Temperatures of Exploding Nuclei

Details Temperatures of Exploding Nuclei Temperatures of Exploding Nuclei

1998-01-22

arxiv.org/abs/nucl-ex/9801006v1

Phys.Rev.Lett. 80 (1998) 3928-3931

Physics

Nuclear Physics

Nuclear Experiment

10 pages, RevTeX with 4 included figures; Also available from http://www-kp3.gsi.de/www/kp3/aladin_publications.html

Scientific paper

10.1103/PhysRevLett.80.3928

Breakup temperatures in central collisions of 197Au + 197Au at bombarding energies E/A = 50 to 200 MeV were determined with two methods. Isotope temperatures, deduced from double ratios of hydrogen, helium, and lithium isotopic yields, increase monotonically with bombarding energy from 5 MeV to 12 MeV, in qualitative agreement with a scenario of chemical freeze-out after adiabatic expansion. Excited-state temperatures, derived from yield ratios of states in 4He, 5Li, 6Li, and 8Be, are about 5 MeV, independent of the projectile energy, and seem to reflect the internal temperature of fragments at their final separation from the system. PACS numbers: 25.70.Mn, 25.70.Pq, 25.75.-q

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