Early signal of emerging nuclear collectivity in neutron-rich ${}^{129}$Sb

T. J. Gray, J. M. Allmond, A. E. Stuchbery +20

Radioactive ${}^{129}$Sb, which can be treated as a proton plus semi-magic ${}^{128}$Sn core within the particle-core coupling scheme, was studied by Coulomb excitation. Reduced electr…