Observation of the octupole septuplet of 209Bi in inelastic proton scattering

Abstract

Magnetic analysis of 21 MeV protons inelastically scattered from the 2.6 Me octupole state of ^{206, 207, 208}Pb and ²⁰⁹Bi is reported. In the odd-A nuclei this state splits into a close multiplet with the number of levels in agreement with the predictions of the weak coupling model.