Isotopic Dependence of the Nuclear Caloric Curve

Details Isotopic Dependence of the Nuclear Caloric Curve Isotopic Dependence of the Nuclear Caloric Curve

2009-03-10

arxiv.org/abs/0903.1772v1

Phys.Rev.Lett.102:152701,2009

Physics

Nuclear Physics

Nuclear Experiment

11 pages, 3 figures, accepted for publ. in Phys. Rev. Lett

Scientific paper

10.1103/PhysRevLett.102.152701

The A/Z dependence of projectile fragmentation at relativistic energies has been studied with the ALADIN forward spectrometer at SIS. A stable beam of 124Sn and radioactive beams of 124La and 107Sn at 600 MeV per nucleon have been used in order to explore a wide range of isotopic compositions. Chemical freeze-out temperatures are found to be nearly invariant with respect to the A/Z of the produced spectator sources, consistent with predictions for expanded systems. Small Coulomb effects (\Delta T \approx 0.6 MeV) appear for residue production near the onset of multifragmentation.

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