Observation of $\gamma$-vibrations and alignments built on non-ground-state configurations in 156Dy

S. N. T. Majola, D. J. Hartley, L. L. Riedinger +25

The exact nature of the lowest $K^{\pi }=2_{\gamma }^{+}$ rotational bands in all deformed nuclei remains obscure. Traditionally they are assumed to be collective vibrations of the nuclear shape…