The European Physical Journal A最新文献_第6页

Progress in the study of electric giant resonances over the last five decades 近五十年来电巨共振研究的进展

IF 2.8 3区物理与天体物理

The European Physical Journal A Pub Date : 2025-08-12 DOI: 10.1140/epja/s10050-025-01660-z

Muhsin N. Harakeh

{"title":"Progress in the study of electric giant resonances over the last five decades","authors":"Muhsin N. Harakeh","doi":"10.1140/epja/s10050-025-01660-z","DOIUrl":"10.1140/epja/s10050-025-01660-z","url":null,"abstract":"<div>A rich spectrum of giant resonances of different multipolarities and spin and isospin structure was expected on theoretical grounds. In the nineteen seventies, the isoscalar giant quadrupole resonance (ISGQR) was discovered in electron scattering followed by the isoscalar giant monopole resonance (ISGMR) in inelastic α scattering. In the last 5 decades, the compression modes the ISGMR and isoscalar giant dipole resonance (ISGDR) were extensively studied because of their importance for the determination of the nuclear-matter incompressibility and consequently their implications for the equation of state (EOS) of nuclear matter. Though the nuclear matter incompressibility (K∞) has been reasonably well determined (~ 240 ± 20 MeV) through comparison of experimental results on several spherical nuclei with microscopic calculations, the asymmetry term was determined with larger uncertainty. This has been addressed in measurements on a series of stable Sn and Cd isotopes, which resulted in a value of Kτ = − 550 ± 100 MeV for the asymmetry term in the nuclear incompressibility. The nuclear matter incompressibility and the asymmetry term are key parameters of the equation of state (EOS) of nuclear matter.</div>","PeriodicalId":786,"journal":{"name":"The European Physical Journal A","volume":"61 8","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epja/s10050-025-01660-z.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144832069","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Energy dependence of isomeric ratios for alpha-particle-induced reactions on natural platinum up to 50 MeV studied by simultaneous decay curve analysis 用同步衰减曲线分析研究了α粒子诱导天然铂在50 MeV以上的反应中同分异构体比例的能量依赖性

IF 2.8 3区物理与天体物理

The European Physical Journal A Pub Date : 2025-08-09 DOI: 10.1140/epja/s10050-025-01643-0

Naohiko Otuka, Masayuki Aikawa, Sándor Takács, Damdinsuren Gantumur, Shuichiro Ebata, Lkhagvasuren Bold, Akihiro Nambu, Hiromitsu Haba

{"title":"Energy dependence of isomeric ratios for alpha-particle-induced reactions on natural platinum up to 50 MeV studied by simultaneous decay curve analysis","authors":"Naohiko Otuka, Masayuki Aikawa, Sándor Takács, Damdinsuren Gantumur, Shuichiro Ebata, Lkhagvasuren Bold, Akihiro Nambu, Hiromitsu Haba","doi":"10.1140/epja/s10050-025-01643-0","DOIUrl":"10.1140/epja/s10050-025-01643-0","url":null,"abstract":"<div>The isomeric ratios and cross sections were measured up to 50 MeV for production of 198m,gAu, 197m,gHg, 195m,gHg and other Hg, Au and Pt radionuclides in irradiation of natural platinum by alpha-particles using the stacked-foil activation technique and offline gamma-ray spectrometry. The simultaneous decay curve analysis was applied to the emission rates of more than 40 gamma lines to directly derive the independent cross sections of all products without determining the cumulative cross sections. The measured cross sections and isomeric ratios were compared with those compiled in the EXFOR library and simulated by TALYS-2.0. We found that the natPt((alpha ),x)198g+mAu, 197g+mHg and 195g+mHg cross sections are fairly reproduced by the simulation, while the simulation result requires adjustment of the spin cutoff parameter for better reproduction of the isomeric ratios.</div>","PeriodicalId":786,"journal":{"name":"The European Physical Journal A","volume":"61 8","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145163179","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Angela and the electric dipole response: giant and pygmy, hot and cold, isoscalar and isovector 安吉拉和电偶极子响应：巨人和侏儒，热和冷，等标量和等矢量

IF 2.8 3区物理与天体物理

The European Physical Journal A Pub Date : 2025-08-08 DOI: 10.1140/epja/s10050-025-01657-8

Peter von Neumann-Cosel

引用次数: 0

Hot quark matter and merger remnants 热夸克物质和合并残余

IF 2.8 3区物理与天体物理

The European Physical Journal A Pub Date : 2025-08-05 DOI: 10.1140/epja/s10050-025-01654-x

