Observation of ${}^6$He+$t$ cluster states in ${}^9$Li

Abstract

${}^6$He+$t$ cluster states of exited ${}^9$Li have been measured by 32.7 MeV/nucleon ${}^9$Li beams bombarding on ${}^{208}$Pb target. Two resonant states are clearly observed with the excitation energies at 9.8 MeV and 12.6 MeV and spin-parity of 3/2${}^{-}$ and 7/2${}^{-}$ respectively. These two states are considered to be members of K${}^{\pi }$=1/2${}^{-}$ band. The spin-parity of them are identified by the method of angular correlation analysis and verified by the continuum discretized coupled channels (CDCC) calculation, which agrees with the prediction of the generator coordinate method (GCM). A monopole matrix element about 4 fm${}^2$ for the 3/2${}^{-}$ state is extracted from the distorted wave Born approximation (DWBA) calculation. These results strongly support the feature of clustering structure of two neutron-rich clusters in the neutron-rich nucleus ${}^9$Li for the first time.

References in corpus (16)

• Alpha cluster condensation in 12C and 16O
• Microscopic Clustering in Light Nuclei
• Large-basis shell-model calculations for p-shell nuclei
• A parameter-free optical potential for the heavy-ion elastic scattering proces
• Nonlocalized Clustering: A New Concept in Nuclear Cluster Structure Physics
• Giant Dipole Resonance as a Fingerprint of $\alpha$ Clustering Configurations in ${}^{12}$C and ${}^{16}$O
• $2\alpha +t$ cluster structure in ${}^{11}$B
• Status of Alpha-Particle Condensate Structure of the Hoyle State
• 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
• ${}^6$He + $\alpha$ clustering in ${}^{10}$Be
• Cluster structures in ${}^{11}$B
• ${}^6$He-triton cluster states in ${}^9$Li
• Monopole transitions to cluster states in ${}^{10}$Be and ${}^9$Li
• 2$\alpha$+$t$ cluster structure in ${}^{11}$B
• Three triton states in 9Li

Cited by in corpus (3)

• The study of the alpha formation probability in 10Be and 12Be within the microscopic cluster model
• Cluster configurations in Li isotopes in the variation of multi-bases of the antisymmetrized molecular dynamics
• Exploring the Diversity of Nuclear Density through Information Entropy