Effect of breakup and transfer on complete and incomplete fusion in ~6Li+~(209)Bi reaction in multi-body classical molecular dynamics calculation

摘要

The effect of breakup and transfer in ~6Li+~(209)Bi reaction is studied in a multi-body classical molecular dynamics approach in which the weakly-bound projectile ~6Li is constructed as a 2-body cluster of ~4He and ~2H in a configuration corresponding to the observed breakup energy. This 3-body system with their individual nucleon configuration in their ground state is dynamically evolved with given initial conditions using Classical Rigid Body Dynamics (CRBD) approach up to distances close to the barrier when the rigid-body constraint on the target, inter-fragment distance, and ~2H itself are relaxed, allowing for possible breakup of ~2H which may result in incomplete fusion following the transfer of the n or p. Relative probabilities of the possible events such as scattering with and without breakup, DCF, SCF, ICF(x) where χ may be ~4He, ~2H, ~4He+n, ~4He+p, n, p are calculated. Comparison of the calculated event-probabilities, complete, and incomplete fusion cross sections with the calculation in which ~2H is kept rigid demonstrates the effect of the transfer reactions on complete and incomplete fusion in the 4-body reaction. Events ICF(~4He+n) corresponding to nstripping followed by breakup of the resultant ~5Li to ~4He+p are found to contribute significantly in the fusion process in agreement with a recent experimental observation of direct reaction processes in breakup of weakly-bound projectiles.