Projectile fragmentation at Fermi energies with transport simulations

Projectile fragmentation at Fermi energies is an important method to produce radioactive beams for the study of isospin asymmetric nuclear matter. Fragmentation is usually parametrized successfully by empirical phase space models. In this contribution we apply a microscopical method, semiclassical transport theory, to study in detail the reaction mechanism of the fragmentation process. We apply it to experimental data of 18O on 181Ta at E/A = 35 MeV measured in Dubna. We calculate consistently the excitation energy of the primary fragments and take into account their decay by a statistical model. It is found that the dissipative part of the fragment spectra is well described by transport theory. However, there are in addition important direct and collective contributions

NEW ISOTOPES : 29,30Mg, 31,32,33Al, 33,34,35,36Si, 35,36,37,38P, 39,40S AND 41,42Cl, PRODUCED IN BOMBARDMENT OF 232Th TARGET WITH 290 MeV 40Ar IONS

17 nouveaux nucléides ont été détectés et identifiés comme produits de la réaction 232Th + 40Ar (Elab = 290 MeV). L'identification des particules chargées a été faite en combinant l'analyse magnétique et la technique du télescope ƊE – E.17 new nuclides have been detected and identified as the products of the 232Th + 40Ar (Elab = 290 MeV) reaction. The charged particle identification system combining the magnetic analysis and the ƊE – E technique has been used