New Experimental Results Supporting the Hypothesis of the Excitation of Collective Modes in the exp 40 Ca+ exp 40 Ca Reaction

摘要

Steps in the gamma -ray multiplicity as function of the excitation energy have been observed in coincidence with the incompletely relaxed part of the energy spectra of fragments emitted in the reaction exp 40 Ca+ exp 40 Ca at 400 MeV. Excitation energies and angular dependence of these variations suggest that they are correlated with the excitation of high energy collective modes through a rather direct process in the early stages of the reaction. l-values of this excitation mode are discussed. (Atomindex citation 10:481604)