Abstract
We investigate the origin of subthreshold production in heavy ion collisions at intermediate energies. In particular we study the influence of the pion induced creation processes. We find that this channel shows a strong dependence on the size of the system, i.e., the number of participating nucleons as well as on the incident energy of the reaction. In an energy region between 1 and 2 GeV/nucleon the pion induced processes essentially contribute to the total yield and can even become dominant in reactions with a large number of participating nucleons. Thus we are able to reproduce recent measurements of the KaoS Collaboration for 1 GeV/nucleon Au on Au reactions adopting a realistic momentum dependent nuclear mean field.
- Received 14 February 1997
DOI:https://doi.org/10.1103/PhysRevC.56.R606
©1997 American Physical Society