Abstract
The underlying structure of low-lying collective bands of atomic nuclei is discussed from a novel perspective on the interplay between single-particle and collective degrees of freedom, by utilizing state-of-the-art configuration interaction calculations on heavy nuclei. Besides the multipole components of the nucleon-nucleon interaction that drive collective modes forming those bands, the monopole component is shown to control the resistance against such modes. The calculated structure of corresponds to the coexistence between prolate and triaxial shapes, while that of exhibits a deformed shape with a strong triaxial instability. Both findings differ from traditional views based on vibrations. The formation of collective bands is shown to be facilitated from a self-organization mechanism.
- Received 24 July 2019
- Revised 4 October 2019
DOI:https://doi.org/10.1103/PhysRevLett.123.222502
© 2019 American Physical Society