物理最新文献

{"title":"Scalar fully-charm and bottom tetraquarks under extreme temperatures","authors":"A. Aydın,&nbsp;H. Sundu,&nbsp;J. Y. Süngü,&nbsp;E. Veli Veliev","doi":"10.1140/epjc/s10052-025-14090-4","DOIUrl":"10.1140/epjc/s10052-025-14090-4","url":null,"abstract":"<div><p>Temperature-dependences of masses and current couplings of the ground state of the fully heavy tetraquarks <span>(T_{4c})</span> and <span>(T_{4b})</span>, composed of charm (c) and bottom (b) quarks and antiquarks with spin-parities <span>(J^{PC} = 0^{++})</span> are evaluated in the diquark–antidiquark picture using Thermal QCDSR including vacuum condensates up to dimension four. The calculated values for <span>(ccbar{c}bar{c})</span> and <span>(bbbar{b}bar{b})</span> tetraquark states at <span>(T=0)</span> align well with the experimental data on the broad structures. Based on the numerical analyses around the critical temperature, the mass of the <span>(T_{4c})</span> state decreases by <span>(8%)</span> compared to its vacuum state, while for its b partner, this percentage is approximately <span>(3.3%)</span>. For the decay constants, the reductions are approximately <span>(71%)</span> and <span>(66.6%)</span>, respectively. The precise exploration of tetraquark states awaits future scrutiny in upcoming experiments, including Belle II, Super-B, PANDA, and LHCb.\u0000\u0000</p></div>","PeriodicalId":788,"journal":{"name":"The European Physical Journal C","volume":"85 5","pages":""},"PeriodicalIF":4.2,"publicationDate":"2025-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epjc/s10052-025-14090-4.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144125849","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}

{"title":"Optimization of 210Pb gamma-ray spectrometry determination in NORM samples","authors":"Tereza Doksanská,&nbsp;Miroslav Hýža,&nbsp;Mahulena Kořistková","doi":"10.1140/epjp/s13360-025-06372-3","DOIUrl":"10.1140/epjp/s13360-025-06372-3","url":null,"abstract":"<div><p>This study investigates the optimization of ²¹⁰Pb determination in NORM samples using gamma-ray spectrometry in routine laboratory settings. It evaluates three methods of assessment: (A) sample in a ‘volume geometry’ with composition-estimated correction factor calculation, (B) thin layer measurement with composition-estimated correction calculation, and (C), thin layer measurement with experimental correction factor determination. The latter involves a direct measurement of the material-specific attenuation coefficient via a collimated photon beam, followed by a simplified Monte Carlo calculation of the self-absorption correction factor. A total of 107 samples representing a broad spectrum of NORM materials such as coal ash, sludge, cement byproducts, and zircon sands, were analyzed. The results reveal that ‘volume geometries’ are inadequate for ²¹⁰Pb determination, primarily due to excessive photon attenuation, even when the sample composition is known. Thin layer geometry with composition-estimated correction factors markedly improved accuracy, making this approach suitable for materials covering coal combustion products (ash and slag), byproducts of cement, old building materials, rocks, soil and furnace linings. However, experimental approach was the only reliable method for samples with high densities, complex compositions, or elevated attenuation coefficients—such as zircon sands. These findings contribute to the optimal use of resources and time.</p><h3>Graphical abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":792,"journal":{"name":"The European Physical Journal Plus","volume":"140 5","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144125853","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}

