Triaxial shape evolution and shape coexistence in Radon isotopes within the covariant density functional theory

IF 2.5 4区物理与天体物理 Q2 PHYSICS, NUCLEAR

Nuclear Physics A Pub Date : 2025-02-28 DOI:10.1016/j.nuclphysa.2025.123059

H.M. Elsharkawy , M.M. Abdel Kader , A.M. Basha , A. Lotfy

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引用次数: 0

Abstract

The Covariant Density Functional Theory (CDFT) is utilized to systematically study the triaxial shape evolution of even-even radon isotopic chain (N=104-150) within the framework of the Relativistic Hartree-Bogoliubov (RHB) mean-field model. In the present work we make use of two distinct effective interactions: the Density-Dependent Meson-Exchange (DD-ME2) and the Density-Dependent Point-Coupling interaction with parameter set DD-PCX.

Neutron deficient side of the considered isotopic chain shows several shape coexistence states accompanied by little remarkable triaxial states appeared in that region. Various ground state properties, such as the binding energy per nucleon, the two-neutron separation energy, and the proton, neutron, and charge radii are also presented and compared with alternative theoretical approaches like the Deformed Relativistic Hartree–Bogoliubov theory in Continuum (DRHBc), the Finite-Range Droplet Model (FRDM), the Infinite Nuclear Matter Model (INMM) and the proxy-SU(3) model.

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在共变密度泛函理论下氡同位素的三轴形状演化和形状共存

利用协变密度泛函数理论（CDFT）在相对论Hartree-Bogoliubov （RHB）平均场模型框架下系统地研究了偶偶氡同位素链（N=104-150）的三轴形状演化。在本工作中，我们利用了两种不同的有效相互作用：密度依赖介子交换（DD-ME2）和密度依赖点耦合相互作用与参数集DD-PCX。所考虑的同位素链的缺中子侧显示出几种形状共存状态，并在该区域出现少量显著的三轴态。各种基态性质，如每核子的结合能、双中子分离能、质子、中子和电荷半径，也被提出，并与替代的理论方法，如连续介质中的变形相对论hartrei - bogoliubov理论（DRHBc）、有限范围液滴模型（FRDM）、无限核物质模型（INMM）和代理su(3)模型进行了比较。

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来源期刊

Nuclear Physics A 物理-物理：核物理

CiteScore

3.60

自引率

7.10%

发文量

113

审稿时长

61 days

期刊介绍： Nuclear Physics A focuses on the domain of nuclear and hadronic physics and includes the following subsections: Nuclear Structure and Dynamics; Intermediate and High Energy Heavy Ion Physics; Hadronic Physics; Electromagnetic and Weak Interactions; Nuclear Astrophysics. The emphasis is on original research papers. A number of carefully selected and reviewed conference proceedings are published as an integral part of the journal.