Peculiarities of quasifission reactions in heavy ion collisions

TL;DR

This paper investigates quasifission reactions in heavy ion collisions, analyzing mass and angular distributions to understand reaction mechanisms and explaining recent experimental observations.

Contribution

It provides a detailed analysis of quasifission in heavy ion collisions using the dinuclear system model, highlighting the role of orbital angular momentum.

Findings

Quasifission contributes to mass-symmetric regions at high angular momentum.

System rotation can cause projectile-like fragments to appear in the forward hemisphere.

Results explain recent experimental observations of quasifission phenomena.

Abstract

The probability of the formation and decay of a dinuclear system is investigated for a wide range of relative orbital angular momentum values. The mass and angular distributions of the quasifission fragments are studied to understand the reaction mechanisms of the heavy ion collision of $^{78}$Kr(10$A$ MeV) + $^{40}$Ca within dinuclear system model. The quasifission products are found to contribute to the mass-symmetric region of the mass distribution in collisions with a large orbital angular momentum. The analysis of mass and angular distributions of quasifission fragments shows the possibility of the $180^\circ$ rotation of the system so that projectile-like products can be observed in the forward hemisphere with large cross sections, which can explain the phenomenon observed recently in the ISODEC experiment.