STUDY OF TARGET FRAGMENTATION IN HEAVY ION INTERACTIONS AT 3.7A GeV

Abdelsalam, A.; Rashed, N.; Badawy, B. M.; El-Falaky, E.

doi:10.1142/9789814317511_0034

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“…Consequently, the produced compound nucleus will de-excite and decay by emitting this excess number of backward hadrons. Such a mechanism of compound target nucleus was discussed in experiments (29,30) . Therefore, regarding the nuclear limiting fragmentation beyond 1A GeV, the projectile energy cannot be considered an effective parameter in the backward production and consequently does not mean that, this system of particle production is a creation system.…”

Section: Multiplicity Distributionsmentioning

confidence: 99%

Interactions in nuclear emulsion detector irradiated by a-particle

Abdelsalam¹,

Abou-Moussa²,

Osman³

et al. 2014

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Using the multiplicity characteristics of the final state hadron, the shower particles emitted in the 4-pspace through 4He interactions with emulsion nuclei are studied in a few A GeV region. Basing on a universality of state, the multiplicity distributions, in the backward hemisphere of the space, are determined as a function of the target size. The shower particle multiplicity, while found to depend only on the target size in the backward hemisphere, depends on both the energy and system size in the forward hemisphere. It is seen that the shower particles are originated from two emission sources. One of both emits pion in the backward hemisphere, beyond the kinematic limits, as a target source particle regarding the limiting fragmentation hypothesis. The other is the main source which emits pion in the forward hemisphere as a result of a particle creation system. The results are analyzed in the framework of the Lund Monte-Carlo program code-events generating FRITIOF model.

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Section: Multiplicity Distributionsmentioning

confidence: 99%