A novel visage of molecular resonances in 12C + 12C

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

Uegaki, E.^1 ; Abe, Y.^2

Graduate School of Engineering Science, Akita University, Akita

010-8502, Japan^1

Research Center for Nuclear Physics, Osaka University, Ibaraki

567-0047, Japan^2

关键词: Coriolis coupling;    Excitation function;    Molecular ground state;    Molecular resonances;    Physical pictures;    Quantum numbers;    Rotational motion;    Spin vectors;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/863/1/012048/pdf
DOI  :  10.1088/1742-6596/863/1/012048

来源: IOP

【 摘 要 】

Resonances observed in the12C +12C collisions are studied by the molecular model. Firstly, normal-modes analysis made around the equilibrium equator-equator touching configuration gives a basic insight into dynamics of the system. The quantum numbers of the states also indicate rotational motions of the constituent12C nuclei, which relate the normal modes to the corresponding inelastic12C +12C channels. Next, low-lying 11 states are taken up as bases, and Coriolis coupling has been diagonalized. Many excited states are obtained with intermediate widths, which is just in accord with the experimental observation. For example, the second and third excited states have characteristic feature as low-lying mutual 2+excitation with the spin vectors of12C nuclei along the molecular z′-axis. Those states appear very close to the molecular ground state with the higher spin of ΔJ = 2, to form a bunch. Resultant excitation functions are surprisingly in good agreement with the experiments, which lights up a new physical picture of molecular structures of the high-spin12C +12C resonances.