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Spectator Matter in Collisions of Relativistic Deformed Nuclei

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Abstract

The Abrasion–Ablation Monte Carlo for Colliders (AAMCC) model is used to study the characteristics of spectator matter in central collisions of relativistic 238U nuclei, which are sensitive to the mutual orientation and the degree of deformation of the colliding nuclei. It is shown that the multiplicity of spectator neutrons and their forward-backward asymmetry substantially depend on the initial mutual orientation of 238U nuclei, which makes it possible to separate tip-body events with a high forward-backward asymmetry and a maximum multiplicity of spectator neutrons, as well as side-side events with a similar multiplicity, but with a minimal asymmetry. It is found that an increase in the quadrupole deformation parameter \({{\beta }_{2}}\) of 238U nuclei leads to a proportional increase in the multiplicity of spectator neutrons in tip-body events. Thus, the detection of spectator neutrons in collisions of relativistic deformed nuclei in an experiment can be used to study a degree of their deformation and to select collisions of a certain orientation.

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FUNDING

The study was supported by Russian Foundation for Basic Research, project no. 18-02-40035.

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Authors and Affiliations

  1. Moscow Institute of Physics and Technology (National Research University), 141701, Dolgoprudny, Moscow oblast, Russia

    N. Kozyrev, A. Svetlichnyi, R. Nepeivoda & I. Pshenichnov

  2. Institute for Nuclear Research, Russian Academy of Sciences, 117312, Moscow, Russia

    N. Kozyrev, A. Svetlichnyi, R. Nepeivoda & I. Pshenichnov

Authors
  1. N. Kozyrev
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  2. A. Svetlichnyi
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  3. R. Nepeivoda
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  4. I. Pshenichnov
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Correspondence to N. Kozyrev.

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Translated by M. Samokhina

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Kozyrev, N., Svetlichnyi, A., Nepeivoda, R. et al. Spectator Matter in Collisions of Relativistic Deformed Nuclei. Phys. Part. Nuclei 54, 605–612 (2023). https://doi.org/10.1134/S1063779623040214

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  • DOI: https://doi.org/10.1134/S1063779623040214

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