Abstract
The author studies the distribution of spin-isospin strength for a stretched excitation in an exact finite-nucleus treatment for a medium nucleus over a wide range of the momentum transfer. He considers both the spin-transverse and spin-longitudinal channels. The special characteristics of the stretched state in the present context are emphasised, and their effect on the renormalisation of spin-isospin operators is discussed. The quantities of interest (self-energies, response functions and renormalised nuclear matrix elements) differ from those studied previously in low-spin states. Available data support his results; it is pointed out that it would be interesting to see new data at high momentum transfers and a separated spin-longitudinal response. The results are sensitive to the value of g' quantitatively as well as qualitatively. The results are compared with calculations based on nuclear matter and the local density approximation (LDA), and important differences are pointed out. It is concluded that his results may also be useful in understanding a recent inclusive (p,p') experiment.