10.57647/j.jtap.2025.1906.56

Study of the Electric Quadruple Moment of One-‎proton Halo Nucleus 8B by Using the Two-body ‎Model, the Collective Model and the Microscopic ‎Single-particle Shell Model

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  • Md. Mahbub Alam Mamun‎1,
  • Md. Sagor Mia‎1,
  • Tazul Islam*1,
  1. Department of Physics, Mawlana Bhashani Science and Technology University, Santosh, Tangail, 1902, Bangladesh

Received: 2025-08-14

Revised: 2025-09-09

Accepted: 2025-10-17

Published in Issue 2025-12-31

Copyright (c) 2025 Md. Mahbub Alam Mamun‎, Md. Sagor Mia‎, Tazul Islam (Author)

Creative Commons License

This work is licensed under a Creative Commons Attribution 4.0 International License.

How to Cite

1.
Mamun‎ MMA, Mia‎ MS, Islam T. Study of the Electric Quadruple Moment of One-‎proton Halo Nucleus 8B by Using the Two-body ‎Model, the Collective Model and the Microscopic ‎Single-particle Shell Model. J Theor Appl phys. 2025 Dec. 31;19(6). Available from: https://oiccpress.com/jtap/article/view/17996
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Abstract

The nuclear electric quadruple moment of the proton-rich weakly bound Boron-8 (⁸B) halo nucleus is investigated using three theoretical approaches: the microscopic single-particle shell model, the collective model, and the two-body model. These approaches provide a reasonable prediction of the quadruple deformation that occurred due to the core polarization and many-body effects. These approaches also provide how the extended proton distribution influences the quadruple moment. The experimental value of electric quadruple moment (Q) of 8B is 6.45 efm². While the calculated value using the two-body model is 6.86 efm² and the collective model gives 5.83 efm² and the microscopic single particle shell model gives 4.03 efm². The ⁸B nucleus is a one-proton halo structure with a loosely bound valence proton outside a ⁷Be core, and it is an excellent candidate for studying nuclear deformation and quadruple effects near the proton drip-line. By comparing the predictions of these models with available experimental data, it can be measured their effectiveness in describing ⁸B’s structure. These predictions reveal the structure of the halo configuration that influences the quadruple properties of exotic nuclei.

Keywords

  • Nuclear electric quadruple moment,
  • Proton-rich,
  • Weakly bound,
  • Microscopic single-particle shell model,
  • Collective model,
  • Two-body model,
  • Proton drip-line
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