Fusion and Heavy Ion Reactions

Sensitivity to multi-phonon excitations in heavy-ion fusion reactions

Measured cross sections for the fusion of Ni with Ni, Ge, and Mo targets are analyzed in a coupled-channels approach. The data for the Ni target above 0.1 mb are reproduced by including couplings to the low-lying 2 and 3 states and the mutual and two-phonon excitations of these states. The calculations become more challenging as the fusing nuclei become softer and heavier, and excitations to mu...

Excitation of nuclear anharmonic vibrations in heavy-ion fusion reactions

We discuss the e ects of multi-phonon excitations on heavy-ion fusion reactions at energies near and below the Coulomb barrier, focusing especially on the role of anharmonicities. We carry out a systematic study of those e ects on the excitation function of the fusion cross section and on the fusion barrier distribution, by using the vibrational limit of the interacting boson model. We also ana...

Heavy Ion Fusion Sources*

In Heavy-Fusion and in other applications, there is a need for high brightness sources with both high current and low emittance. The traditional design with a single monolithic source, while very successful, has significant constraints on it when going to higher currents. With the Child-Langmuir current-density limit, geometric aberration limits, and voltage breakdown limits, the area of the so...

Hadronization in Heavy-ion Reactions

We present a model of fast hadronization of constituent quark matter in relativistic heavy ion collisions based on rate equations and capture cross sections in non-relativistic potential. We utilize a thermodynamically consistent approach with a non-ideal equation of state including correlation terms based on string phenomenology. We investigate strange and non-strange particle ratios observed ...

Nuclear Fragmentation Reactions and Heavy-Ion Therapy