Critical Behavior in the Disassembly of Light Nuclei

Dr. Yu-Gang Ma

Cyclotron Institute, Texas A&M University and  Shanghai Institute of Nuclear Research, Chinese Academy of Sciences

A wide variety of observables indicate that maximal fluctuations in the
disassembly of hot nuclei with A ~ 36 occur at an excitation energy of
5.6 +  0.5 MeV/u and temperature of 8.3 +  0.5 MeV. Associated with this
point of maximal fluctuations are a number of quantitative indicators of
apparent critical behavior. The associated caloric curve does not appear
to show a plateau such as that seen for heavier systems. This suggests
that, in contrast to similar signals seen for apparent first order
liquid-gas transitions in heavier nuclei, the observed behavior in these
very light nuclei is associated with a transition much closer to the
critical point.