The European Physical Journal D最新文献

{"title":"On the importance of using realistic partition functions in kilonova opacity calculations","authors":"Helena Carvajal Gallego,&nbsp;Jérôme Deprince,&nbsp;Michel Godefroid,&nbsp;Stéphane Goriely,&nbsp;Patrick Palmeri,&nbsp;Pascal Quinet","doi":"10.1140/epjd/s10053-023-00638-0","DOIUrl":"10.1140/epjd/s10053-023-00638-0","url":null,"abstract":"<p>In the present work, we report an investigation on the importance of using realistic partition functions in the opacity calculations of lanthanide ions whether they are moderately or lowly ionized. In order to do this, atomic data for various moderately charged samarium (Sm V–XI) and lowly charged neodymium (Nd II–IV) ions were calculated by the pseudo-relativistic Hartree–Fock method (HFR) and then, used to compute the expansion opacities for conditions characterizing the ejecta of kilonovae observed as a result of neutron star mergers, with a particular attention given to the partition function computations.</p>","PeriodicalId":789,"journal":{"name":"The European Physical Journal D","volume":"77 5","pages":""},"PeriodicalIF":1.8,"publicationDate":"2023-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4428475","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":"R-matrix atomic data for application in astrophysics and fusion","authors":"C. A. Ramsbottom,&nbsp;C. P. Ballance,&nbsp;M. McCann","doi":"10.1140/epjd/s10053-023-00640-6","DOIUrl":"10.1140/epjd/s10053-023-00640-6","url":null,"abstract":"<p>A selection of electron-impact excitation <i>R</i>-matrix calculations completed by the collision group at Queens University Belfast are discussed. The atomic data calculated are the foundation of applications in a variety of fields, a sample of which are presented here. They include an analysis of Fe <span>ii</span> emission in active galactic nuclei, the possible presence of Pt and Au in the spectra of binary neutron star mergers and the viability of W ions as a diagnostic tool in magnetically confined tokamak plasmas. The radiative atomic data were computed using the most recent version of the fully relativistic structure code <span>grasp0</span> and the collision cross sections were evaluated using the recently developed <span>pdarc</span> <i>R</i>-matrix package.</p>","PeriodicalId":789,"journal":{"name":"The European Physical Journal D","volume":"77 5","pages":""},"PeriodicalIF":1.8,"publicationDate":"2023-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epjd/s10053-023-00640-6.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4515087","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":"Assessment of the FAIRness of the Virtual Atomic and Molecular Data Centre following the Research Data Alliance evaluation framework","authors":"Carlo Maria Zwölf,&nbsp;Nicolas Moreau","doi":"10.1140/epjd/s10053-023-00649-x","DOIUrl":"10.1140/epjd/s10053-023-00649-x","url":null,"abstract":"<p>In this paper, we present the result of the analysis made on the Virtual Atomic and Molecular Data Centre infrastructure, following the FAIR Data Maturity Model framework defined by the Research Data Alliance. After recalling the technical architecture of the VAMDC e-infrastructure (Sect. 1.1), we will introduce the RDA FAIR evaluation framework (Sect. 2) and define the methodology we adopt to perform our analysis (Sect. 2.1). In Sect. 2.2, we will present the result of this analysis (the fine-grained granularity analysis from which Sect. 2.2 is discussed in “Appendix A”). After having identified some lines of work aimed at improving the FAIRness of VAMDC (Sect. 3), we will conclude with some ideas for further developments of this work (Sect. 4).</p>","PeriodicalId":789,"journal":{"name":"The European Physical Journal D","volume":"77 5","pages":""},"PeriodicalIF":1.8,"publicationDate":"2023-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epjd/s10053-023-00649-x.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4096732","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":"Triple-band terahertz metamaterial absorber with enhanced sensing capabilities","authors":"Shahzad Anwar,&nbsp;Qasim Khan,&nbsp;Ghafar Ali,&nbsp;Maaz Khan,&nbsp;Muhammad Maqbool","doi":"10.1140/epjd/s10053-023-00658-w","DOIUrl":"10.1140/epjd/s10053-023-00658-w","url":null,"abstract":"<div><p>A triple-band perfect metamaterial absorber was achieved in terahertz regime that is made of asymmetric metallic I-shaped resonator and metallic ground layer with dielectric spacer in the middle. The simulated results show that the absorption device has three resonance modes at frequencies 1.655 THz, 1.985 THz and 2.86 THz with corresponding absorption rate closed to 