{"title":"Parameter constraints and cosmographic analysis of Barrow agegraphic and new Barrow agegraphic dark energy models","authors":"Anamika Kotal,&nbsp;Sayani Maity,&nbsp;Ujjal Debnath,&nbsp;Anirudh Pradhan","doi":"10.1140/epjc/s10052-025-14294-8","DOIUrl":"10.1140/epjc/s10052-025-14294-8","url":null,"abstract":"<div><p>This research focuses on examining a non-flat Friedmann–Robertson–Walker (FRW) cosmological model of the universe incorporating both dark matter and dark energy. Two intriguing dark energy models, Barrow agegraphic dark energy (BADE) and new Barrow agegraphic dark energy (NBADE), which were introduced in accordance with the holographic principle incorporating Barrow entropy, have been selected to play the role of dark energy. Using datasets from cosmic chronometers and baryon acoustic oscillations, we utilized the Markov Chain Monte Carlo (MCMC) technique to constrain the parameters of our model. This enables us to make several possible comparisons between these novel models of dark energy and the <span>(Lambda )</span>CDM models. Here, we explore cosmological parameters, including the equation of state(EoS) parameter, jerk parameter, deceleration parameter, and cosmological planes such as the <span>(q-r)</span> plane, <span>(omega _d - omega '_d)</span> for different values of the model parameters by considering both the presence and absence of mutual interactions of the dark sector of the universe. In addition, we examined the thermal stability and the Swampland criteria of our constructed models. Additionally, we analyze the energy conditions and find that NEC and DEC are fulfilled, but SEC is broken, indicating model stability and supporting the current acceleration of the universe. In order to give a more precise explanation of the origin of cosmic structures, we lastly conduct a linear perturbation analysis to examine the growth in matter density perturbations.</p></div>","PeriodicalId":788,"journal":{"name":"The European Physical Journal C","volume":"85 5","pages":""},"PeriodicalIF":4.2,"publicationDate":"2025-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epjc/s10052-025-14294-8.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144117740","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}

{"title":"Editorial: Umut Gürsoy (1975–2025)","authors":"Elias Kiritsis,&nbsp;Francesco Nitti,&nbsp;Stefan Vandoren,&nbsp;Emilian Dudas","doi":"10.1140/epjc/s10052-025-14292-w","DOIUrl":"10.1140/epjc/s10052-025-14292-w","url":null,"abstract":"","PeriodicalId":788,"journal":{"name":"The European Physical Journal C","volume":"85 5","pages":""},"PeriodicalIF":4.2,"publicationDate":"2025-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epjc/s10052-025-14292-w.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144125850","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}

{"title":"Structural, elastic, optoelectronic, thermodynamic and thermoelectric properties of the new halide double perovskite Cs2CaGeI6: first-principles study","authors":"Chikh Ali Hadji,&nbsp;Amina Arrar,&nbsp;Mohamed Ghaleb,&nbsp;Otmane Zerrouki,&nbsp;Hadjer Bendjilali","doi":"10.1140/epjb/s10051-025-00949-8","DOIUrl":"10.1140/epjb/s10051-025-00949-8","url":null,"abstract":"<div><p>The structural, elastic, optical, thermodynamic, and thermoelectri<b>c</b> properties of Cs₂CaGeI₆ double perovskite were investigated using density functional theory simulations. The calculations show that the material is elastically stable and isotropic. Furthermore, with an endurance factor of <i>t</i> = 0.89 and an energy of formation of <i>Ef</i> =  − 0.97 Ev. Our calculations demonstrate the high structural stability of perovskite materials. GGA-PBE and TB-mBJ are used to approximate the electrical properties while introducing spin–orbit coupling. The compound's high absorption and indirect bandgap semiconductor capabilities make it a prospective rival for solar cells. The thermal characteristics for temperatures between 50 and 1000 K were investigated using the BoltzTraP algorithm. Furthermore, we used the Gibbs software to compute the thermodynamic characteristics of Cs₂CaGeI₆ double halide perovskite. Additionally, the studied Cs₂CaGeI₆ combination has a good figure of merit at room temperature, suggesting that its thermodynamic and thermoelectric properties offer potential for use in thermoelectric technology.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":787,"journal":{"name":"The European Physical Journal B","volume":"98 5","pages":""},"PeriodicalIF":1.6,"publicationDate":"2025-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144125620","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}

