Dipole excitation of ${}^6$Li and ${}^9$Be studied with an extended quantum molecular dynamics model

Abstract

The $\alpha$ (${}^4$He) - clustering structure is a common phenomenon in light nuclei due to the decreasing contribution of mean field in few-body system. In this work we presented calculations of giant dipole resonance (GDR) excitations for two non $\alpha$-conjugate light nuclei, namely ${}^6$Li and ${}^9$Be, within a framework of an extended quantum molecular dynamics model. For ${}^6$Li, we investigated the GDR spectra from the two-body clustering structure with $\alpha$ + deuteron as well as the three-body structure with $\alpha$ + $n$ + $p$, and found that the major $\alpha$-clustering contribution on the GDR peak is located at around 31 MeV, while the resonance contributions between clusters, namely $\alpha$ and deuteron or ($n$ + $p$), are located on the lower energy side, which can be regarded as pygmy dipole resonance (PDR). For ${}^9$Be, a mixture configuration contribution for the Chain-like structure and Borromean-like structure of the $\alpha$ + n + $\alpha$ configuration can somehow explain its GDR results.

arXiv comment8 pages, 5 figures

References in corpus (34)

• The s Process: Nuclear Physics, Stellar Models, Observations
• Alpha cluster condensation in 12C and 16O
• Modelling the many-body dynamics of heavy ion collisions: Present status and future perspective
• Finite amplitude method for the RPA solution
• Linear response theory in the continuum for deformed nuclei: Green's function vs. time-dependent Hartree-Fock with the absorbing-boundary condition
• 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
• Extension of Quantum Molecular Dynamics and its Application to Heavy-Ion Collisions
• Structure of the mirror nuclei ${}^9$Be and ${}^9$B in a microscopic cluster model
• Nuclear dynamics and particle production near threshold energies in heavy-ion collisions
• Nuclear cluster structure effect on elliptic and triangular flows in heavy-ion collisions
• Signatures of $\alpha$ clustering in ${}^{16}$O by using a multiphase transport model
• Dipole oscillation modes in light $\alpha$-clustering nuclei
• The Dynamical Dipole Mode in Dissipative Heavy Ion Collisions
• Photonuclear reaction as a probe for $\alpha$-clustering nuclei in the quasi-deuteron region
• Pygmy and Giant Dipole Resonances by Coulomb Excitation using a Quantum Molecular Dynamics model
• Constraining the in-medium nucleon-nucleon cross section from the width of nuclear giant dipole resonance
• Isovector and isoscalar dipole excitations in ${}^9$Be and ${}^{10}$Be studied with antisymmetrized molecular dynamics
• Dynamical dipole $\gamma$ radiation in heavy-ion collisions on the basis of the quantum molecular dynamics model
• Astrophysical S factor of {${}^{12}$C($\alpha ,\gamma$)${}^{16}$O} Calculated with the Reduced R-matrix Theory
• Clustering structure effect on Hanbury-Brown-Twiss correlation in ${}^{12}$C + ${}^{197}$Au collisions at 200 GeV}
• Two-proton momentum correlation from photondisintegration of $\alpha$-clustering light nuclei in the quasi-deuteron region
• Anisotropy fluctuation and correlation in central $\alpha$-clustered ${}^{12}$C+${}^{197}$Au collisions
• Nuclear collective dynamics in the lattice Hamiltonian Vlasov method
• An efficient method for mapping the 12C+12C molecular resonances at low energies
• Photodisintegration cross section of ${}^9$Be up to 16 MeV in the $\alpha$ + $\alpha$ + n three-body model
• Iso-vector dipole resonance and shear viscosity in low energy heavy-ion collision
• Yield ratio of neutrons to protons in ${}^{12}C(d,n{)}^{13}$N and ${}^{12}C(d,p{)}^{13}$C from 0.6 MeV to 3 MeV
• Isoscalar giant monopole resonance in Sn isotopes using a quantum molecular dynamics model
• Network structure of thermonuclear reactions in nuclear landscape
• Emergence of nuclear clustering in electric-dipole excitations of ${}^6$Li
• Symmetry-energy dependence of the dynamical dipole mode in the Boltzmann-Uehling-Uhlenbeck model
• Reaction rate weighted multilayer nuclear reaction network
• Triple α Resonances in the Decay of Hot Nuclear Systems *

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