Intermediate energy proton and light-ion scattering

Abstract

A review is presented of recent (1979-81) developments in the field Of intermediate-energy protcn and light-ion scattering from nuclel. New theoretical and calcul?tional t?chntques of particular interest to experimentdlists are discusseci, Emphasis is placed on topics in nuclear structure physics-giant resonances, pion-condensation precursor phenomena, and polarization transfer (spin-flip) experiments-where intermediate ener"gy proton and light-ion scattering has made new and unique contributions. 3. Nuclear Structure and ?eaction Giact Resonarlces Delta-isobar-hole configurations Pion-condensation precursors Measurement of the Q p~rameter Spin-flip measurements 4. S mm ry having no central unifying theme. Although there is some underlying unl~y not appa?ent in the titles, the first Impression is essentially correct, After al], proton and light-ion scattering is a tool which allows US to investigatc ertain properties of nuclei and nuclear interactions, not an end In itself. A very important point, moreover, which has been emphasized recent ly,l is that the most effective use of this tool is often in conjunction with other tools, specifically the scattering of mesonic and electromagnetic probes, irl the pu~~~:t of a common goal in nuclear structure physics, A notable absence in th~list in t~ble I is the subject of neutron radii, This omission ret' lects my view that the field of elastic scattering is now at the stage of asking, "Just how rel table are these calculations, anyway?'" It alSO refleCtS my prejudice that neutron radii have been talked abcut enough recent ly.' 2. The N-N Interaction and Recent Theoretical Developments Fundamental to the use of proton and liqht-ion scattering as a probe of nuclear structure are the theories employed to describe the reaction. The founj~tions Of the co~only used multipl? scattering theories were laid down over 20 years ago.' New developments continu~to occur and have been reviewed recently.' In this section I wI1l (Iiscuss a few developments from