Search for magnetic dipole strength and giant spin-flip resonances in heavy nuclei

A description is given of the use of high resolution (n, n) scattering and the (p, n) reaction as tools to investigate highly excited states with emphasis on information pertaining to magnetic dipole strength and giant spin-flip resonances in heavy nuclei. It is shown how the ability to uniquely determine the spins and parities of resonances observed in neutron scattering has been instrumental to an understanding of the distribution of M1 strength in sup(207,208)Pb. Some recent results of (p, n) studies with intermediate energy protons are discussed. Energy systematics of the giant Gamow-Teller (GT) resonance as well as a new Δl = 1, ΔS = 1 resonance with J sup(π) = (1,2)- are presented. It is shown how the (p, n) reaction might be useful to locate M1 strength in heavy nuclei. (author)