Neutron shell closure at N = 32 and N = 40 in Ar and Ca isotopes

Adri, M. El; Oulne, M.

doi:10.1140/epjp/s13360-020-00277-z

Cited by 13 publications

(5 citation statements)

References 53 publications

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“…3 (a) a large peak is observed for 52 Ca and comparatively smaller peaks are observed for 46 Si and 60 Ni leading to the magic character in accordance with the Refs. [1,2,26]. A similar kind of pattern is found in Fig.…”

Section: Resultssupporting

confidence: 81%

Magicity in the nuclei with N = 32 & 34

Sharma

Jain

et al. 2021

Hyperfine Interact

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Inspired by the recent experimental evidences for double magicity in 52,54 Ca, we have employed relativistic mean-field (RMF) approach with density-dependent meson-nucleon couplings using DD-ME2 parameter for a systematic study of nuclei with neutron numbers N=32 and 34 with the help of ground state properties of even-even nuclei. Our extensive calculations include deformation, binding energies, 2p-separation energies, radii, etc. We compare our results with the available experimental data and another parameter of RMF. Our results of potential energy surface, two proton shell gap, isotopic shift, and normalized radius demonstrate signature of double magicity in N=32 and 34 isotones, in particular for 46,48 Si, 60,62 Ni along with what found for 52,54 Ca.

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Section: Resultssupporting

confidence: 81%

Magicity in the nuclei with N = 32 & 34

Sharma

Jain

et al. 2021

Hyperfine Interact

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“…[14] have studied the formation of new shell gaps in intermediate mass neutron-rich nuclei within the relativistic Hartree-Fock-Bogoliubov (RHFB) theory, in which they successfully reproduced the wellknown shell gaps and suggested the occurrence of new ones. In our recent work [15], we have confirmed the emergence of new magic numbers at N=32 and N=40 in Ca (Z=20) and Ar (Z=18) nuclei within the relativistic Hartree-Bogoliubov (RHB) and non-relativistic Hartree-Fock-Bogoliubov (HFB) approaches. The classic magic numbers in those nuclei are also well reproduced.…”

Section: Introductionmentioning

confidence: 59%

Shell Evolution in Neutron-rich Ge, Se, Kr and Sr Nuclei within RHB Approach

Adri,

Oulne

2020

Preprint

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The exotic even-even isotopic chains from Z=32 to Z=38 are investigated by means of the relativistic Hartree-Bogoliubov (RHB) approach with the explicit Density Dependent Meson-Exchange (DD-ME2) and Density Dependent Point-Coupling (DD-PC1) models. The classic magic number N=50 is reproduced and the new number N=70 is predicted to be a robust shell closure by analysing several calculated quantities such as: two-neutron separation energies, two-neutron shell gap, neutron pairing energy, potential energy surface and neutron single particle energies with and without the tensor force. The obtained results are corroborated by shell model calculations and compared with the predictions of finite range droplet model (FRDM) and with the available experimental data. A reasonable and satisfactory agreement between the theoretical models and experiment is established.

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“…It was pointed out in Ref. [49] that in the case of Argon isotopes N = 20 was not found to be a magic number. Most likely this is due to the inversion of the standard sd-shell configuration and the intruder fp-shell, as it has been proved for the neutron-rich 32 Mg nucleus, which lies in the much explored island of inversion at N = 20 (see, for instance, Ref.…”

Section: Predictions For Nuclear Skins Results Of the Relation Between The Neutron Skin Of A Nucleus And The Difference Between The Protomentioning

confidence: 97%

Proton and neutron skins and symmetry energy of mirror nuclei

et al. 2020

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The neutron skin of nuclei is an important fundamental property, but its accurate measurement faces many challenges. Inspired by charge symmetry of nuclear forces, the neutron skin of a neutron-rich nucleus is related to the difference between the charge radii of the corresponding mirror nuclei. We investigate this relation within the framework of the Hartree-Fock-Bogoliubov method with Skyrme interactions. Predictions for proton skins are also made for several mirror pairs in the middle mass range. For the first time the correlation between the thickness of the neutron skin and the characteristics related with the density dependence of the nuclear symmetry energy is investigated simultaneously for nuclei and their corresponding mirror partners. As an example, the Ni isotopic chain with mass number A = 48 − 60 is considered. These quantities are calculated within the coherent density fluctuation model using Brueckner and Skyrme energy-density functionals for isospin asymmetric nuclear matter with two Skyrme-type effective interactions, SkM* and SLy4. Results are also presented for the symmetry energy as a function of A for a family of mirror pairs from selected chains of nuclei with Z = 20, N = 14, and N = 50. The evolution curves show a similar behavior crossing at the N = Z nucleus in each chain and a smooth growing deviation when N = Z starts. Comparison of our results for the radii and skins with those from the calculations based on high-precision chiral forces is made.

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Neutron shell closure at N = 32 and N = 40 in Ar and Ca isotopes

Cited by 13 publications

References 53 publications

Magicity in the nuclei with N = 32 & 34

Magicity in the nuclei with N = 32 & 34

Shell Evolution in Neutron-rich Ge, Se, Kr and Sr Nuclei within RHB Approach

Proton and neutron skins and symmetry energy of mirror nuclei

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