95%. The origin of the triple-band absorber was investigated by electromagnetic field energy distribution. The absorption performance was further analyzed by the structural parameters to verify the underlying mechanisms of these absorption triple-band. Moreover, we also analyze the sensing performances of the absorber for the refractive index and the thickness of the analyte. Two conventional parameters, the sensitivity and figure of merit (FOM), were used to analyze the proposed design for the sensing performance of the device. The refractive index and thickness sensitivities of sensor are 1.2 THz/RIU and 0.0055 THz/µm, and the FOMs are 24.48 and 0.112 which is higher in magnitude compared to the first two resonant peaks and even higher than the resonance peaks of the previously reported works in terahertz regime. The proposed design has a number of applications in sensing, filter and stealth technology.</p><h3>Graphical abstract</h3>\u0000 <figure><div><div><div><picture><source><img></source></picture></div></div></div></figure>\u0000 </div>","PeriodicalId":789,"journal":{"name":"The European Physical Journal D","volume":"77 4","pages":""},"PeriodicalIF":1.8,"publicationDate":"2023-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epjd/s10053-023-00658-w.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"5101960","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":"Photonic crystal fiber-based plasmonic sensor with ITO for medical applications","authors":"Pibin Bing,&nbsp;Jiangfei Zhao,&nbsp;Qing Liu,&nbsp;Xiaohu Yi,&nbsp;Zhongyang Li,&nbsp;Hongtao Zhang,&nbsp;Zhiliang Chen,&nbsp;Juan Xu","doi":"10.1140/epjd/s10053-023-00655-z","DOIUrl":"10.1140/epjd/s10053-023-00655-z","url":null,"abstract":"<div><p>In this paper, a photonic crystal fiber sensor is proposed for urine analysis of diabetic patients. Indium tin oxide (ITO) is adopted as plasmonic material to be coated on the polished plane to ensure a high flatness of the coating. The sensor is immersed in the liquid analyte for detection. Since the refractive index of the abnormal analyte is different from that of the normal level analyte, the change of its refractive index can be determined by comparing and analyzing the shifts of confinement loss peak shift. Simulation results show that the maximum wavelength sensitivity and resolution are 25,000 nm/RIU and 4 × 10⁻⁶ RIU in the refractive index detection range of 1.320–1.355. In addition, the sensor proposed in this paper can change the detection range and sensitivity by changing the thickness of ITO film, which means the thickness of ITO film can be optimized according to the application requirements to achieve customized PCF sensor. To sum up, the sensor proposed in this paper has potential applications in medical and chemical fields.\u0000</p><h3>Graphical abstract</h3>\u0000 <figure><div><div><div><picture><source><img></source></picture></div></div></div></figure>\u0000 </div>","PeriodicalId":789,"journal":{"name":"The European Physical Journal D","volume":"77 4","pages":""},"PeriodicalIF":1.8,"publicationDate":"2023-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"5065578","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":"Toward XUV frequency comb spectroscopy of the 1 S–2 S transition in (hbox {He}^+)","authors":"Jorge Moreno,&nbsp;Fabian Schmid,&nbsp;Johannes Weitenberg,&nbsp;Savely G. Karshenboim,&nbsp;Theodor W. Hänsch,&nbsp;Thomas Udem,&nbsp;Akira Ozawa","doi":"10.1140/epjd/s10053-023-00645-1","DOIUrl":"10.1140/epjd/s10053-023-00645-1","url":null,"abstract":"<p>The energy levels of hydrogen-like atoms and ions are accurately described by bound-state quantum electrodynamics (QED). <span>(hbox {He}^{+})</span> ions have a doubly charged nucleus, which enhances the higher-order QED contributions and makes them interesting for precise tests of QED. Systematic effects that currently dominate the uncertainty in hydrogen spectroscopy, such as the second-order Doppler shift and time-of-flight broadening, are largely suppressed by performing spectroscopy on trapped and cooled <span>(hbox {He}^{+})</span> ions. Measuring a transition in <span>(hbox {He}^{+})</span> will extend the test of QED beyond the long-studied hydrogen. In this article, we describe our progress toward precision spectroscopy of the 1 S–2 S two-photon transition in <span>(hbox {He}^{+})</span>. The transition can be excited by radiation at a wavelength of 60.8 nm generated by a high-power infrared frequency comb using high-order harmonic generation (HHG). The <span>(hbox {He}^{+})</span> ions are trapped in a Paul trap and sympathetically cooled with laser-cooled <span>(hbox {Be}^{+})</span> ions. Our recently developed signal detection scheme based on secular-scan spectrometry is capable of detecting <span>(hbox {He}^{+})</span> excitation with single-event sensitivity.