Cluster and toroidal aspects of isoscalar dipole excitations in 
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Kanada-En’yo, Yoshiko; Shikata, Yuki; Morita, Horiyuki

doi:10.1103/physrevc.97.014303

Cited by 17 publications

(28 citation statements)

References 39 publications

(67 reference statements)

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“…The trend of the energy shift down or up in 7 Λ Li, 11 Λ B, 12 Λ C, and 15 Λ N is consistent with the results in Ref. [23].…”

Section: E Energy Shifts By the Addition Of A λ Particlesupporting

confidence: 91%

“…For example, the ΛN spin-orbit interaction depending on the nuclear spin plays an essential role for energy shifts in hypernuclei. Recently, it is also discussed that the difference of nuclear radii in core states affects the energy shifts of the corresponding states in the hypernuclei [23]. It should be noted that both of these effects are included in our results.…”

Section: E Energy Shifts By the Addition Of A λ Particlementioning

confidence: 67%

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Low-lying level structure of Λ hypernuclei and spin dependence of the ΛN interaction with antisymmetrized molecular dynamics

2020

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ΛN spin-spin and spin-orbit splittings in low-lying excitation spectra are investigated for p-shell Λ hypernuclei on the basis of the microscopic structure calculation within the antisymmetrized molecular dynamics, where the ΛN G-matrix interaction derived from the baryon-baryon interaction model ESC (extended soft core) is used. It is found that the ground-state spin-parity is systematically reproduced in the p-shell Λ hypernuclei by tuning the ΛN spin-spin and spin-orbit interactions so as to reproduce the experimental data of 4 Λ H, 7 Λ Li and 9 Λ Be. Furthermore, we also focus on the excitation energies of the excited doublets as well as the energy shifts of them by the addition of a Λ particle.

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“…The trend of the energy shift down or up in 7 Λ Li, 11 Λ B, 12 Λ C, and 15 Λ N is consistent with the results in Ref. [23].…”

Section: E Energy Shifts By the Addition Of A λ Particlesupporting

confidence: 91%

Section: E Energy Shifts By the Addition Of A λ Particlementioning

confidence: 67%

Low-lying level structure of Λ hypernuclei and spin dependence of the ΛN interaction with antisymmetrized molecular dynamics

2020

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“…In the analysis of isoscalor dipole excitations, the CD and TD operators are used as done in Refs. [43,46]. The former (CD) corresponds to the standard IS1 operator and sensitive to the compressive dipole excitations, and the latter (TD) has been proved to be as a good measure of the nuclear vorticity in the dipole excitations as discussed in Ref.…”

Section: Appendix A: Transition Densitiesmentioning

confidence: 94%

Isoscalar dipole excitations in O16

Kanada-En’yo

Shikata

2019

Phys. Rev. C

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Isoscalar (IS) monopole and dipole excitations in 16 O were investigated by the method of shifted basis antisymmetrized molecular dynamics combined with the generator coordinate method. Significant strengths of the IS monopole and dipole transitions were obtained in the low-energy region below the giant resonances. In addition to the compressive mode, which mainly contributes to the high-energy strengths for the IS dipole giant resonance, we obtained a variety of low-energy dipole modes such as the vortical dipole mode in the 1 − 1 state of the vibrating tetrahedral 4α and the 12 C+α cluster structure in the 1 − 2 state. The 1 − 1 state contributes to the significant low-energy strength of the IS dipole transition as 5% of the energy-weighted sum rule, which describes well the experimental data observed by the α inelastic scattering.

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“…Recently, theoretical studies of the toroidal mode have been extended to deformed nuclei, in which further rich phenomena are expected because of coupling of the LED mode with the nuclear deformation [33,34,35,36,37]. In our recent works with the antisymmetrized molecular dynamics (AMD), we have studied the LED in light nuclei such as 10 Be [38] and 12 C [39], and predicted the toroidal dipole excitations. We have also shown that the cluster structure plays an important role in the LED of light nuclei.…”

Section: Introductionmentioning

confidence: 99%

Low-energy dipole excitation modes in $^{10}$Be

Shikata

Kanada-En’yo

Morita

2019

Progress of Theoretical and Experimental Physics

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Low-energy dipole excitations in 10 Be were investigated based on the generator coordinate method with α + 6 He and α + α + 2n cluster models. We obtained three 1 − states in E x < 15 MeV, which show different characters in the E1, compressive dipole, and toroidal dipole transition strengths. We found the strong toroidal dipole transition in the 1 − 1 state, remarkable E1 strength in the 1 − 2 state, and the strong E1 and compressive dipole strength in the 1 − 3 state. The 1 − 1 is described by the α + 6 He cluster structure, where as the 1 − 2 and 1 − 3 states are understood by three-body excitations of the α + α + 2n clustering.

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Cluster and toroidal aspects of isoscalar dipole excitations in C12

Cited by 17 publications

References 39 publications

Low-lying level structure of Λ hypernuclei and spin dependence of the ΛN interaction with antisymmetrized molecular dynamics

Low-lying level structure of Λ hypernuclei and spin dependence of the ΛN interaction with antisymmetrized molecular dynamics

Isoscalar dipole excitations in O16

Low-energy dipole excitation modes in $^{10}$Be

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