{"title":"Influence of wave-maker shape on the wave attractor","authors":"Stepan Elistratov,&nbsp;Daria Ilina","doi":"10.1007/s12043-025-02927-2","DOIUrl":"10.1007/s12043-025-02927-2","url":null,"abstract":"<div><p>Internal waves in a stratified liquid propagate to fit the dispersion relation, depending only on the frequency and the angle to the gravity. The phenomenon of self-focussing of such waves is known as wave attractor. To study this phenomenon numerically or in a laboratory, it is common to use a wave-maker providing the forcing through one of the boundaries. In this work, we study the influence of the wave-maker forcing on the wave attractor formation and its characteristics. \u0000</p></div>","PeriodicalId":743,"journal":{"name":"Pramana","volume":"99 2","pages":""},"PeriodicalIF":1.9,"publicationDate":"2025-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144117705","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}

{"title":"Visible light-driven Nd-ZnSe: Structural insights and enhanced photocatalytic degradation of Congo red dye","authors":"Kavitha P,&nbsp;Menaka R,&nbsp;Jayaprakash J,&nbsp;Nijarubini V,&nbsp;Priyadharsini N","doi":"10.1007/s00339-025-08598-5","DOIUrl":"10.1007/s00339-025-08598-5","url":null,"abstract":"<div><p>In this study, cubic zinc blende ZnSe and Nd-doped ZnSe (Zn_1−xNd_xSe; x = 0.05) nanomaterials were synthesized using a co-precipitation protocol to investigate their photocatalytic performance for Congo Red (CR) dye degradation. The pH of the growth medium was adjusted to 3.0, 5.0, and 7.0 in an acidic medium using hydrazine hydrate as the reducing agent to study its impact on the synthesis conditions of the semiconductor chalcogenide. The cubic structure was confirmed through structural analysis, which revealed a decrease in particle size with increasing pH. The optimal growth condition was identified based on morphological analysis. Optical studies showed a reduced band gap (2.46 eV at pH 5) due to Nd doping, facilitating visible light absorption and enhancing photodegradation activity. The neodymium doped ZnSe NPs demonstrated exceptional photocatalytic efficacy for the degrading Congo Red dye under sunlight, achieving 94.3% degradation within 80 min. Adsorption kinetics followed the first-order and Elovich models, while the Temkin isotherm provided the best fit for the synthesized catalyst, indicating strong dye-catalyst interactions. After four cycles of stability testing, the catalyst maintained over 95% efficiency, demonstrating its remarkable durability and potential for sustainable wastewater treatment.</p></div>","PeriodicalId":473,"journal":{"name":"Applied Physics A","volume":"131 6","pages":""},"PeriodicalIF":2.5,"publicationDate":"2025-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144125495","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Linking pedological and atmospheric environments for the conservation and management of earthen archaeological sites: development of a novel technique","authors":"Jerrod Seifert,&nbsp;Ashley Lingle,&nbsp;Jesse Wolfhagen,&nbsp;Therese Corton,&nbsp;Paul Duffy,&nbsp;William Parkinson,&nbsp;William Ridge,&nbsp;Danielle Riebe,&nbsp;Attila Gyucha","doi":"10.1140/epjp/s13360-025-06342-9","DOIUrl":"10.1140/epjp/s13360-025-06342-9","url":null,"abstract":"<div><p>Exposed in-situ earthen archaeological structures are extremely prone to accelerated deterioration. Environmental cycles that cause swelling, salt efflorescence, and biological decay are but a few ways this breakdown is exacerbated, resulting in earthen archaeological remains rapidly losing coherence, shape, and ultimately cultural value. Several invasive methods have been attempted to cessate this process, to varying effectiveness. However, only recently has quantified site deterioration been correlated with environmental data. Results from these reports showed that the soil moisture of walls and profiles could potentially be used as an indicator of earthen archaeology deterioration rates. Determining any link between the soil moisture content surrounding an archaeological site and its exposed atmosphere could be beneficial when developing site management plans to mitigate deterioration. To determine if such a link exists, four soil moisture profile probes were installed at Vésztő-Mágor, a sheltered, prehistoric earthen archaeological site located in modern-day Hungary. The shelter induces severe microclimatic fluctuations whilst removing several external factors that impact deterioration, such as wind and sun exposure, providing a scenario that is advantageous for detecting any link. The novel horizontal installation of the probes in a vertical column captured moisture data within unexcavated archaeological horizons. This data was then compared to relative humidity data acquired around excavated archaeological profiles. Through the application of a Bayesian autoregressive AR(1) logistic model, the data suggests that a link between these two environments exists. Furthermore, moisture probe data confirms that the excavation of archaeological profiles at Vésztő-Mágor impacts unexcavated archaeological horizons at least 30 cm inward. This paper discusses the implementation of this method, the statistical analysis of the data, and its implications for managing earthen archaeological sites.</p></div>","PeriodicalId":792,"journal":{"name":"The European Physical Journal Plus","volume":"140 5","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epjp/s13360-025-06342-9.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144125794","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}

