Direct measurements reveal that the neutron-deficient isotope 190Pb can adopt three different deformations near the ground state. The present work identifies the collective yrast band as predominantly oblate, the non-yrast band as predominantly prolate, and discovers a candidate spherical \({2}_{3}^{+}\) state at 1281 keV.
- Adrian Montes Plaza
- Janne Pakarinen
- George L. Zimba