THE ROLE OF DEEP INELASTIC PROCESSES IN NUCLEAR PHYSICS: EXPERIMENTAL AND THEORETICAL ASPECTS OF DEEP INELASTIC REACTIONS

Lectures given at the Post-Conference School on Selected Topics in Heavy Ion Physics Intnat'l.Conf.on Dynamical Properties of Heavy Ion Reactions - Univ. of the Witwatersrand, Johannesburg, South Africa August 1978 — NOTICE Thu icpiHl *ai picpaicd as an account >'l wink ipitnuued by the United S u i (iovernment Neithei tlie I'mini Siaict nm i\>t UriiiM Sutei Ikparinwnt nt Vnrrg>, noi any til ttieii «mpto>tn, mil my ^ * laniiiL't.ui, (ubtonliaetiHi. or iheu employee!, makci ar.\ Mananty, exoiets oi implied, ot juum» an> lepal Uabilil> or icspo Jibillty Tot lhe*«uiacy,ftinipletencii m uuiulneu of any information, apparatus, puiduci ui j puneu duel used. tn represent) ihai ns uw v.milil m>l | mlnngr prtvaiely nwnetl npin* llE THE ROLE OF DEEP INELASTIC PROCESSES IN NUCLEAR PHYSICS: EXPERIMENTAL AND THEORETICAL ASPECTS OF DEEP INELASTIC REACTIONS L. G. M o r e t t o Nuclear Science Division Lawrence Berkeley Laboratory University of California Berkeley, California 94720 ABSTRACT The collective mrdes excited in deep-inelastic reactions and t h e i r natural hierarchy provided by t h e i r c h a r a c t e r i s t i c relaxation times i s described. The relaxation of the mass asymmetry mode is Charge distributions and discussed in terms of a diffusion process. angular distributions as a function of Z calculated with t h i s model are i n good agreement with experimental data. This diffusion model also t r e a t s the transfer of energy and angular momentum in terms of p a r t i c l e transfer, and i s successfully compared with experimental y-ray m u l t i p l i c i t i e s as a function of both Q- tralue and mass asymmetry. The angular momentum transfer i s again considered in connection with the sequential fission of heavy, deep-inelastic fragments and the excitation of collective modes in the exit channel i s considered. The role of the giant El mode in the equilibration of the neutron-to-proton r a t i o is discussed.