2024-03-28T23:19:56Zhttps://eprints.lib.hokudai.ac.jp/dspace-oai/requestoai:eprints.lib.hokudai.ac.jp:2115/172142022-11-17T02:08:08Zhdl_2115_20061hdl_2115_153Molecular-orbital structure in neutron-rich C isotopesItagaki, N.Okabe, S.Ikeda, K.Tanihata, I.429The 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.American Physical SocietyJournal Articleapplication/pdfhttp://hdl.handle.net/2115/17214https://eprints.lib.hokudai.ac.jp/dspace/bitstream/2115/17214/1/PRC64-1.pdf0556-28131089-490XPhysical Review C6410143012001-05-30enginfo:doi/10.1103/PhysRevC.64.014301Copyright © 2001 American Physical Societypublisher