Application of the coalescence model to deuterons in central58Ni + 58Ni collisions between 1A and 2A GeV

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Abstract

In the context of the coalescence model and the density-matrix formalism, the radii of the excited volume at chemical freeze-out for central 58Ni + 58Ni collisions are extracted by using the published transverse momentum spectra of deuterons at incident beam energies from 1A to 2A GeV. The freeze-out radii from the coalescence model are in fair agreement with those from the pion Hanbury-Brown-Twiss analysis for the same collsion system in the same beam energy range. Furthermore, the radii are much larger than the sizes of the projectile and the target nuclei, supporting a significant expansion of the participant fireball before freeze-out. The freeze-out baryon densities are estimated to be about one third of the normal nuclear-matter density.

Original languageEnglish
Pages (from-to)79-83
Number of pages5
JournalJournal of the Korean Physical Society
Volume34
Issue number1
Publication statusPublished - 1999

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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