1. Temperatures of Exploding Nuclei
- Author
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V. Serfling, C.Schwarz, R.Bassini, M.Begemann-Blaich, S.Fritz, S.J.Gaff, C.Groß, G.Immè, I.Iori, U.Kleinevoß, G.J.Kunde, W.D.Kunze, U.Lynen, V.Maddalena, M.Mahi, T.Mòhlenkarnp, A.Moroni, W.F.J.Müller, C.Nociforo, B.Ocker, T.Odeh, F.Petruzzelli, J.Pochodzalla, G.Raciti, G.Riccobene, F.P.Romano, Th.Rubehn, A.Saija, M.Schnittker, A.Schüttauf, W.Seidel, C.Sfienti, W.Trautmann, A.Trzcinski, G.Verde, A.Wörner, Hongfei Xi, and B.Zwieglinski
- Subjects
Physics ,Hydrogen ,Nuclear Theory ,General Physics and Astronomy ,chemistry.chemical_element ,FOS: Physical sciences ,Internal temperature ,chemistry ,Yield (chemistry) ,Lithium ,Atomic physics ,Nuclear Experiment (nucl-ex) ,Adiabatic process ,Nuclear Experiment ,HEAVY-ION COLLISIONS ,AR-40+AU-197 REACTIONS ,EMISSION TEMPERATURES ,MOLECULAR-DYNAMICS ,MULTIFRAGMENTATION ,MATTER ,FRAGMENTS ,SYSTEM ,BLAST ,WAVE ,Helium ,Energy (signal processing) - Abstract
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, Comment: 10 pages, RevTeX with 4 included figures; Also available from http://www-kp3.gsi.de/www/kp3/aladin_publications.html
- Published
- 1998
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