Signatures of Statistical Decay
D. Horn, G. C. Ball, D. R. Bowman, A. Galindo-Uribarri, E. Hagberg, R. Laforest, J. Pouliot, R. B. Walker
Abstract
The partition of decay energy between the kinetic energy of reaction products and their Q-value of formation is obtained in a statistical derivation appropriate to highly excited nuclei, and is shown to be in a constant ratio. We measure the kinetic energy fraction, R = ΣEkin/(ΣEkin + ΣQ0), over a wide range of excitation energy for well-defined systems formed in the Cl + C reaction at 35A MeV. Relationships between excitation energy, charged-particle multiplicity, and intermediate-mass-fragment multiplicity, observed in this work and in recent experiments by a number of other groups, follow from the derivation of the average kinetic energies and Q-values.
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