The European Physical Journal D最新文献

{"title":"Two-photon excited fluorescence with shaped laser pulses for refractive beams","authors":"S. S. A. S. Bukhari,&nbsp;R. Gottschalk,&nbsp;A. Lindinger","doi":"10.1140/epjd/s10053-025-00953-8","DOIUrl":"10.1140/epjd/s10053-025-00953-8","url":null,"abstract":"<p>We report two-photon excited fluorescence of dyes for refracted laser beams by utilizing tailored laser pulses. A fluorescence contrast difference due to phase shaping could be achieved between different coumarin dyes. Particularly, an increased contrast difference is obtained for configurations close to the Brewster angle. Furthermore, by using a subsequent deformable phase plate for spatial shaping it was possible to precisely adjust the laser beam for controlled refraction at the liquid dye surface. A polarization-dependent refraction was observed when directing the shaped laser beam on the curved liquid adhesion meniscus close to the cuvette wall. This results in a refraction-dependent contrast difference. The presented method could be utilized for surface-sensitive biophotonic imaging applications.</p>","PeriodicalId":789,"journal":{"name":"The European Physical Journal D","volume":"79 2","pages":""},"PeriodicalIF":1.5,"publicationDate":"2025-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epjd/s10053-025-00953-8.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143109936","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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":"Controlling atomic wave interference by counter-propagating light pulses of different carrier frequencies","authors":"Victor I. Romanenko,&nbsp;Nataliya V. Kornilovska,&nbsp;Leonid P. Yatsenko","doi":"10.1140/epjd/s10053-025-00956-5","DOIUrl":"10.1140/epjd/s10053-025-00956-5","url":null,"abstract":"<p>We consider the interaction of a two-level atom with two counter-propagating light pulses of different carrier frequencies. To ensure adiabatic interaction, the pulse duration is much longer than both the inverse frequency difference and the maximum Rabi frequencies of the pulses. For the first time, we examine the case where the atom is initially prepared in a superposition of the ground and excited states with a momentum difference corresponding to one-photon recoil. We identify the conditions under which the atom’s final state is determined by the phase difference of the momentum components of the initial atomic wave. Given the large pulse duration, the interference effects depend critically on the rate of spontaneous emission from the excited state. We analyze the role of spontaneous emission using the Monte Carlo wave function method. The results of our calculations elucidate the influence of spontaneous radiation on both the momentum transferred to the atom and the interference outcome of the two atomic waves.</p>","PeriodicalId":789,"journal":{"name":"The European Physical Journal D","volume":"79 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2025-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143109801","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":"Electron-impact ionization TDCS of a nitrogen molecule using the DWBA and IAM-AR","authors":"D. Buljubasic,&nbsp;P. K. Kariuki,&nbsp;J. Okumu","doi":"10.1140/epjd/s10053-025-00957-4","DOIUrl":"10.1140/epjd/s10053-025-00957-4","url":null,"abstract":"<p>Reported triple differential cross sections (TDCS) for electron-impact ionization of nitrogen molecule have been calculated by employing distorted-wave Born approximation (DWBA) and independent-atom model (IAM), for incident electron energy of 500 eV, and ejected electron energies of 37 eV, 74 eV, and 205 eV, in coplanar asymmetric geometry. Scattering amplitudes of independent nitrogen atoms calculated in the DWBA were used to determine the TDCS of the molecule in IAM. The obtained results are compared to available experimental and theoretical data. Reasonably good qualitative and quantitative agreement was found for low to intermediate ejected electron energies, in terms of binary and recoil peak prediction. Quantitative discrepancies at higher ejected electron energies are attributed to the DWBA limitations.