Speaker
Description
The ultrarelativistic heavy ions collisions with fixed targets gives opportunity to verify the usability of nuclear models. The high energy particles produced in the participant zone in the Quark-Gluon plasma (QGP) are interacting electromagnetically with charged remnants- spectators and changes trajectories of the charged particles [1,2]. Studying de-excitation processes such as evaporation, intermediate-mass fragment (IMF) emission, fission, or multifragmentation helps us better understand reactions currently being conducted or planned in experiments such as NA61/SHINE, ALICE,or PHENIX.
To analyze the fragmentation of the excited spectator nuclei,
the Monte Carlo Abrasion-Ablation model (ABRABLA) [3] was used.
Consequently, these simulations are also useful for validating
models that describe the de-excitation of exotic nuclei.
The results from simulations of spectator, including final product mass/charge
distributions, yield distributions across different de-excitation
channels, and multiplicity distributions of protons and neutrons
emitted by the spectators are shown. The calculations were performed for
Ar-Sc, Xe-La and Pb-Pb collisions at $p_{{beam}} = 20, 30, 150 AGeV/c$,
corresponding to reactions currently analyzed by the NA61/SHINE
collaboration at the CERN SPS.
[1] K. Mazurek, A. Szczurek, C. Schmitt, P.N. Nadtochy, Phys. Rev. C 97 (2018) 024604.
[2] K. Mazurek, M. Kłusek-Gawenda, A. Szczurek, Eur. Phys. J. A 58 (2022) 245.
[3] J.-J. Gaimard and K.-H. Schmidt, Nucl. Phys. A 531 (1991) 709-745.