Nucleon transfer in highly mass-asymmetric reaction systems between¹⁹⁷au and relatively light projectiles in the energy region below 10 MeV/u

Abstract

Kinetic energy spectra and angular distributions of projectile-like products in an¹⁶O-induced reaction on¹⁹⁷Au were measured by counter method at projectile energies of 8.8 MeV/u and 6.6 MeV/u. The mechanism of nucleon transfer reaction was discussed in terms of distinct groups of the products from quasi-elastic transfer (QET) and of those from deep inelastic transfer (DIT). Observations indicated that QET takes place along a trajectory near the Coulomb trajectory. Damped components of the projectile-like products observed were concluded to be produced in a very short interaction time. Cross sections of these products were reproduced by the sum rule model better than by the diffusion model, and their total kinetic energies can be explained well by a recoil formula by Siemens et al. with an assumption of a short-time interaction.