Constructing the nuclear caloric curve from thermal bremsstrahlung Original Research Article

The behavior of the emission of thermal bremsstrahlung with the reaction centrality has been studied in129Xe +natSn reactions at 50A MeV. A thermal hard photon component is present along the measured impact parameter range (0.1 ≤ b/bmax ≤ 0.6) showing the formation of a thermal equilibrated system. The temperature of the system (4.4 – 6.8 MeV) exhibits a lower dependence on the excitation energy (ε★ ≈ 2.8–8.7MeV) than the expected for a Fermi fluid.