\u0000</p>","PeriodicalId":789,"journal":{"name":"The European Physical Journal D","volume":"79 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2025-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143109365","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":"Eco-friendly fabrication of selenium oxide nanoparticles by low-temperature plasma technique and evaluation of their antimicrobial activity","authors":"Nisreen Kh. Abdalameer,&nbsp;Nadia Jasim Ghdeeb,&nbsp;Kawther A. Khalaph,&nbsp;Yasmine Taha","doi":"10.1140/epjd/s10053-025-00952-9","DOIUrl":"10.1140/epjd/s10053-025-00952-9","url":null,"abstract":"<div><p>Nanoscale selenium oxide is a significant substance because of its extensive use in health, manufacturing, and electronics. The present study involves the manufacture of selenium oxide nanoparticles using <i>Syzygium Aromaticum</i> flower plant extract as a reducing agent and employing cold plasma technology to enhance the nanosynthesis process. An investigation was conducted to analyze the impact of various synthesis circumstances on the characteristics of the resultant particles, including particle size, size distribution, and form. Scanning electron microscopy and ultraviolet–visible spectroscopy have been used to investigate the physicochemical characteristics of the nanoparticles produced. The findings demonstrated that using clove flower extract as an eco-friendly and renewable substance in the synthesis procedure enhanced the characteristics of nano selenium oxide, thereby presenting a viable substitute for conventional chemical-based approaches. The cold plasma technique has shown efficacy in precisely regulating particle size and dispersion. The work highlights the significance of using natural resources with contemporary technologies in synthesizing nanomaterials. It paves the way for further investigations into using plant extracts in nanotechnology applications.</p><h3>Graphical abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div><div><p>Selenium oxide nanoparticles by low-temperature plasma technique</p></div></div></figure></div></div>","PeriodicalId":789,"journal":{"name":"The European Physical Journal D","volume":"79 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2025-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143109364","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":"Parametric representation, asymptotic and bifurcation analyses of the electronic plasma oscillations","authors":"Alexandr A. Barsuk,&nbsp;Florentin Paladi","doi":"10.1140/epjd/s10053-024-00949-w","DOIUrl":"10.1140/epjd/s10053-024-00949-w","url":null,"abstract":"<div><p>Real (non-damped) solutions of the dispersion equation first derived by A.A. Vlasov for the oscillations of the electronic plasma are studied. We present the exact solutions of the Vlasov’s dispersion equation in the parametric form. It is shown that the value of the singular integral entering the dispersion equation coincides with the calculated one obtained in the sense of Cauchy principal value. The frequency values of the oscillations are derived in the parametric representation without prior assumptions, which supports the fundamental concept of self-consistent field of charged particles leading to the Vlasov decay of spatial oscillations. Ultimately, this helps in understanding the historical controversy on Vlasov modes and Landau damping as relaxation mechanisms in the electronic plasma. Bifurcation values of parameters and the asymptotic representations for the obtained solutions in the parametric form are also discussed.</p><h3>Graphical abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":789,"journal":{"name":"The European Physical Journal D","volume":"79 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2025-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143109778","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":"Space-resolved transport properties of the thermalizing particle ensemble via Monte Carlo simulations","authors":"Z. M. Raspopović","doi":"10.1140/epjd/s10053-025-00951-w","DOIUrl":"10.1140/epjd/s10053-025-00951-w","url":null,"abstract":"&lt;div&gt;&lt;p&gt;Understanding the thermalization process of mono-energetic particle beams in gases is fundamental for various applications in plasma physics. A statistical model is introduced and analyzed through Monte Carlo simulations. The simulations are initialized with a delta-function impulse of a non-interacting particle beam colliding with a gas in an infinite domain at a finite temperature. Spatially-resolved profiles of the thermalizing particles, including their average kinetic energy, reveal spatial variations during their evolution. The overall energy balance