Mahananda Dasgupta

Fusion versus breakup: observation of large fusion suppression for 9Be + 208Pb

Complete fusion excitation functions for

Relating Breakup and Incomplete Fusion of Weakly Bound Nuclei through a Classical Trajectory Model with Stochastic Breakup

{}^{9}\mathrm{Be}{+}^{208}\mathrm{Pb}

Coupled-channels analysis of the 16 O + 208 Pb fusion barrier distribution

have been measured to high precision at near barrier energies. The experimental fusion barrier distribution extracted from these data allows reliable prediction of the expected complete fusion cross sections. However, the measured cross sections are only 68% of those predicted. The large cross sections observed for incomplete fusion products support the interpretation that this suppression of fusion is caused by

Probing fusion barrier distributions with quasi-elastic scattering

{}^{9}\mathrm{Be}

Influence of entrance-channel magicity and isospin on quasi-fission

breaking up into charged fragments before reaching the fusion barrier. Implications for the fusion of radioactive nuclei are discussed.

Adiabatic quantum tunneling in heavy-ion sub-barrier fusion

A classical dynamical model that treats breakup stochastically is presented for low energy reactions of weakly bound nuclei. The three-dimensional model allows a consistent calculation of breakup, incomplete, and complete fusion cross sections. The model is assessed by comparing the breakup observables with continuum discretized coupled-channel quantum mechanical predictions, which are found to be in reasonable agreement. Through the model, it is demonstrated that the breakup probability of the projectile as a function of its distance from the target is of primary importance for understanding complete and incomplete fusion at energies near the Coulomb barrier.

Microscopic approach to coupled-channels effects on fusion

Analyses using simplified coupled-channels models have been unable to describe the shape of the previously measured fusion barrier distribution for the doubly magic

Strong dependence of sub-barrier fusion on the nuclear hexadecapole deformation

^{16}

Suppression of complete fusion due to breakup in the reactions 10,11 B + 209 Bi

O+

Absence of fusion suppression due to breakup in the 12C + 7Li reaction

^{208}