The i11/2 f5/2 and i11/2 p3/2 neutron particle-hole multiplets in 208Pb
A. Heusler, G. Graw, R. Hertenberger, F. Riess, H. -F. Wirth, T. Faestermann, R. Krücken, J. Jolie, N. Pietralla, P. von Brentano
Abstract
Inelastic proton scattering via isobaric analog resonances allows to derive rather complete information about neutron particle-hole states. We applied this method to the doubly-magic nucleus 208Pb by measuring angular distributions of 208Pb(p, p') on top of the isobaric analog resonances in 209Bi with the Q3D magnetic spectrograph at München. We identify the six states of the i11/2 f5/2 multiplet and the four states of the i11/2 p3/2 multiplet in the energy range 4.6 MeV < Ex < 5.3 MeV. Firm spin assignments for the ten states are given, some of them new. Additional measurements of the reaction 207Pb(d, p) confirm the fragmented i11/2 p1/2 multiplet.
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