over time reveals that the local kinetic energy near the center of mass of the thermalizing particles is lower than the thermal energy of the gas, a phenomenon referred to as ‘diffusive cooling’. At the periphery of the particle swarm, the local kinetic energy exceeds the thermal energy, resulting in ‘diffusive heating’. Previous studies have mostly examined these phenomena separately and in confined spaces, such as those observed in the Cavalleri experiment. These effects are explored in an unbounded gas. Calculated quasi-stationary, spatially-resolved profiles in an unbounded gas are compared with stationary profiles observed in confined systems between two infinite planes with perfect absorption. The effective diffusion coefficient, derived from the diffusion equation used in the Cavalleri model, is shown to align with the flux value of the transverse diffusion coefficient predicted by swarm theory. Additionally, it was observed that certain thermalized particles exhibit higher kinetic energy than their initial values at both the front and tail edges of the beam, marking an unexpected transitional phenomenon in the evolution of the beam swarm.&lt;/p&gt;&lt;h3&gt;Graphical abstract&lt;/h3&gt;&lt;p&gt;The graphical abstracts show two images:&lt;/p&gt;&lt;p&gt;Figure A presents the quasi-stationary, spatially-resolved profile of the ion dissipated power due to elastic collisions, PD(z) in an unlimited space. Within the range from -1σz to +1σz , the local values of PD(z) are negative, while beyond 1σz , PD(z) becomes positive. Here σz represents the standard deviation of the spatial distribution of the ions along their initial velocity direction. Since approximately 68% of thermalizing particles fall within the -1σz to +1σz range of the Gaussian distribution, this indicates that, during thermalization, 68% of the particles experience collisional heating, while 38% of them undergo collisional cooling.&lt;/p&gt;&lt;div&gt;&lt;figure&gt;&lt;div&gt;&lt;div&gt;&lt;picture&gt;&lt;source&gt;&lt;img&gt;&lt;/source&gt;&lt;/picture&gt;&lt;/div&gt;&lt;div&gt;&lt;p&gt;Quasi-stationary spatially-resolved ion dissipated power density and ion number density&lt;/p&gt;&lt;/div&gt;&lt;/div&gt;&lt;/figure&gt;&lt;/div&gt;&lt;p&gt;Figure B depicts the effective diffusion coefficient, derived from solving the Boltzmann equation that models the Cavalleri diffusion experiment (involving particle diffusion in a gas between two fully absorbing parallel planes). This effective diffusion coefficient is lower than the thermal diffusion values. It essentially repr","PeriodicalId":789,"journal":{"name":"The European Physical Journal D","volume":"79 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2025-01-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143109223","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":"Enhanced circular dichroism induced by connectivity effect of rectangular metal nanorods","authors":"Hang Zhang,&nbsp;Zhongtao Liu,&nbsp;Lei Liu,&nbsp;Hui Li","doi":"10.1140/epjd/s10053-024-00943-2","DOIUrl":"10.1140/epjd/s10053-024-00943-2","url":null,"abstract":"<p>Compared to natural chiral structures, planar chiral plasmonic nanostructures, which are two-dimensional artificial structures composed of noble metals that break mirror symmetry, are widely applied in fields such as analytical chemistry, pharmaceutical production, and bioanalytical monitoring. Understanding circular dichroism (CD) and its enhancement mechanisms is crucial for these applications. Although a variety of chiral structures have been extensively studied, a deep understanding of the tunability of the CD effect remains insufficient. In particular, helical structures face challenges such as difficult fabrication and poor tunability. In this study, we designed a chiral structure composed of rectangular metal nanorods and metallic spheres, aiming to achieve a significant tunable CD effect by utilizing the connectivity effect of the metal nanorods, reaching an impressive CD value of 0.7. Results calculated by the finite element method show that, near the resonant wavelengths of 710 nm and 730 nm, the spectral responses of <span>({T}_{++})</span> and <span>({T}_{--})</span>, respectively, exhibit peak and valley patterns, thereby generating a substantial CD effect. Fundamentally, this is due to the shifting of the resonance modes at these specific wavelengths under RCP and LCP light. The extent of this shift can be precisely manipulated by altering the width of the rectangular metal nanorods, thus enabling controlled CD effects. Moreover, the CD effect is found to be highly dependent upon the geometric parameters of the designed structures. In summary, these findings contribute significantly to the development of planar chiral plasmonic nanostructures with tunable and large CD effects, providing valuable insights for their optimization and practical applications.