Characteristics of alpha projectile fragments emission in interaction of nuclei with emulsion

Abstract

The properties of the relativistic alpha fragments produced in interactions of 84 Kr at around 1 A GeV in nuclear emulsion are investigated. The experimental results are compared with the similar results obtained from various projectiles with emulsion interactions at different energies. The total, partial nuclear crosssections and production rates of alpha fragmentation channels in relativistic nucleus-nucleus collisions and their dependence on the mass number and initial energy of the incident projectile nucleus are investigated. The yields of multiple alpha fragments emitted from the interactions of projectile nuclei with the nuclei of light, medium and heavy target groups of emulsion-detector are discussed and they indicate that the projectile-breakup mechanism seems to be free from the target mass number. It is found that the multiplicity distributions of alpha fragments are well described by the Koba-Nielsen-Olesen (KNO) scaling presentation. The mean multiplicities of the freshly produced or newly created charged secondary particles, normally known as shower and secondary particles associated with target in the events where the emission of alpha fragments were accompanied by heavy projectile fragments having Z ³ 3 seem to be constant as the alpha fragments multiplicity increases, and exhibit a behavior independent of the alpha fragments multiplicity.

Characteristics study of projectile’s lightest fragment for 84Kr36–emulsion interaction at around 1 A GeV

“…To make sure that we are following primary track first we followed the track in the backward direction till the edge of the plate. In the volume scanning methods, the information is collected through strip by strip scanning [6][7][8]. The first interaction / event observed are the primary interaction and emitted particles are the secondary one.…”

Two source emission behavior of projectile fragments alpha in 84Kr interactions at around 1 GeV per nucleon

“…There are two standard methods for scanning of the NED that are explained in Ref. [9]. A total of 600 inelastic interactions of 84 Kr nuclei have been picked up and the charge and angle measurements of projectile fragments of these events have been done.…”

Analysis of Various Projectile Interactions with Nuclear Emulsion Detector Nuclei at ~1 GeV per Nucleon Using Coulomb Modified Glauber Model

“…The excited target residuals nucleus come back to the initial state by losing their energy and attain thermal equilibrium by emitting the nuclear material in the form of fragments. These target fragments are known as black particles (N b ) [11][12]. These black particles have relative velocities (ν/c) and kinetic energies less than 0.3c and less than 26 MeV, respectively.…”