Skyrme–Hartree–Fock–Bogoliubov mass models on a 3D mesh: IV. Improved description of the isospin dependence of pairing

IF 2.6 3区 物理与天体物理 Q2 PHYSICS, NUCLEAR
Guilherme Grams, Nikolai N. Shchechilin, Adrián Sánchez-Fernández, Wouter Ryssens, Nicolas Chamel, Stephane Goriely
{"title":"Skyrme–Hartree–Fock–Bogoliubov mass models on a 3D mesh: IV. Improved description of the isospin dependence of pairing","authors":"Guilherme Grams,&nbsp;Nikolai N. Shchechilin,&nbsp;Adrián Sánchez-Fernández,&nbsp;Wouter Ryssens,&nbsp;Nicolas Chamel,&nbsp;Stephane Goriely","doi":"10.1140/epja/s10050-025-01503-x","DOIUrl":null,"url":null,"abstract":"<div><p>Providing reliable data on the properties of atomic nuclei and infinite nuclear matter to astrophysical applications remains extremely challenging, especially when treating both properties coherently within the same framework. Methods based on energy density functionals (EDFs) enable manageable calculations of nuclear structure throughout the entire nuclear chart and of the properties of infinite nuclear matter across a wide range of densities and asymmetries. To address these challenges, we present BSkG4, the latest Brussels-Skyrme-on-a-Grid model. It is based on an EDF of the extended Skyrme type with terms that are both momentum and density-dependent, and refines the treatment of <span>\\(^1S_0\\)</span> nucleon pairing gaps in asymmetric nuclear matter as inspired by more advanced many-body calculations. The newest model maintains the accuracy of earlier BSkGs for known atomic masses, radii and fission barriers with rms deviations of 0.633 MeV w.r.t. 2457 atomic masses, 0.0246 fm w.r.t. 810 charge radii, and 0.36 MeV w.r.t 45 primary fission barriers of actinides. It also improves some specific pairing-related properties, such as the <span>\\(^1S_0\\)</span> pairing gaps in asymmetric nuclear matter, neutron separation energies, <span>\\(Q_\\beta \\)</span> values, and moments of inertia of finite nuclei. This improvement is particularly relevant for describing the <i>r</i>-process nucleosynthesis as well as various astrophysical phenomena related to the rotational evolution of neutron stars, their oscillations, and their cooling.</p></div>","PeriodicalId":786,"journal":{"name":"The European Physical Journal A","volume":"61 2","pages":""},"PeriodicalIF":2.6000,"publicationDate":"2025-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"The European Physical Journal A","FirstCategoryId":"4","ListUrlMain":"https://link.springer.com/article/10.1140/epja/s10050-025-01503-x","RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"PHYSICS, NUCLEAR","Score":null,"Total":0}
引用次数: 0

Abstract

Providing reliable data on the properties of atomic nuclei and infinite nuclear matter to astrophysical applications remains extremely challenging, especially when treating both properties coherently within the same framework. Methods based on energy density functionals (EDFs) enable manageable calculations of nuclear structure throughout the entire nuclear chart and of the properties of infinite nuclear matter across a wide range of densities and asymmetries. To address these challenges, we present BSkG4, the latest Brussels-Skyrme-on-a-Grid model. It is based on an EDF of the extended Skyrme type with terms that are both momentum and density-dependent, and refines the treatment of \(^1S_0\) nucleon pairing gaps in asymmetric nuclear matter as inspired by more advanced many-body calculations. The newest model maintains the accuracy of earlier BSkGs for known atomic masses, radii and fission barriers with rms deviations of 0.633 MeV w.r.t. 2457 atomic masses, 0.0246 fm w.r.t. 810 charge radii, and 0.36 MeV w.r.t 45 primary fission barriers of actinides. It also improves some specific pairing-related properties, such as the \(^1S_0\) pairing gaps in asymmetric nuclear matter, neutron separation energies, \(Q_\beta \) values, and moments of inertia of finite nuclei. This improvement is particularly relevant for describing the r-process nucleosynthesis as well as various astrophysical phenomena related to the rotational evolution of neutron stars, their oscillations, and their cooling.

三维网格上的Skyrme-Hartree-Fock-Bogoliubov质量模型:IV.对同位旋依赖性的改进描述
为天体物理应用提供关于原子核和无限核物质性质的可靠数据仍然极具挑战性,特别是在同一框架内连贯地处理这两种性质时。基于能量密度泛函(edf)的方法能够在整个核图中对核结构进行易于管理的计算,并在广泛的密度和不对称范围内对无限核物质的性质进行计算。为了应对这些挑战,我们提出了BSkG4,最新的brussel - skyrme -on- grid模型。它基于扩展的Skyrme类型的EDF,其术语既依赖于动量也依赖于密度,并且根据更先进的多体计算的启发,改进了不对称核物质中\(^1S_0\)核子对间隙的处理。最新模型保持了早期bskg对已知原子质量、半径和裂变势垒的准确性,均方根偏差为0.633 MeV w.r.t. 2457原子质量,0.0246 MeV w.r.t. 810电荷半径,0.36 MeV w.r.t. 45锕系元素的主要裂变势垒。它还改善了一些特定的与配对有关的性质,如不对称核物质中的\(^1S_0\)配对间隙、中子分离能、\(Q_\beta \)值和有限核的惯性矩。这一改进对于描述r过程核合成以及与中子星旋转演化、振荡和冷却有关的各种天体物理现象尤其重要。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
求助全文
约1分钟内获得全文 求助全文
来源期刊
The European Physical Journal A
The European Physical Journal A 物理-物理:核物理
CiteScore
5.00
自引率
18.50%
发文量
216
审稿时长
3-8 weeks
期刊介绍: Hadron Physics Hadron Structure Hadron Spectroscopy Hadronic and Electroweak Interactions of Hadrons Nonperturbative Approaches to QCD Phenomenological Approaches to Hadron Physics Nuclear and Quark Matter Heavy-Ion Collisions Phase Diagram of the Strong Interaction Hard Probes Quark-Gluon Plasma and Hadronic Matter Relativistic Transport and Hydrodynamics Compact Stars Nuclear Physics Nuclear Structure and Reactions Few-Body Systems Radioactive Beams Electroweak Interactions Nuclear Astrophysics Article Categories Letters (Open Access) Regular Articles New Tools and Techniques Reviews.
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
copy
已复制链接
快去分享给好友吧!
我知道了
右上角分享
点击右上角分享
0
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术官方微信