open access

https://hdl.handle.net/2115/17214

Molecular-orbital structure in neutron-rich C isotopes

英語

2001-05-30

American Physical Society

Physical Review C

64(1)

014301

The moleculelike structure of the C isotopes (A=12, 14, 16) is investigated using a microscopic α+α+α+n+n+　… model. The valence neutrons are classified based on the molecular-orbit model, and both π orbit and σ orbit are introduced around three α clusters. The valence neutrons which occupy the π orbit increase the binding energy and stabilize the linear chain of 3α against the breathinglike breakup. However, 14C with the π orbit does not show a clear energy minimum against the bendinglike path. The combination of the valence neutrons in the π and σ orbits is promising to stabilize the linear-chain state against the breathing and bending modes, and it is found that the excited states of 16C with the (3/2π-)2(1/2σ-)2 configuration for the four valence neutrons is one of the most promising candidates for such a structure.

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Copyright © 2001 American Physical Society

0556-2813

1089-490X