Cluster structures in ${}^{11}$B

Abstract

Structures of excited states in ${}^{11}$B are investigated with a method of $\beta$-$\gamma$ constraint antisymmetrized molecular dynamics in combination with the generator coordinate method. Various excited states with developed cluster core structures are suggested in positive- and negative-parity states. For negative-parity states, we suggest a band with a $2\alpha +t$ cluster structure. This band starts from the $3/2_3^{-}$ state and can correspond to the experimental band observed recently. In positive-parity states, two $\alpha$ core cluster structures with surrounding nucleons are found. A $K^{\pi }=1/2^{+}$ band is suggested to be constructed from a remarkably developed cluster structure with a large prolate deformation. We discuss features of the cluster structure in association with molecular orbital structures of ${}^{10}$Be.

13 pages, 9 figures. arXiv admin note: text overlap with arXiv:1004.4954

References in corpus (6)

• Cluster structures of excited states in ${}^{14}$C
• Negative parity states of ${}^{11}$B and ${}^{11}$C and the similarity with $^{12}C
• Quadrupole Deformation $\beta$ and $\gamma$ Constraint in a Framework of Antisymmetrized Molecular Dynamics
• $\alpha$-particle condensate states in ${}^{16}$O
• $\alpha +\alpha +t$ cluster structures and Hoyle-analogue states in ${}^{11}$B
• Be-$\alpha$ correlations in the linear-chain structure of C isotopes

Cited by in corpus (11)

• Microscopic Clustering in Light Nuclei
• Antisymmetrized molecular dynamics studies for exotic clustering phenomena in neutron-rich nuclei
• Alpha-resonance structure in ${}^{11}$C studied via resonant scattering of ${}^7$Be+$\alpha$ and ${}^7$Be($\alpha$, $p$) reaction
• Cluster states and monopole transitions in ${}^{16}$O
• Hoyle-analogue state in 13C studied with Antisymmetrized Molecular Dynamics
• Observation of ${}^6$He+$t$ cluster states in ${}^9$Li
• 2$\alpha$+$t$ cluster structure in ${}^{11}$B
• Systematic investigation of the Hoyle-analog states in light nuclei
• 2alpha+t cluster feature of $3/2_3^{-}$ state in ${}^{11}$B
• Persistence of cluster structure in the ground state of ${}^{11}$B
• Gamow shell model predictions for six-proton unbound nucleus ${}^{20}$Si