Multinucleon transfer reactions in closed-shell nuclei

TL;DR

This study investigates multinucleon transfer reactions near the Coulomb barrier in specific calcium, zirconium, and lead nuclei using advanced gamma-particle coincidence techniques, providing detailed product identification and reaction dynamics insights.

Contribution

It presents high-resolution experimental data on multinucleon transfer reactions with complete product identification and compares results with semiclassical models, highlighting new insights into particle-phonon couplings.

Findings

Identification of transfer products via trajectory reconstruction

Observation of gamma transitions in 95Zr related to particle-phonon couplings

Detection of gamma decays in 42Ca linked to pairing vibrations

Abstract

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