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Electron and positron interactions and their applications: a tribute to Professor Michael Brunger
IF 1.5 4区 物理与天体物理
The European Physical Journal D Pub Date : 2025-03-03 DOI: 10.1140/epjd/s10053-025-00954-7
Márcio H. F. Bettega, Stephen J. Buckman, Dragana Marić, Sylwia Ptasinska, Ron D. White
{"title":"Electron and positron interactions and their applications: a tribute to Professor Michael Brunger","authors":"Márcio H. F. Bettega, Stephen J. Buckman, Dragana Marić, Sylwia Ptasinska, Ron D. White","doi":"10.1140/epjd/s10053-025-00954-7","DOIUrl":"10.1140/epjd/s10053-025-00954-7","url":null,"abstract":"","PeriodicalId":789,"journal":{"name":"The European Physical Journal D","volume":"79 3","pages":""},"PeriodicalIF":1.5,"publicationDate":"2025-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143533055","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}
引用次数: 0
Delayed photofission of dianionic tin clusters
IF 1.5 4区 物理与天体物理
The European Physical Journal D Pub Date : 2025-02-20 DOI: 10.1140/epjd/s10053-025-00965-4
Alexander Jankowski, Paul Fischer, Moritz Grunwald-Delitz, Lutz Schweikhard
{"title":"Delayed photofission of dianionic tin clusters","authors":"Alexander Jankowski,&nbsp;Paul Fischer,&nbsp;Moritz Grunwald-Delitz,&nbsp;Lutz Schweikhard","doi":"10.1140/epjd/s10053-025-00965-4","DOIUrl":"10.1140/epjd/s10053-025-00965-4","url":null,"abstract":"<p>Dianionic tin clusters <span>(textrm{Sn}_{34}^{2-})</span> stored in a Penning trap are excited by nanosecond laser pulses with photon energies ranging from 2.0 to <span>(4.7,textrm{eV})</span>, resulting in delayed decays. Time-resolved measurements with varying delays between laser irradiation and fragment analysis from a few ten microseconds to a second reveal matching exponential appearance constants of several singly charged dissociation products. This indicates that the dianions undergo fission into competing pairs of <span>(textrm{Sn}_{10}^{-})</span> + <span>(textrm{Sn}_{24}^{-})</span> and <span>(textrm{Sn}_{15}^{-})</span> + <span>(textrm{Sn}_{19}^{-})</span>. Furthermore, matching decay constants for high photon energies of twice the low-energy values indicate that the decay observed at the low energies results from two-photon excitation.The delayed photodecay of dianionic tin clusters shows competing dissociation pathways by fission into two singly charged product clusters. Further sequential decay processes are investigated.</p>","PeriodicalId":789,"journal":{"name":"The European Physical Journal D","volume":"79 2","pages":""},"PeriodicalIF":1.5,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epjd/s10053-025-00965-4.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143455405","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}
引用次数: 0
On matrix elements of the vector physical quantities
IF 1.5 4区 物理与天体物理
The European Physical Journal D Pub Date : 2025-02-14 DOI: 10.1140/epjd/s10053-025-00966-3
Alexei M. Frolov
{"title":"On matrix elements of the vector physical quantities","authors":"Alexei M. Frolov","doi":"10.1140/epjd/s10053-025-00966-3","DOIUrl":"10.1140/epjd/s10053-025-00966-3","url":null,"abstract":"<p>Methods of angular momenta are modified and used to solve some actual problems in quantum mechanics. In particular, we re-derive some known formulas for analytical and numerical calculations of matrix elements of the vector physical quantities. These formulas are applied to a large number of quantum systems which have an explicit spherical symmetry. Multiple commutators of different powers of the angular momenta <span>({hat{textbf{J}}}^{2})</span> and vector-operator <span>({hat{textbf{A}}})</span> are determined in the general form. Calculations of the expectation values averaged over orbital angular momenta are also described in detail. This effective and elegant old technique, which was successfully used by Enrico Fermi and Aage Bohr, is almost forgotten in modern times. We also discuss quantum systems with additional relations (or constraints) between some vector-operators and orbital angular momentum. For similar systems such relations allow one to obtain some valuable additional information about their properties, including the bound state spectra, correct asymptotics of actual wave functions, etc. As an example of unsolved problems we consider applications of the algebras of angular momenta to investigation of the one-electron, two-center (Coulomb) problem <span>((Q_1, Q_2))</span>. For this problem it is possible to obtain the closed analytical solutions which are written as the ‘correct’ linear combinations of products of the two one-electron wave functions of the hydrogen-like ions with the nuclear charges <span>(Q_1 + Q_2)</span> and <span>(Q_1 - Q_2)</span>, respectively. However, in contrast with the usual hydrogen-like ions such hydrogenic wave functions must be constructed in three-dimensional pseudo-Euclidean space with the metric (<span>(-1,-1,1)</span>).</p>","PeriodicalId":789,"journal":{"name":"The European Physical Journal D","volume":"79 2","pages":""},"PeriodicalIF":1.5,"publicationDate":"2025-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143423231","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}
引用次数: 0
Plasma screening effects on the above-threshold ionization spectra of argon atom in an intense laser field
IF 1.5 4区 物理与天体物理
The European Physical Journal D Pub Date : 2025-02-12 DOI: 10.1140/epjd/s10053-025-00962-7
Ashish Sharma, Manisha Tyagi, Man Mohan, Alok Kumar Singh Jha
