Tetrahedral symmetry in the ground state of 16O

Wang, Xiaobao; Dong, G. X.; Gao, Zao-Chun; Chen, Y.S.; Chun-lin, Shen

doi:10.1016/j.physletb.2019.02.001

Cited by 17 publications

(10 citation statements)

References 32 publications

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“…However, the calculations systematically underestimate the data especially on 2 and 3 production, while the channel with single is overestimated. Such a discrepancy can be attributed to neglecting virtual multiple-cluster states in initial 16 O [2].…”

Section: Production Of 4 Hementioning

confidence: 99%

“…It is planned to study 16 O- 16 O collisions in future runs at the LHC [1]. Due to -clusterisation of nucleons in 16 O an admixture of a tetrahedral state in the ground state of this nucleus is considered, see, in particular [2]. It was found much earlier [3] that -core bound state in 16 O impacts -transfer and knock-out nuclear reactions involving 16 O.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Secondary nuclei from $^{16}$O fragmentation at the LHC

Svetlichnyi¹,

Nepeivoda²,

Kozyrev³

et al. 2022

Proceedings of the European Physical Society Conference on High Energy Physics — PoS(EPS-HEP2021)

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Fragmentation of relativistic 16 O in nuclear emulsions and in future runs at the LHC was simulated with the Abrasion-Ablation Monte Carlo for Colliders (AAMCC) model. The calculated probabilities of production of specific elements as spectators in 16 O-Em collisions were found in general agreement with measurements. However, the calculated multiplicity distributions of 4 He fragments have demonstrated the underestimation of channels with single 4 He and, especially with two and three 4 He. Such a deficiency of multiple production of 4 He can be attributed to -clustering in initial 16 O. The cross sections of production of given numbers of spectator neutrons and nucleons as well as certain spectator nuclei were also calculated with AAMCC for 16 O-16 O collisions at the LHC.

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Section: Production Of 4 Hementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Secondary nuclei from $^{16}$O fragmentation at the LHC

Svetlichnyi¹,

Nepeivoda²,

Kozyrev³

et al. 2022

Proceedings of the European Physical Society Conference on High Energy Physics — PoS(EPS-HEP2021)

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“…As a consequence, projectionafter-variation (PAV) techniques are employed to restore the broken symmetries and calculate observables with good quantum numbers [33][34][35][36][37][38][39][40][41]. PAV calculations have been applied to study the octupole deformations in Ra isotopes based on shell model wave functions [42], in Ra isotopes [43] and 20 Ne [44] based on RHB wave functions, in Ba, Ra isotopes [45,46], Zr isotopes [47], 16 O [48], actinides, superheavies [49] and other nuclei [50] based on HFB wave functions. There are also theoretical investigations of octupole deformations based on the multi-dimensional collective Hamitonian [51,52] and the interacting boson model [53].…”

Section: Introductionmentioning

confidence: 99%

Static octupole deformations in $^{96}$Zr from angular momentum and parity projections

Rong¹,

Lü²

2022

Preprint

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The shapes of zirconium isotopes remain an unsettled question drawing many interests. Recent analysis based on the STAR measurement in relativistic heavy-ion collision experiments provide evidences of non-zero β 30 in the ground state of 96 Zr [1], however, conventional nuclear structure models do not favour these pear-like shapes. To resolve this issue, in this work we perform systematic projection-after-variation calculations for 96 Zr based on the multidimensionally constrained relativistic Hartree-Bogoliubov model. We consider all β λµ with even µ simultaneously and present selected potential energy surfaces (PES's) and projected PES's with certain angular momentum and parity combinations. While the mean-field calculations always predict reflection-symmetric ground states, static octupole deformations emerge after projecting to the 0 + state. We find that β 20 , β 22 , β 30 and β 32 are all necessary for describing the ground state and their values vary significantly for excited states with different angular momenta and parities. These complex structures originate from the competition among various shell structures in this mass region. Our results suggest that both beyond-mean-field effects and exotic shapes are essential elements for understanding the structure of 96 Zr.

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“…[51,52], which properly takes into account the orthonormalization and antisymmetrization for the clustering channel. 16 O+ 12 C SCATTERING WITH ALPHA TRANSFER Given the significant α spectroscopic factors of the α + 12 C configurations of the 16 O nucleus discussed above and strong coupling effect of the α-cluster states shown by the structure calculations [57][58][59][60], some contributions of the α transfer channels to the elastic 16 O+ 12 C cross section are naturally expected at backward angles. A realistic description of the purely elastic scattering is very important for the present CRC study of the α transfer in the 16 O+ 12 C scattering.…”

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confidence: 99%

Elastic and Inelastic Alpha Transfer in the $^{16}$O+$^{12}$C Scattering

Phuc

Khoa

2021

Comm. in Phys.

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The elastic scattering cross section measured at energies $E\lesssim 10$ MeV/nucleon for some light heavy-ion systems having two identical cores like $^{16}$O+$^{12}$C exhibits an enhanced oscillatory pattern at the backward angles. Such a pattern is known to be due to the transfer of the valence nucleon or cluster between the two identical cores. In particular, the elastic $\alpha$ transfer has been shown to originate directly from the core-exchange symmetry in the elastic $^{16}$O+$^{12}$C scattering. Given the strong transition strength of the $2^+_1$ state of $^{12}$C and its large overlap with the $^{16}$O ground state, it is natural to expect a similar $\alpha$ transfer process (or inelastic $\alpha$ transfer) to take place in the inelastic $^{16}$O+$^{12}$C scattering. The present work provides a realistic coupled channel description of the $\alpha$ transfer in the inelastic $^{16}$O+$^{12}$C scattering at low energies. Based on the results of the 4 coupled reaction-channels calculation, we show a significant contribution of the $\alpha$ transfer to the inelastic $^{16}$O+$^{12}$C scattering cross section at the backward angles. These results suggest that the explicit coupling to the $\alpha$ transfer channels is crucial in the studies of the elastic and inelastic scattering of a nucleus-nucleus system with the core-exchange symmetry.

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Tetrahedral symmetry in the ground state of 16O

Cited by 17 publications

References 32 publications

Secondary nuclei from $^{16}$O fragmentation at the LHC

Secondary nuclei from $^{16}$O fragmentation at the LHC

Static octupole deformations in $^{96}$Zr from angular momentum and parity projections

Elastic and Inelastic Alpha Transfer in the \(^{16}\)O+\(^{12}\)C Scattering

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