3alpha clustering in the excited states of 16C

Abstract

The alpha cluster states of 16C are investigated by using the antisymmetrized molecular dynamics. It is shown that two different types of alpha cluster states exist: triangular and linear-chain states. The former has an approximate isosceles triangular configuration of alpha particles surrounded by four valence neutrons occupying sd-shell, while the latter has the linearly aligned alpha particles with two sd-shell neutrons and two pf-shell neutrons. It is found that the structure of the linear-chain state is qualitatively understood in terms of the 3/2 pi- and 1/2 sigma- molecular orbit as predicted by molecular-orbital model, but there exists non-negligible Be+alpha+2n correlation. The band-head energies of the triangular and linear-chain rotational bands are 8.0 and 15.5 MeV, and the latter is close to the He+Be threshold energy. It is also shown that the linear-chain state becomes the yrast sstate at J=10 with excitation energy 27.8 MeV owing to its very large moment-of-inertia comparable with hyperdeformation.

arXiv comment7 pages, 5 figures

References in corpus (12)

• Alpha cluster condensation in 12C and 16O
• Analysis of previous microscopic calculations for second $0^{+}$ state in ${}^{12}$C in terms of 3-alpha particle Bose-condensed state
• Variation after Angular Momentum Projection for the Study of Excited States Based on Antisymmetrized Molecular Dynamics
• Structure of Excited States of 10Be studied with Antisymmetrized Molecular Dynamics
• Deformed Base Antisymmetrized Molecular Dynamics and its Application to ^{20}Ne
• Molecular-orbital structure in neutron-rich C isotopes
• Anomalously hindered E2 strength B(E2;2_1^+ -> 0^+) in 16C
• Cluster structures of excited states in ${}^{14}$C
• Lifetime measurements of first excited states in 16,18C
• Deformation of C isotopes
• Cluster structures in Oxygen isotopes
• Be-$\alpha$ correlations in the linear-chain structure of C isotopes

Cited by in corpus (17)

• Microscopic Clustering in Light Nuclei
• Rod-shaped Nuclei at Extreme Spin and Isospin
• Antisymmetrized molecular dynamics studies for exotic clustering phenomena in neutron-rich nuclei
• Study of ground state properties of carbon isotopes with deformed relativistic Hartree-Bogoliubov theory in continuum
• Positive-parity linear-chain molecular band in ${}^{16}$C
• Stability of the linear chain structure for ${}^{12}$C in covariant density functional theory on a 3D lattice
• Structure and decay pattern of linear-chain state in 14C
• Dynamics of the linear-chain alpha cluster in microscopic time-dependent relativistic density functional theory
• Alpha-cluster structure in even-even nuclei around ${}^{94}$Mo
• Three-body decay of linear-chain states in ${}^{14}$C
• Real-time evolution method and its application to 3$\alpha$ cluster system
• Effects of rotation and valence nucleons in molecular-like $\alpha$-chain nuclei
• Characteristic αand ^{6}He decays of the linear-chains in ^{16}C
• Cluster structures and monopole transitions of ${}^{14}$C
• Shape of 13C studied by the real-time evolution method
• Monopole and dipole transitions of the cluster states of 18O
• Density-driven $\alpha$-particle clustering in neutron-rich oxygen isotopes