INCLUSIVE (P,N) AND (HE-3,T) REACTIONS ON NUCLEI IN THE QUASI-ELASTIC AND DELTA-ISOBAR EXCITATION REGION

Starting from a formalism of effective numbers for the inclusive integral cross sections of the (p, n) reaction with the formation of quasi-elastic and DELTA-isobar nuclear excitation we obtain, without free parameters, a satisfactory quantitative description of existing experimental data. The theory gives a factorized form, which allows for a useful separation of the reaction mechanism and the structure of the light and heavy reaction partners. The use of this formalism has been successful only with heavy reaction partners and with only minor modifications of the (He-3, t) reactions at intermediate energies. It is argued from the similarity of the cross sections for the (p, n) and (He-3, t) reactions obtained by removing the form factors of He-3 from the cross sections and by bringing the experimental data for different energies to the same energy. It is shown that the reaction mechanism for the (p, n) and (He-3, t) processes is, in principle, essentially the same.