Measuring the Temperature of Hot Nuclear Fragments

Abstract

A new thermometer based on fragment momentum fluctuations is presented. This thermometer exhibited residual contamination from the collective motion of the fragments along the beam axis. For this reason, the transverse direction has been explored. Additionally, a mass dependence was observed for this thermometer. This mass dependence may be the result of the Fermi momentum of nucleons or the different properties of the fragments (binding energy, spin etc..) which might be more sensitive to different densities and temperatures of the exploding fragments. We expect some of these aspects to be smaller for protons (and/or neutrons); consequently, the proton transverse momentum fluctuations were used to investigate the temperature dependence of the source.

References in corpus (5)

• Nuclear multifragmentation and phase transition for hot nuclei
• The Quantum Nature of a Nuclear Phase Transition
• Thermal and Chemical Freeze-out in Spectator Fragmentation
• The Isospin Dependence Of The Nuclear Equation Of State Near The Critical Point
• Particle Identification in the NIMROD-ISiS Detector Array

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