Adamu Issifu, Tobias Frederico

{"title":"Hot quark matter and merger remnants","authors":"Adamu Issifu, Tobias Frederico","doi":"10.1140/epja/s10050-025-01654-x","DOIUrl":"10.1140/epja/s10050-025-01654-x","url":null,"abstract":"<div>This work investigates hot quark matter under the thermodynamic conditions characteristic of a binary neutron star (BNS) merger remnants. We used the density-dependent quark mass model (DDQM) to access the microscopic nuclear equation of state (EoS) in a series of snapshots. The strange quark matter (SQM) is studied at finite temperature and entropy, in the presence of electrons and muons and their corresponding neutrinos to simulate the BNS merger conditions. For the first time, we introduced temperature into the DDQM model using a lattice QCD-motivated approach to construct both isentropic and isothermal EoSs. We observe that as the entropy of the SQM increases, the merger remnant becomes more massive and increases in size, whereas the neutrino abundance also increases. In the fixed-temperature case, on the other hand, we observe that the entropy spreads from the surface towards the center of the remnant. We determine the particle distribution in the core of the remnants, the structure of the remnant, the temperature profile, sound velocity, and the polytropic index, and discuss their effects. The strange-quark star (SQS) remnants satisfy the (2,mathrm{M_odot }) mass constraint associated with neutron stars (NS).</div>","PeriodicalId":786,"journal":{"name":"The European Physical Journal A","volume":"61 8","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145162321","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Shear viscosity and hierarchical structure of matter 剪切粘度与物质的层次结构

IF 2.8 3区物理与天体物理

The European Physical Journal A Pub Date : 2025-07-31 DOI: 10.1140/epja/s10050-025-01653-y

Daichi Kagamihara, Munekazu Horikoshi, Chiho Nonaka, Yoji Ohashi, Kenta Shigaki

引用次数: 0

Searching for bound states in the open strangeness systems 寻找开放奇异系统中的束缚态

IF 2.8 3区物理与天体物理

The European Physical Journal A Pub Date : 2025-07-31 DOI: 10.1140/epja/s10050-025-01648-9

C. W. Xiao, J. J. Wu

引用次数: 0

Nuclear quantum many-body dynamics (2nd edition) 核量子多体动力学（第二版）

IF 2.8 3区物理与天体物理

The European Physical Journal A Pub Date : 2025-07-31 DOI: 10.1140/epja/s10050-025-01624-3

Cédric Simenel

{"title":"Nuclear quantum many-body dynamics (2nd edition)","authors":"Cédric Simenel","doi":"10.1140/epja/s10050-025-01624-3","DOIUrl":"10.1140/epja/s10050-025-01624-3","url":null,"abstract":"<div>This article is a new edition of the review (Eur Phys J A 48:152, 2012). The increase in computational power has naturally led to new applications of mean-field (and beyond) methods. This is particularly the case of quasi-fission reactions. Since the first edition, significant progress has also been made in treating pairing correlations dynamically, leading to realistic applications in multi-nucleon transfer, fusion and fission reactions. A new section has been added on fission dynamics. A summary of recent researches on nuclear dynamics with realistic microscopic quantum approaches is presented. The Balian–Vénéroni variational principle is used to derive the time-dependent Hartree–Fock equation describing the dynamics at the mean-field level, as well as an extension including small-amplitude quantum fluctuations which is equivalent to the time-dependent random-phase approximation. Such formalisms as well as their practical implementation in the nuclear physics framework with modern three-dimensional codes are discussed. Recent applications to nuclear dynamics, from collective vibrations to heavy-ion collisions are presented. A particular attention is devoted to the interplay between collective motions and internal degrees of freedom. For instance, the harmonic nature of collective vibrations is questioned. Large amplitude collective motions are investigated in the framework of heavy-ion collisions and fission. How fusion is affected by the internal structure of the collision partners, such as their deformation, is discussed. Other mechanisms in competition with fusion, and responsible for the formation of fragments which differ from the entrance channel (transfer reactions, deep-inelastic collisions, and quasi-fission) are investigated. Finally, studies of actinide collisions forming, during very short times of few zeptoseconds, the heaviest nuclear systems available on Earth, are presented.</div>","PeriodicalId":786,"journal":{"name":"The European Physical Journal A","volume":"61 7","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epja/s10050-025-01624-3.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144927152","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Can the effects of tetraneutron correlations be observed in low-density, laboratory-accessible, neutron-rich matter? 四中子相关的效应能否在低密度、实验室可及、富含中子的物质中观察到？

