Covalent Binding with Neutrons on the Femto-scale

11th International Conference on Clustering Aspects of Nuclear Structure and Dynamics

Von Oertzen, W.^1 ; Kanada-En'Yo, Y.^2 ; Kimura, M.^3

Helmholtz-Zentrum Berlin, Hahn-Meitner Platz, Berlin

14109, Germany^1

Department of Physics, Kyoto University, Kyoto, Japan^2

Hokkaido University, Sapporo

001-0021, Japan^3

关键词: Binary molecules;    Covalent binding;    Decoupling effects;    Molecular band;    Molecular orbital structures;    Moments of inertia;    Quantum numbers;    Rotational band;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/863/1/012066/pdf
DOI  :  10.1088/1742-6596/863/1/012066

来源: IOP

【 摘 要 】

In light nuclei we have well defined clusters, nuclei with closed shells, which serve as centers for binary molecules with covalent binding by valence neutrons. Single neutron orbitals in light neutron-excess nuclei have well defined shell model quantum numbers. With the combination of two clusters and their neutron valence states, molecular two-center orbitals are defined; in the two-center shell model we can place valence neutrons in a large variety of molecular two-center states, and the formation of Dimers becomes possible. The corresponding rotational bands point with their large moments of inertia and the Coriolis decoupling effect (for K = 1/2 bands) to the internal molecular orbital structure in these states. On the basis of these the neutron rich isotopes allow the formation of a large variety molecular structures on the nuclear scale. An extended Ikeda diagram can be drawn for these cases. Molecular bands in Be and Ne-isotopes are discussed as text-book examples.