</p>","PeriodicalId":789,"journal":{"name":"The European Physical Journal D","volume":"77 4","pages":""},"PeriodicalIF":1.8,"publicationDate":"2023-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epjd/s10053-023-00645-1.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4919171","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":"Update of Muonium 1S–2S transition frequency","authors":"Irene Cortinovis,&nbsp;Ben Ohayon,&nbsp;Lucas de Sousa Borges,&nbsp;Gianluca Janka,&nbsp;Artem Golovizin,&nbsp;Nikita Zhadnov,&nbsp;Paolo Crivelli","doi":"10.1140/epjd/s10053-023-00639-z","DOIUrl":"10.1140/epjd/s10053-023-00639-z","url":null,"abstract":"<p>We present an updated value of the Muonium 1<i>S</i>–2<i>S</i> transition frequency, highlighting contributions from different QED corrections as well as the large uncertainty in the Dirac contribution, stemming from the uncertainty of the electron to muon mass ratio. Improving the measurement of this spectral line would allow to extract a more accurate determination of fundamental constants, such as the electron to muon mass ratio or, combined with the Muonium hyperfine splitting, an independent value of the Rydberg constant. Furthermore, we report on the current status of the Mu-MASS experiment, which aims at measuring the Muonium 1<i>S</i>–2<i>S</i> transition frequency at a <span>(10hbox {kHz})</span> uncertainty level.</p>","PeriodicalId":789,"journal":{"name":"The European Physical Journal D","volume":"77 4","pages":""},"PeriodicalIF":1.8,"publicationDate":"2023-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epjd/s10053-023-00639-z.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4738280","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":"The selective role of the orbital angular momentum on the reaction stereo-dynamics","authors":"Stefano Falcinelli,&nbsp;Marco Parriani,&nbsp;Franco Vecchiocattivi,&nbsp;Fernando Pirani","doi":"10.1140/epjd/s10053-023-00643-3","DOIUrl":"10.1140/epjd/s10053-023-00643-3","url":null,"abstract":"<div><p>This paper reports on the characterization of the stereo-dynamic controlling three different chemi-ionization reactions, recent objective of our study, since they participate to the balance of phenomena occurring in plasma, interstellar medium, planetary atmospheres, flames and lasers. The optical potential, obtained by a phenomenological method and defined in the whole space of the relative configurations of reagents, has been formulated in an accurate and internally consistent way for three different systems. Some cuts of the multidimensional potential, that asymptotically correlate with a specific fine level of the open shell atom and/or with a defined orientation of the molecular reagent, have been exploited in the present study to emphasize crucial features of the collision dynamics along selected entrance channels of the reactions. Consistently, basic quantities determining the topology of the reaction stereo-dynamics have been properly defined, emphasizing in the three cases relevant changes in the microscopic reaction evolution. Much attention focused on the selectivity of the orbital angular momentum, affecting each collision event at any chosen collision energy. It controls the relative weight of two different reaction mechanisms. The direct reaction mechanism is driven by short-range chemical forces, promoting, by direct electron transfer between reagents, a prototypical elementary oxidation reaction. The indirect mechanism, controlled by the combination of long-range chemical and physical forces, can be triggered by a virtual photon exchanged between reagents, promoting a sort of photo-ionization process. Obtained results and emphasized differences appear to be of general interest for many other elementary processes, more difficult to characterize at this level of detail.</p><h3>Graphic abstract</h3>\u0000 <figure><div><div><div><picture><source><img></source></picture></div></div></div></figure>\u0000 </div>","PeriodicalId":789,"journal":{"name":"The European Physical Journal D","volume":"77 4","pages":""},"PeriodicalIF":1.8,"publicationDate":"2023-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epjd/s10053-023-00643-3.