IF 2.8 3区物理与天体物理

The European Physical Journal A Pub Date : 2025-07-31 DOI: 10.1140/epja/s10050-025-01652-z

H. Pais, G. Röpke, J. B. Natowitz

{"title":"Can the effects of tetraneutron correlations be observed in low-density, laboratory-accessible, neutron-rich matter?","authors":"H. Pais, G. Röpke, J. B. Natowitz","doi":"10.1140/epja/s10050-025-01652-z","DOIUrl":"10.1140/epja/s10050-025-01652-z","url":null,"abstract":"<div>Multi-nucleon correlations, present in low- density neutron-rich matter may play an important role in astrophysical environments. In the laboratory heavy-ion collisions and ternary fission are capable of producing neutron enriched matter having thermodynamic conditions of low densities and moderate temperatures similar to those encountered in neutron star crusts, supernovae and binary mergers. In this work, we study the effect of including a resonant state of four neutrons in the low-density warm nuclear equation of state, using a relativistic mean-field formalism, where in-medium effects are considered. For that purpose, the abundances of isotopes (Zle 6) immersed in a gas of protons and neutrons, are calculated with and without the presence of this resonant tetra-neutron state. To provide a baseline test of this approach, the yields of isotopes calculated with and without the tetra-neutron included are then compared with experimentally observed ternary fission yields. While the results indicate that the tetra-neutron has little effect on yields of other clusters under the existing ternary fission conditions, a possibly observable effect on yields of clusters emitted from the neck region in mid-peripheral heavy ion collisions is suggested.</div>","PeriodicalId":786,"journal":{"name":"The European Physical Journal A","volume":"61 7","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epja/s10050-025-01652-z.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145171739","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Mirror-skin thickness: a possible observable sensitive to the charge symmetry breaking energy density functional 镜皮厚度：对电荷对称破缺能量密度泛函敏感的可能观测值

IF 2.8 3区物理与天体物理

The European Physical Journal A Pub Date : 2025-07-28 DOI: 10.1140/epja/s10050-025-01646-x

Tomoya Naito, Yuto Hijikata, Juzo Zenihiro, Gianluca Colò, Hiroyuki Sagawa

{"title":"Mirror-skin thickness: a possible observable sensitive to the charge symmetry breaking energy density functional","authors":"Tomoya Naito, Yuto Hijikata, Juzo Zenihiro, Gianluca Colò, Hiroyuki Sagawa","doi":"10.1140/epja/s10050-025-01646-x","DOIUrl":"10.1140/epja/s10050-025-01646-x","url":null,"abstract":"<div>We propose a new observable, named the mirror-skin thickness, in order to extract the strength of the charge symmetry breaking (CSB) term in an energy density functional (EDF). The mirror-skin thickness of ( N = 20 ) isotones and ( Z = 20 ) isotopes is studied by using Hartree-Fock-Bogoliubov (HFB) calculations with various Skyrme EDFs and adding CSB and charge independence breaking (CIB) terms. It is shown that the mirror-skin thickness is sensitive only to the CSB EDF, but hardly depends on either the isospin symmetric part of the nuclear EDF or the CIB term. Therefore, this observable can be used to extract the magnitude of the CSB term in the EDF quantitatively, either from experimental data or ab initio calculations. We have studied the accuracy in the mirror-skin thickness that is needed to extract sensible information. Our study may also help to understand the inconsistency between the strength of the phenomenological CSB and that extracted from ab initio calculations [Naito et al. Nuovo. Cim. C 47, 52 (2024)]. Among possible mirror pairs for experimental study, we propose the mirror-skin thickness between ( {}^{42} textrm{Ca} ) and ( {}^{42} textrm{Ti} ), which could be accessed in future experiments in RIBF and/or FRIB.</div>","PeriodicalId":786,"journal":{"name":"The European Physical Journal A","volume":"61 7","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145171056","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Complex deuteron NMR signals 复合氘核磁共振信号

IF 2.8 3区物理与天体物理

The European Physical Journal A Pub Date : 2025-07-26 DOI: 10.1140/epja/s10050-025-01644-z

Michael McClellan, Elena Long

引用次数: 0