in ${}^{95}\mathrm{Zr}$ populated in one-particle transfer channels are discussed in terms of particle-phonon couplings. The γ decays from states in ${}^{42}\mathrm{Ca}$ in the excitation energy region expected from pairing vibrations are also observed.