Bulg. J. Phys. vol.34 no.s1 (2007), pp. 100-113



Signatures for Multifragmentation in Spallation Reactions

K.-H. Schmidt
GSI, Planckstr. 1, D-64291 Darmstadt, Germany
Abstract. The traditional theoretical description of spallation reactions by intra-nuclear cascade codes, pre-equilibrium-emission models and evaporation codes disregards phenomena related to the thermal expansion of the excited system. When the system is sufficiently heated, a simultaneous decomposition of the expanded system into several fragments occurs, which is interpreted as a manifestation of spinodal instabilities in the dynamic evolution of the system. Some salient experimental signatures of this multifragmentation phenomenon are described.

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