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4707823","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":"Effects of cold plasma treatment on growth enhancement and on the chemical composition of sweet basil plants (Ocimum basilicum)","authors":"Sauvelson Auguste,&nbsp;Gerald J. Buonopane,&nbsp;Setrak Tanielyan,&nbsp;Daniel E. Guerrero,&nbsp;Jose L. Lopez","doi":"10.1140/epjd/s10053-023-00633-5","DOIUrl":"10.1140/epjd/s10053-023-00633-5","url":null,"abstract":"<div><p>The current report is a continuation of our ongoing studies on the effect of cold plasma treatment on the physical and the biochemical properties of the <i>Ocimum basilicum</i> (sweet basil). Our previous work in this area revealed an enhanced growth effect by plasma treatment as well as higher levels of antioxidant components present in the essential oil extracts recovered from the plasma-treated plants. In the present study, the sweet basil was grown from seeds under controlled conditions with the plants separated into four groups. The first Group A (GA) is a control group where no plasma treatment was applied. In the second Group B (GB), the cold plasma treatment was applied to the seeds only. For Group C (GC-1X) and Group D (GD-2X), in addition to the seed treatment, the growing plants in these two groups received an additional body treatment, which was applied once (for Group C) and twice (for Group D) (weekly), following a standard treatment protocol. The total growing period was 14 weeks at which point the plants were harvested. Results revealed that the plants treated with plasma showed increased growth in their leaves and stems particularly in the later stages of vegetation. The essential oils from the sweet basil were recovered by Soxhlet extraction, and their composition was analyzed quantitatively by GC-FID and GC–MS. The extracts of the essential oil both in the control and plasma-treated plant groups showed five major components: eucalyptol, linalool, estragole, eugenol, and methyl cinnamate. Estragole was found to be in the highest concentration in the leaves, while linalool was the dominant product in the flowers, followed by estragole, eugenol, eucalyptol, and methyl cinnamate. In general, plasma treatment resulted in a significant increase in the concentration of both the estragole and linalool in the leaves, while lower concentrations of these two components were registered in the flowers for the plasma-treated groups.</p><h3>Graphical abstract</h3>\u0000 <figure><div><div><div><picture><source><img></source></picture></div></div></div></figure>\u0000 </div>","PeriodicalId":789,"journal":{"name":"The European Physical Journal D","volume":"77 4","pages":""},"PeriodicalIF":1.8,"publicationDate":"2023-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4668271","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":"Quantum statistics and blockade of phonon and photon in a dissipative quadratically coupled optomechanical system","authors":"M. Rafeie,&nbsp;M. K. Tavassoly","doi":"10.1140/epjd/s10053-023-00644-2","DOIUrl":"10.1140/epjd/s10053-023-00644-2","url":null,"abstract":"<p>There exists a tight relation between single-phonon and -photon source devices with the phonon and photon blockade implementations. These sources possess significant practical applications in quantum information processing and engineering. In this paper, we present a scheme to investigate the quantum statistics, as well as the phonon and photon blockade phenomena in an optomechanical system with quadratic coupling whose cavity has a moving membrane that is placed in the node (or antinode) of the optomechanical cavity. Strong nonlinear interaction between the optical and mechanical modes is induced by a driving field through radiation pressure. Also, the effective coupling strength can be adjusted by controlling the amplitude of an external pump field. Using the obtained effective Hamiltonian, we examine the steady state equal-time second-order correlation function via solving the Lindblad master equation which includes optical and mechanical dissipation sources. Our numerical results show that, with suitable adjustment of the system feasible parameters, we can achieve sub-Poissonian behavior, and as a result, an acceptable degree of phonon blockade. While using the same parameters, for the photon blockade, we arrive at a moderate or even weakly degree of the blockade. It should be emphasized that, as is shown, it is possible to make the scenario vice versa. By this, we mean that one can use a set of parameters by which a high (low) degree of photon (phonon) blockade is occurred. Moreover, we present a set of parameters for an optimal simultaneous occurrence of moderate phonon and photon blockade.</p>","PeriodicalId":789,"journal":{"name":"The European Physical Journal D","volume":"77 4","pages":""},"PeriodicalIF":1.8,"publicationDate":"2023-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4638340","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}