Prediction of halo structure in nuclei heavier than 
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 with the complex momentum representation method

Cao, Xue-Neng; Liu, Q.; Guo, Jian-You

doi:10.1103/physrevc.99.014309

Cited by 14 publications

(4 citation statements)

References 63 publications

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“…Furthermore, this approach has been validated to be an effective method for studying the resonant state of single particles [34][35][36]. The CMR method is not only suitable for spherical nuclei [37,38] but also for deformed nuclei [39][40][41]. In addition, its application is successful in the RMF-CMR+BCS to describe the ground state properties and elucidate a few exotic phenomena of the neutron-rich nuclei [37,42].…”

Section: Momentioning

confidence: 99%

Exploring the halo phenomena of medium-mass nuclei having approximately Z= 40 with point-coupled parameters in complex momentum representations *

Chu¹,

Heng²

2021

Chinese Phys. C

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To explore the properties of neutron-rich nuclei with approximately 40 protons, the density-dependent point coupling (DD-PC1) effective interaction parameter is adopted in the relativistic mean-field theory with the complex momentum representation (RMF-CMR). The calculated two-neutron separation energy (S 2n ) and root-mean-square (rms) radii support the halo structure that appear in Mo and Ru isotopic chains. Besides, the neutron skin structures appear in Kr and Sr isotopes. The conclusions drawn are also supported by the single-particle energy levels and their occupancy probability and density distribution. Particularly, the energy levels, which reduce to bound states or are approximately 0 MeV with a small orbital angular momentum, are suggested to provide the primary contribution to increasing the neutron radius. Moreover, the single-particle energy levels significantly reflect the shell structure. In addition, the neutron drip line nuclei for Kr, Sr, Mo, and Ru elements are proposed via the changes in S 2n .

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Section: Momentioning

confidence: 99%

Exploring the halo phenomena of medium-mass nuclei having approximately Z= 40 with point-coupled parameters in complex momentum representations *

Chu¹,

Heng²

2021

Chinese Phys. C

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“…In combination with the relativistic mean field (RMF) theory, we have established the RMF-CMR in the relativistic meson exchange model [40] and the relativistic point-coupling model [41], and presented satisfactory descriptions for spherical exotic nuclei [42,43]. Further, we have extended this method to deformed systems [44,45], and presented reasonable explanations for the mechanism of deformation halos in 31 Ne [45], 37 Mg [46], 34 Na [47], and predicted possible existence of halo in the extremely neutron-rich nucleus 75 Cr [48].…”

Section: Introductionmentioning

confidence: 96%

Research on the deformed halo in ²⁹F with a complex momentum representation method

Zhai¹,

Cao²,

Guo³

2022

J. Phys. G: Nucl. Part. Phys.

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The weakly bound nucleus $^{29}$F locates near the neutron drip line. Experiments have confirmed that it is the heaviest two-neutron halo nucleus up to now. To understand the halo structure in $^{29}$F, we explore the weakly bound and resonant levels close to the Fermi surface with the complex momentum representation method. Not only the narrow resonances, but also the broad resonances are obtained. Since the broad resonance $2p_{3/2}$ is disclosed, the $\emph{p-f}$ inversion and $N=20$ shell gap quenching are found. The last valence neutron can occupy the weakly bound level 1/2[310] composed mainly of $p_{3/2}-$component, or the 1/2[211] composed mainly of $% s_{1/2}-$component. Since the wavefunctions of $p$ and $s-$components extend to a large range in the coordinate space, which results in the density distributions of the levels 1/2[310] and 1/2[211] are considerably diffuse. This is the most likely cause of halo formation in $^{29}$F and the halo may be formed by the $p-$component, $s-$component, or their mixtures by pairing correlations.

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“…Since early studies of these systems [1], this field, once dominated by light weakly-bound halo systems as exemplified by several recent studies (Refs. ) on the breakup dynamics of these systems, has witnessed increasing identification of weakly-bound heavy neutron-halo systems, such as and [35][36][37][38][39][40][41][42][43][44][45], located on the neutron-rich limit of the nuclear chart. Owing to the effect of the centrifugal barrier, halo features are manifest in low ( ) orbital angular momenta [46].…”

Section: Introductionmentioning

confidence: 99%

Role of a high ground-state centrifugal barrier in the breakup of the ³¹Ne nucleus

Mukeru¹

2023

Chinese Phys. C

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An analysis of the breakup of the 31Ne weakly-bound neutron-halo system on a lead target is presented, considering 2p3/2 and 1f7/2 ground-state configurations. It is shown that a high centrifugal barrier almost wipes out the breakup channel, thus assimilating the breakup of a weakly-bound system to that of a tightly-bound system, and also reduces the range of the monopole nuclear potential. Consequently, a high centrifugal barrier prevents the suppression of the Coulomb-nuclear interference (CNI) peak by weakening the breakup channel, and by reducing the range of the monopole nuclear potential, two main factors that would otherwise suppress that peak. In conclusion, the present study also identifies couplings to the breakup channel and a long-ranged monopole nuclear potential as the main factors that lead to the suppression of the CNI peak. A low centrifugal barrier together with a Coulomb barrier would as well effectively prevent the suppression of the CNI peak in proton-halos, as it has been reported the case of the 8B proton-halo.

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Prediction of halo structure in nuclei heavier than Mg37 with the complex momentum representation method

Cited by 14 publications

References 63 publications

Exploring the halo phenomena of medium-mass nuclei having approximately Z= 40 with point-coupled parameters in complex momentum representations *

Exploring the halo phenomena of medium-mass nuclei having approximately Z= 40 with point-coupled parameters in complex momentum representations *

Research on the deformed halo in ²⁹F with a complex momentum representation method

Role of a high ground-state centrifugal barrier in the breakup of the ³¹Ne nucleus

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Prediction of halo structure in nuclei heavier than Mg37 with the complex momentum representation method

Cited by 14 publications

References 63 publications

Exploring the halo phenomena of medium-mass nuclei having approximately Z= 40 with point-coupled parameters in complex momentum representations *

Exploring the halo phenomena of medium-mass nuclei having approximately Z= 40 with point-coupled parameters in complex momentum representations *

Research on the deformed halo in 29F with a complex momentum representation method

Role of a high ground-state centrifugal barrier in the breakup of the 31Ne nucleus

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Research on the deformed halo in ²⁹F with a complex momentum representation method

Role of a high ground-state centrifugal barrier in the breakup of the ³¹Ne nucleus