{"title":"Plasma screening effects on the above-threshold ionization spectra of argon atom in an intense laser field","authors":"Ashish Sharma,&nbsp;Manisha Tyagi,&nbsp;Man Mohan,&nbsp;Alok Kumar Singh Jha","doi":"10.1140/epjd/s10053-025-00962-7","DOIUrl":"10.1140/epjd/s10053-025-00962-7","url":null,"abstract":"<p>Plasma screening effects on the above-threshold ionization (ATI) of the argon atom in Gaussian windowed soft-core Coulomb (GSC) potential is investigated using the time-dependent Schrödinger equation (TDSE), by employing the Crank–Nicolson numerical method. The variation in the ground-state population and ionization probabilities with time is calculated in the Debye plasma environment. The effect of laser intensity variations on the ATI spectra of argon atom is calculated, and ATI spectra show a similar pattern of redshift, as discussed in the available literature. Plasma screening effects on the population of ground state, ionization probabilities, and ATI spectra of argon atom are studied in GSC potential for the first time, at different laser intensities and Debye lengths.</p>","PeriodicalId":789,"journal":{"name":"The European Physical Journal D","volume":"79 2","pages":""},"PeriodicalIF":1.5,"publicationDate":"2025-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143396624","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}
引用次数: 0
Maximal secret reconstruction, teleportation and Bell’s inequality
IF 1.5 4区 物理与天体物理
The European Physical Journal D Pub Date : 2025-02-05 DOI: 10.1140/epjd/s10053-025-00955-6
Pratishtha Abrol, Pahulpreet Singh, Indranil Chakrabarty
{"title":"Maximal secret reconstruction, teleportation and Bell’s inequality","authors":"Pratishtha Abrol,&nbsp;Pahulpreet Singh,&nbsp;Indranil Chakrabarty","doi":"10.1140/epjd/s10053-025-00955-6","DOIUrl":"10.1140/epjd/s10053-025-00955-6","url":null,"abstract":"<p>A tripartite state is said to be a potential resource for secret sharing if in addition to being useful for the secret reconstruction (Singh and Chakrabarty in: Phys Rev A 109(3):032406, 2024), it imposes restrictions on the teleportation fidelity of the bipartite channels associated with three-qubit states (dealer–reconstructor and dealer–assistant channels). It is important to ask the question: for a given class of states satisfying some constraint, which secret sharing resources will have the maximum possible reconstruction fidelity? Here, we address this question for a pure three-qubit GHZ class of states (sometimes referred as Acin states) (Antonio Acín et al. in: J Phys A Math Gen 34(35):6725, 2001; Acín et al. in: Phys Rev Lett 87(4):040401, 2001). We are able to characterize the set of states with maximum possible reconstruction fidelity (called as maximal secret reconstructible state [<i>MSR</i>]). Here, the constraint in characterizing the states is a fixed value of the maximum of the teleportation fidelity of both the bipartite (dealer–receivers) channels. In that spirit our result paves the way in setting the practical information transfer limit in a possible resource theoretic extension of secret sharing. Similarly for a value giving the maximum of Bell-CHSH value of both bipartite channels (dealer–reconstructor and dealer–assistant), we are able to find the maximum achievable reconstruction fidelity. Interestingly, we find that all secret shareable states satisfy Bell’s inequality in both the channels (dealer–reconstructor and dealer–assistant partitions). This brings out a new mutual exclusivity between secret shareable state and Bell’s inequality violation.</p>","PeriodicalId":789,"journal":{"name":"The European Physical Journal D","volume":"79 2","pages":""},"PeriodicalIF":1.5,"publicationDate":"2025-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143184815","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}
引用次数: 0
Two-photon excited fluorescence with shaped laser pulses for refractive beams
IF 1.5 4区 物理与天体物理
The European Physical Journal D Pub Date : 2025-01-31 DOI: 10.1140/epjd/s10053-025-00953-8
S. S. A. S. Bukhari, R. Gottschalk, A. Lindinger
{"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}
引用次数: 0
Controlling atomic wave interference by counter-propagating light pulses of different carrier frequencies
IF 1.5 4区 物理与天体物理
The European Physical Journal D Pub Date : 2025-01-29 DOI: 10.1140/epjd/s10053-025-00956-5
Victor I. Romanenko, Nataliya V. Kornilovska, Leonid P. Yatsenko
{"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}
引用次数: 0
Electron-impact ionization TDCS of a nitrogen molecule using the DWBA and IAM-AR
IF 1.5 4区 物理与天体物理
The European Physical Journal D Pub Date : 2025-01-28 DOI: 10.1140/epjd/s10053-025-00957-4
D. Buljubasic, P. K. Kariuki, J. Okumu
{"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}
引用次数: 0
Eco-friendly fabrication of selenium oxide nanoparticles by low-temperature plasma technique and evaluation of their antimicrobial activity
IF 1.5 4区 物理与天体物理
The European Physical Journal D Pub Date : 2025-01-28 DOI: 10.1140/epjd/s10053-025-00952-9
Nisreen Kh. Abdalameer, Nadia Jasim Ghdeeb, Kawther A. Khalaph, Yasmine Taha
{"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}
引用次数: 0
Parametric representation, asymptotic and bifurcation analyses of the electronic plasma oscillations
IF 1.5 4区 物理与天体物理
The European Physical Journal D Pub Date : 2025-01-27 DOI: 10.1140/epjd/s10053-024-00949-w
Alexandr A. Barsuk, Florentin Paladi
{"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}
引用次数: 0
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