{"title":"High-accuracy calculation on relativistic Compton profile of H-like ions","authors":"Jian-Jie Wan,&nbsp;Fan Wu,&nbsp;Jie Gu","doi":"10.1140/epjp/s13360-025-06378-x","DOIUrl":"10.1140/epjp/s13360-025-06378-x","url":null,"abstract":"<p>The generalized pseudospectral (GPS) method has been used to solve the radial Dirac equation. It has been found that the energies of the bound states can be calculated with high accuracy, but there are inherent difficulties in obtaining globally accurate radial wavefunctions in position space, which are accurate only at intermediate <i>r</i> in position space. To improve the global performance of relativistic radial wavefunctions, a fitting procedure based on the structure of hydrogenic orbitals has been proposed, which can be called the pseudospectral fitting method. Then, the relativistic radial wavefunction in momentum space can be calculated analytically by the series method. Finally, a highly accurate relativistic Compton profile has also been calculated at an arbitrary momentum. In addition, the relativistic effect on the Compton profile of the 1<i>s</i> orbital in the H atom, <span>(text {Xe}^{53+})</span> and <span>(text {U}^{91+})</span> ions as well as the effect of the nuclear charge distribution on the Compton profile has been discussed in detail based on various extended models of the nucleus, including the uniform sphere model (USM), the Gaussian model (GM) and the Fermi model (FM).</p>","PeriodicalId":792,"journal":{"name":"The European Physical Journal Plus","volume":"140 5","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144125795","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}

{"title":"The role of Nitrogen during selenization in enhancing CZTS thin film properties","authors":"Vishvas Kumar,&nbsp;Udai P. Singh","doi":"10.1007/s00339-025-08615-7","DOIUrl":"10.1007/s00339-025-08615-7","url":null,"abstract":"<div><p>The kesterite (Cu₂ZnSn(SSe)₄) thin film’s material properties strongly depend on the annealing parameters. The formation of good property kesterite films requires annealing at high temperatures. The properties of the CZTSe films are impacted by changes in the annealing parameters. The two most important annealing parameters are the annealing temperature profile and the annealing environment. The characteristics of the film are impacted by variations in the annealing atmosphere. In order to study the impact of the annealing environment on the CZTSe compound semiconductor, each element of CZTSe was deposited using the thermal deposition technique in a sequence of CuSn, Zn, Se, followed by the annealing process. In the current study, the films were annealed at the same temperature in both the Se and Se + N₂ atmospheric conditions to produce the CZTSe compound. The annealing was done in a two-step process. Films were first annealed for 10 min at 230 °C, followed by 10 min at 450 °C. Two different sets of films were fabricated. The paper describes in detail the impact of annealing atmospheres of Se + N₂ and Se on the unit cell structure and other characteristics of the CZTSe thin film. It was shown that the CZTS film annealed in Se + N₂ atmosphere has improved properties.</p></div>","PeriodicalId":473,"journal":{"name":"Applied Physics A","volume":"131 6","pages":""},"PeriodicalIF":2.5,"publicationDate":"2025-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s00339-025-08615-7.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144117646","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}