The Nuclear Response in Delta-Isobar Region in the (${}^3$He,t) Reaction

Abstract

The excitation of a $\Delta$-isobar in a finite nucleus in charge--exchange (${}^3$He,t) reaction is discussed in terms of a nuclear response function. The medium effects modifying a $\Delta$- and a pion propagation were considered for a finite size nucleus. The Glauber approach has been used for distortion of a ${}^3$He and a triton in the initial and the final states. The effects determining the peak positions and its width are discussed. Large displacement width for the $\Delta$ - h excitations and considerable contribution of coherent pion production were found for the reaction on ${}^{12}$C.

29 pages including 8 figures, IU/NTC 92-34

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