Emission Characteristics of the Projectile Fragments at Relativistic Energy

TL;DR

This study investigates the emission angles and momentum transfer of projectile fragments from a relativistic krypton-84 nucleus interacting with emulsion, revealing charge-dependent angular distributions and decay processes of fragments.

Contribution

It provides detailed analysis of emission angles, charge effects, and decay signatures of projectile fragments at relativistic energies, which was not extensively studied before.

Findings

Angular distribution is symmetrical for lighter fragments.

Symmetry decreases with increasing charge of fragments.

Small peaks indicate decay of heavy fragments or other processes.

Abstract

A projectile (84^Kr_36) having kinetic energy around 1 A GeV was used to expose NIKFI BR-2 emulsion target. A total of 700 inelastic events are used in the present studies on projectile fragments. The emission angle of the projectile fragments are strongly affected by charge of the other projectile fragments emitted at same time with different emission angle is observed. The angular distribution studies show symmetrical nature for lighter charge projectile fragments. The symmetrical nature decreased with the charge of projectile fragments. At ~4o of emission angle for double charge projectile fragments, the momentum transfer during interaction is similar for various target species of emulsion were observed. We also observed a small but significant amplitude peaks on both side of the big peak for almost all light charge projectile fragments having different delta angle values. It reflects that there are few percent of projectile fragments that are coming from the decay of heavy projectile fragments or any other process.