Emission characteristics of the projectile fragments at relativistic energy

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 ~4 o 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.

Multiplicity distributions of shower particles and target fragments in 84 Kr 36–emulsion interactions at 1 GeV per nucleon

“…A stack of high sensitive NIKFI BR-2 nuclear emulsion pellicles of dimensions 9.8×9.8×0.06 cm 3 were exposed horizontally by 84 Kr 36 ion of kinetic energy ~1 GeV per nucleon [3][4][5][6]. The exposure was performed at Gesellschaft fur Schwerionenforschung (GSI) Darmstadt, Germany.…”

“…The size and range of ionization sensitivity of NED depends upon nature and need of the experiments. The interaction of nucleons (such as 84 Kr 36 ) with NED's target at relativistic energy reveals the picture of the hadrons -nucleus collisions [3][4][5][6][7][8]. The recoil target nucleons are emitted shortly after the passage of leading hadrons.…”

Target dependence of clan model parameter in 84 Kr 36 – Emulsion interactions at 1 GeV per nucleon

“…The incident projectile will interact with either one of the targets. These emulsion targets are generally classified into three major classes which are combination of AgBr nuclei having averaged A T = 94 for heavy; CNO nuclei having averaged A T = 14 for medium and the free hydrogen nucleus having A T = 1 for light targets [6,16]. The number of heavily ionizing charged particles depends upon the target breakup.…”

“…The number of heavily ionizing charged particles depends upon the target breakup. The target separation was achieved by applying restrictions on the number of heavily ionizing charge particles and on residual range of black particles emitted in each event [6,16].…”

“…The variation of χ with respect to . The experimental data points are from16 O at 4.5 GeV/c[5],22 Ne at 4.1 GeV/c[5], 28 Si at 4.5 GeV/c[5], 32 S at 4.5 GeV/c[5],32 S at 200 GeV/c [6], 84 Kr at 0.95 A GeV [Present work]. The dotted and solid lines are fitting of data points with NBD model and minimal model, respectively.…”