Non compound nucleus fission events and standard saddle-point statistical model

TL;DR

This paper analyzes experimental data on fission fragment anisotropies in heavy-ion reactions, examining the role of entrance channel asymmetries and the validity of the standard saddle-point statistical model, highlighting non compound nucleus fission contributions.

Contribution

It investigates the influence of projectile and target mass numbers on anisotropy behavior and assesses the standard model's applicability in different reaction systems.

Findings

Non compound nucleus fission contributes significantly in systems with anomalous anisotropy.

The standard saddle-point statistical model's validity varies with entrance channel asymmetries.

Mass asymmetry parameters influence the angular anisotropy outcomes.

Abstract

The large body of experimental data on the fission fragments anisotropies are analyzed in several heavy-ion induced fission reaction systems. The entrance channel mass asymmetry parameters of these systems put on the both sides of the Businaro-Gallone mass asymmetry parameters. The role of the mass numbers of the projectile and the target in the prediction of a normal or an anomalous behavior in angular anisotropy, as well as the validity of standard saddle-point statistical model are considered. The average contribution of non compound nucleus fission for the systems with an anomalous behavior in anisotropy are also determined. PACS numbers: 25.70.Jj *Corresponding author: s.soheyli@basu.ac.ir