What is the physics behind the 3He-4He anomaly?
W. Neubert1 - A.S. Botvina2,3
1 Institut für Kern- und Hadronenphysik, Forschungszentrum Rossendorf, 01314 Dresden,
Germany
2 Istituto Nazionale di Fisica Nucleare, 40126 Bologna, Italy
3 Institute for Nuclear Research, Russian Academy of Science, 117312 Moscow, Russia
Received: 24 September 1999 / Revised version: 22 November 1999 Communicated by B. Povh
Abstract
We show that coalescence of nucleons emitted prior to
thermalization in
highly excited nuclei can explain the anomaly of kinetic energies of
helium clusters. A new coalescence algorithm has been included in
the statistical approach to
nuclear reactions formerly used to describe intermediate mass fragment
production.
PACS
25.70.-z Low and intermediate energy heavy-ion reactions -
25.70.Pq Multifragment emission and correlations
Copyright Società Italiana di Fisica, Springer-Verlag 2000
