Clusterization and deformation of multi-
<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mi mathvariant="normal">Λ</mml:mi></mml:math>
 hypernuclei within a relativistic mean-field model

Tanimura, Yusuke

doi:10.1103/physrevc.99.034324

Cited by 15 publications

(11 citation statements)

References 72 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This observation is the same as that obtained by -0. the RMF model in Ref. [24]. However, for 4Λ and 6Λ hypernuclei, the opposite impurity effects can be seen, namely the deformations of the hypernuclei become larger than those of the core nuclei.…”

Section: Resultsmentioning

confidence: 94%

“…Of particular interest is the fact that the addition of Λ hyperons can lead to the appearance of the so-called impurity effect [2,7], since the hyperon(s) can enter deeply into the center of a hypernucleus regardless of the restriction of the Pauli exclusion principle, and thus can be used as a good probe to study the nuclear environment. The impurity effects of single-Λ hypernuclei have been investigated extensively in the past decades, such as the shrinkage effect [22][23][24], the modification of the drip lines [25,26], and the modification of the deformation [27][28][29][30][31][32][33].…”

Section: Introductionmentioning

confidence: 99%

“…Very recently, the impurity effects of multi Λ hyperons on the deformations in the hyperisotope chains 8+n nΛ Be (n = 2, 4), 20+n nΛ Ne (n = 2,4,8), and 28+n nΛ Si (n = 2,4,8) have been studied using the relativistic mean field (RMF) theory in Ref. [24]. It was pointed out that in the Ne hyperisotopes, the deformation is slightly reduced by the additional Λ hyperons, whereas it is significantly reduced or even disappears in the Si hyperisotopes.…”

Section: Introductionmentioning

confidence: 99%

“…The aforementioned work in Ref. [24] studied only a few nuclei and did not address the impurity effects caused by 6 Λ hyperons. Therefore, further studies on the impurity effect of n = 2, 4, 6, 8 Λ hyperons on the properties of even-even nuclei ranging from 8 Be to 40 Ca are carried out in this work.…”

Section: Introductionmentioning

confidence: 99%

“…In contrast to the RMF model adopted in Ref. [24], we will employ the deformed Skyrme-Hartree-Fock (SHF) approach [45][46][47], which is one of the widely used models for hypernuclei [26,43,48].…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Effects of $\bm\la$ hyperons on the deformations of even-even nuclei

Chen,

Zhou

et al. 2021

Preprint

View full text Add to dashboard Cite

The deformations of multi-Λ hypernuclei corresponding to even-even core nuclei ranging from 8 Be to 40 Ca with 2, 4, 6, and 8 hyperons are studied in the framework of the deformed Skyrme-Hartree-Fock approach. It is found that the deformations are reduced when adding 2 or 8 Λ hyperons, but enhanced when adding 4 or 6 Λ hyperons. These differences are attributed to the fact that Λ hyperons are filled gradually into the three deformed p orbits, of which the [110]1/2 − orbit is prolately deformed and the degenerate [101]1/2 − and [101]3/2 − orbits are oblately deformed.

show abstract

Section: Resultsmentioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Effects of $\bm\la$ hyperons on the deformations of even-even nuclei

Chen,

Zhou

et al. 2021

Preprint

View full text Add to dashboard Cite

show abstract

Toroidal states in 28Si with covariant density functional theory in 3D lattice space

et al. 2020

View full text Add to dashboard Cite

The toroidal states in 28 Si with spin extending to extremely high are investigated with the cranking covariant density functional theory on a 3D lattice. Thirteen toroidal states with spin I ranging from 0 to 56 are obtained, and their stabilities against particle emission are studied by analyzing the density distributions and potentials. The excitation energies of the toroidal states at I = 28, 36, and 44 reasonably reproduce the observed three resonances extracted from the seven-α de-excitation of 28 Si. The possible existence of α clustering in these toroidal states is discussed based on α-localization function.Most nuclei in their ground states are spherical or ellipsoidal [1]. Wheeler suggested that very heavy nuclei may have toroidal shapes due to the large Coulomb energies [2].Pioneering works along this idea have been done by Wong [3][4][5]. Based on the toroidal potential in radially displaced harmonic-oscillator model [3,4], it was found that although the toroidal states in liquid-drop model are unstable against sausage deformations, the nuclear shell effects may counterbalance with this instability [3,4]. Later on, Wong predicted that the toroidal states could be stabilized with a sufficiently high angular momentum by introducing an effective "rotation" about the symmetry axis to the toroidal states [5]. Recent investigation on shells in a toroidal nucleus in the intermediate-mass region with the toroidal potential can be found in Ref. [6].The microscopic and self-consistent nuclear energy density functional theories (DFTs) [7][8][9][10] have also been used to investigate the toroidal states in both superheavy [11][12][13][14] and light nuclei [15][16][17][18][19][20]. In particular, for the high-spin toroidal states, a toroidal state with an angular momentum of 60 along the symmetry axis in 40 Ca has been obtained with the cranking Skyrme DFT [16]. Similar high-spin toroidal states in other nuclei with 28 ≤ A ≤ 52 were also investigated in Refs. [17][18][19][20].The angular momenta of the high-spin toroidal states are not from the collective rotation about the symmetry axis, but are generated by nucleon alignments [16,17]. The alignments of nucleons violate the time-reversal symmetries and, thus, induce strong currents [16], which requires a proper treatment of the time-odd fields in the framework of DFTs. In addition, some toroidal states may contain single particles in unbound states [16,18,20]. It is therefore important to examine the stability of the toroidal states against the nucleon emission.To treat the time-odd fields and nucleon emission properly, a covariant DFT (CDFT) calculation in three-dimensional (3D) lattice space is preferred. Due to the Lorentz invariance, the CDFT provides a self-consistent treatment of the time-odd fields; the time-odd fields share the same coupling constants as the time-even ones [21]. Working in 3D lattice space makes it suitable to examine the nuclear stability against nucleon emission. Fortunately, the CDFT in 3D lattice space is available now [22][23][24] af...

show abstract