</p>","PeriodicalId":789,"journal":{"name":"The European Physical Journal D","volume":"79 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2025-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142995558","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":"Study on the coupling and ion acceleration between ultraintense laser and multilayer solid targets","authors":"Chong Lv,&nbsp;Jialun Chai,&nbsp;Xiaona Ban,&nbsp;Wei Sun","doi":"10.1140/epjd/s10053-024-00950-3","DOIUrl":"10.1140/epjd/s10053-024-00950-3","url":null,"abstract":"<p>This study focuses on optimizing beam driving modes to enhance laser-target coupling efficiency and improve particle quality in laser-driven ion acceleration. The aim is to increase proton and ion beam energy. Two-dimensional particle-in-cell simulations are conducted to investigate the proton beam generated by a Petawatt laser-driven multilayer target. The results indicate that optimal space overlap between the laser and targets improves energy coupling efficiency. Numerical simulation results indicate that the overlap of two laser pulses in front of the target, specifically at the same focal point, results in the generation of higher-energy ion beams. This result is primarily attributed to the enhanced longitudinal electric field under such conditions, which leads to increased energies of protons and ions. By adjusting the longitudinal size of the CH layer, a high-quality proton beam with a maximum cut-off energy of approximately 290 MeV and a small energy spread of 5.2<span>(%)</span> and 14.7<span>(%)</span> is achieved</p>","PeriodicalId":789,"journal":{"name":"The European Physical Journal D","volume":"79 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2025-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142994547","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":"Atomic spectra and oscillator strengths (ASOS14)","authors":"W.-Ü Lydia Tchang-Brillet,&nbsp;Paul Indelicato,&nbsp;Alexander Kramida,&nbsp;Stefan Schippers,&nbsp;Glenn Wahlgren","doi":"10.1140/epjd/s10053-024-00948-x","DOIUrl":"10.1140/epjd/s10053-024-00948-x","url":null,"abstract":"","PeriodicalId":789,"journal":{"name":"The European Physical Journal D","volume":"79 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2025-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142939111","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":"Hyperfine structure constants for neutral and singly ionized manganese using Fourier transform spectra","authors":"Hongfeng Zheng,&nbsp;Die Fang,&nbsp;Liguang Jiao,&nbsp;Xiaolei Che,&nbsp;Zhenwen Dai","doi":"10.1140/epjd/s10053-024-00945-0","DOIUrl":"10.1140/epjd/s10053-024-00945-0","url":null,"abstract":"<div><p><b>We utilized the archival data recorded by the Fourier transform spectrometer at the USA National Solar Observatory to investigate the hyperfine structure (HFS) for neutral manganese (Mn I) and singly ionized manganese (Mn II) levels.</b> HFS constants for 25 levels of Mn I between 24,779 cm⁻¹ and 62,671 cm⁻¹ and, those for 14 levels of Mn II between 38,366 cm⁻¹ and 99,893 cm⁻¹ were determined by analyzing 100 spectral lines, among which the results for 15 levels of Mn I and eight levels of Mn II are reported for the first time, to our best knowledge. <b>This increases the total number of levels with experimental HFS constants to 182 for Mn I and 116 for Mn II.</b> For two Mn I levels and one Mn II level, both magnetic dipole HFS constants <i>A</i> and electric quadrupole HFS constants <i>B</i> were obtained. For the other levels, only <i>A</i> constants were determined. The uncertainties of most of the HFS constants determined in this work are less than 10%.</p><h3>Graphical abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":789,"journal":{"name":"The European Physical Journal D","volume":"79 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2025-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142939198","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}