Backbending phenomena in light nuclei at A∼60

El‐Kameesy, S. U.; Alharbi, H. H.; Alhendi, H. A.

doi:10.1063/1.2200978

Cited by 4 publications

(2 citation statements)

References 18 publications

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“…In Eq. (2), I is derived from the first discrete derivative of E(J) with respect to J(J + 1), whereas ω is derived from the rotational energy at mid-point E(J)+E(J−2) 2 ∼ 1 2 I 2 ( ω) 2 (e.g., see [24]).…”

Section: Theoretical Framework a Backbending And The Rigid Rotor Modelmentioning

confidence: 99%

New Insights into Backbending in the Symmetry-adapted Framework

D.¹,

Sargsyan²,

Launey³

et al. 2022

Preprint

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We provide new insights into backbending phenomenon within the symmetry-adapted framework which naturally describes the intrinsic deformation of atomic nuclei. For 20 Ne, the canonical example of backbending in light nuclei, the ab initio symmetry-adapted no-core shell model shows that while the energy spectrum replicates the backbending from experimental energies under the rigid rotor assumption, there is no change in the intrinsic deformation or intrinsic spin of the yrast band around the backbend. For the traditional example of 48 Cr, computed in the valence shell with empirical interactions, we confirm a high-spin nucleus that is effectively spherical, in agreement with previous models. However, we find that this spherical distribution results, on average, from an almost equal mixing of deformed prolate shapes with deformed oblate and triaxial shapes. Microscopic calculations confirm the importance of spin alignment and configuration mixing, but surprisingly unveil no anomalous increase in moment of inertia. This finding opens the path toward further understanding the rotational behavior and moment of inertia of medium-mass nuclei.

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Section: Theoretical Framework a Backbending And The Rigid Rotor Modelmentioning

confidence: 99%

New Insights into Backbending in the Symmetry-adapted Framework

D.¹,

Sargsyan²,

Launey³

et al. 2022

Preprint

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show abstract

“…These works led us to use a suitable Ic values to represent both the variation of the moment of inertia and the pairing correlation and to give the model the ability to describe well the φ-ω 2 plot region, in particular the forward and down-bending regions. The modified version of the exponential model with pairing attenuation has the following form [7] [28]:…”

Section: The Improved Exponential Model Descriptionmentioning

confidence: 99%

Comparative Phenomenological Description of Even-Even Isotopes at Mass Region A ≈ 70

El‐Kameesy¹,

Shahbunder²,

Abdelmageed³

et al. 2016

JAMP

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In the present work the nuclear structure properties and the backbending phenomena of eveneven isotopes at A ≈ 70 mass region are analyzed using two simultaneous theoretical models based on a simple modified version of the collective model predictions besides an improved version of exponential model with the inclusion of pairing correlation. In general, both models successfully describe the backbending phenomena in that region. From the comparison between the predictions of the two proposed models a firm conclusion is obtained concerning the superiority of the simple improved version of the exponential model in describing the forward and downbending region of the φ-ω 2 plots.

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New insights into backbending in the symmetry-adapted shell-model framework

Sargsyan

Launey

et al. 2023

Phys. Rev. C

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Backbending phenomena in light nuclei at A∼60

Cited by 4 publications

References 18 publications

New Insights into Backbending in the Symmetry-adapted Framework

New Insights into Backbending in the Symmetry-adapted Framework

Comparative Phenomenological Description of Even-Even Isotopes at Mass Region A ≈ 70

New insights into backbending in the symmetry-adapted shell-model framework

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