Target productions in forward and backward hemispheres in the interactions of 28Si-EM at 14.6A GeV

Abdelsalam, A.; El–Nagdy, M. S.; Abdalla, Ahmed M.; Saber, A.

doi:10.1142/s0218301315500846

Cited by 5 publications

(1 citation statement)

References 33 publications

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“…The third part is the nuclear material that is due to the residual target nucleus at frame of the target. It is characterized by slow and evaporated fragments emitted in isotropic angles independent on the direction of the incident projectile [8].…”

Section: Introductionmentioning

confidence: 99%

Channels of projectile fragmentation of¹⁶O nucleus in nuclear emulsion

et al. 2018

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Experimental data are presented on the projectile fragments emitted from non-central collisions of 3.7 A GeV 16 O projectiles with nuclear emulsion. Charges of all projectile fragments are measured carefully and identified using δ-ray distributions. Each distribution is fitted by Gaussian shape and represented one of the possible charges of projectile fragments. Topology of 16 O fragmentation is reported and compared with that obtained at 60 A GeV. The multiplicity distributions for 16 O projectile fragments with charge 3Z7 are studied and it classified according to the size of the target nucleus. In this range of energy, the mechanism responsible for projectile fragmentation is independent on its energy. Experimental observations proved that there is high probability for production α-clusters than all other nuclear fragments. The production rate of α-clusters fragments due to 16 O fragmentations is studied at range of energies 2-200 A GeV. The dependence of α-clusters on target components (CNO and AgBr) is formulated. Experimental data indicates that α-cluster represents the main unit of the structure of atomic nucleus.

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Section: Introductionmentioning

confidence: 99%

Channels of projectile fragmentation of¹⁶O nucleus in nuclear emulsion

et al. 2018

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Possible mechanisms for production of slow target fragments

Abdelsalam

El–Nagdy

Abdalla

et al. 2018

Int. J. Mod. Phys. E

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In this paper, we investigate the possible mechanisms, which are responsible for the production of slow target fragments with energy [Formula: see text][Formula: see text]MeV that are emitted from interactions of [Formula: see text]Si nucleus with emulsion nuclei at energy 14.6[Formula: see text]GeV per nucleon. Angular distributions of slow fragments are compared with the corresponding results from collisions of 1H, 3He, 4He, 7Li and [Formula: see text]C with emulsion at the energy range 2.2–3.7[Formula: see text]A[Formula: see text]GeV. We investigate the effects of both projectile energy and mass number on the angular distributions for slow secondary charged fragments called gray and black track producing particles. The average emission angles are found to be [Formula: see text] and [Formula: see text] for gray and black tracks, respectively. These values are nearly constant for all compared experiments. There are two different mechanisms of gray particle production in forward and backward directions while there is a single symmetric mechanism for black particles in both directions. The temperatures are found to be 58 and 6[Formula: see text]MeV for systems of emissions for gray and black particles, respectively. There are strong effects of target size on those mechanisms. The emission system of these particles becomes slower and shows low temperature with the increase in volume of target nucleus.

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Emission characteristics of the target fragments at relativistic energy

Singh

Karmakar

Singh

2022

Int. J. Mod. Phys. E

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In this recent work, we present the characteristic of the emission of the black particles ejected with [Formula: see text] [Formula: see text] [Formula: see text] and [Formula: see text] [Formula: see text][Formula: see text] i.e., in the forward and backward hemispheres, respectively. For the multiplicity variation study of black particles, we have considered the interaction of [Formula: see text]Kr beam with the CNO, AgBr target present in the nuclear emulsion detector. After doing the analysis of the data, we have found that the emission possibility of black particle is greater in the forward hemisphere (FHS) angle whereas in the backward hemisphere (BHS) angle, it is quite low. Along with this, we have also found that the emission probability of black particles does not posses any relation with projectile mass as well as with the incident energy. In this work, we have also studied the characteristics of shower and et al. particles using a new parameter Q (total charge [Formula: see text] of the outgoing projectile fragments emitted in forward cone [Formula: see text], here Z denotes charge, and PF denotes Projectile Fragment) instead of impact parameter to distinguish the different type of collision for two interacting nuclei. The observation from this study suggests that the emission probability of the shower particles as well as gray particles increase as the value of Q decreasing (i.e., as we move from peripheral to central colisions). The results of this work are also compared with the context of other experimental observations and it seems to be relevant.

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Target productions in forward and backward hemispheres in the interactions of 28Si-EM at 14.6A GeV

Cited by 5 publications

References 33 publications

Channels of projectile fragmentation of¹⁶O nucleus in nuclear emulsion

Channels of projectile fragmentation of¹⁶O nucleus in nuclear emulsion

Possible mechanisms for production of slow target fragments

Emission characteristics of the target fragments at relativistic energy

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Target productions in forward and backward hemispheres in the interactions of 28Si-EM at 14.6A GeV

Cited by 5 publications

References 33 publications

Channels of projectile fragmentation of16O nucleus in nuclear emulsion

Channels of projectile fragmentation of16O nucleus in nuclear emulsion

Possible mechanisms for production of slow target fragments

Emission characteristics of the target fragments at relativistic energy

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Channels of projectile fragmentation of¹⁶O nucleus in nuclear emulsion

Channels of projectile fragmentation of¹⁶O nucleus in nuclear emulsion