The Isospin Thermometer - A New Method to Determine
نویسندگان
چکیده
The neutron excess of heavy fragmentation products is analysed in order to extract the excitation energy at the beginning of the evaporation stage of the reaction. The result gives indications for a break-up stage also in reactions in which heavy fragments are formed. The freeze-out temperature, determined with this approach, agrees with the value of about 5 MeV found in light fragment production by the caloric curve over a large range of excitation energy induced.
منابع مشابه
Production of neutron-rich heavy residues and the freeze-out temperature in the fragmentation of relativistic U projectiles determined by the isospin thermometer
Isotope yields of heavy residues produced in collisions of U with lead at 1⋅A GeV show indications for a simultaneous break-up process. From the average N-over-Z ratio of the final residues up to Z = 70, the average limiting temperature of the break-up configuration at freeze out was determined to T -thermometer method. Consequences for the understanding of other phenomena in highly excited nuc...
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