Microscopic coupled-channel study of the ^6He+^6He Molecular Resonances in Highly-Excited ^12Be
Abstract
Recently, the breakup experiment of ^12Be into ^6He+^6He strongly indicates the existence of the exotic ``^6He+^6He molecular states'' in the 10 to 25 MeV excitation energy interval. In order to investigate the nuclear structure of these exotic molecular states, we performed a coupled-channel (CC) calculation of the ^6He+^6He system. We used the double-folding interactions based on the DDM3Y nucleon-nucleon interaction and the internal wave function of ^6He obtained by the microscopic α+n+n cluster model. Several ^6He+^6He molecular bands were obtained, which well coincide in energy and spin with the observed resonances. The channel coupling effects are not so strong in the high spins with J^π>=6^+. Therefore, the character of the calculated molecular bands can be interpreted in terms of the so-called ``weak-coupling states'' in which two interacting ^6He nuclei are weakly-coupled to each other. The decay width of the obtained resonances and the probability of the ^12Be_g.s. arrow ^6He+^6He breakup reaction will also be discussed.
- Publication:
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APS Meeting Abstracts
- Pub Date:
- October 2001
- Bibcode:
- 2001APS..HAW.DE008I