检索结果-南通市图书馆

XFEL and HHG interaction with matter:Effects of ultrashort pulses and random spikes

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Matter and Radiation at Extremes 2021年第3期6卷 1-7页

作者： F.B.Rosmej v.a.astapenko E.S.Khramov Sorbonne University Faculty of Science and EngineeringUMR 7605Case 1284 Place JussieuF-75252 Paris Cedex 05France LULI Ecole PolytechniqueCEACNRSLaboratoire pour l’Utilisation des Lasers IntensesPhysique Atomique dans les Plasmas DensesF-91128 PalaiseauFrance Moscow Institute of Physics and Technology-MIPT Institutskii per.9Dolgoprudnyi 141700Russia National Research Nuclear University MEPhI(Moscow Engineering Physics Institute) Kashirskoe sh.31Moscow 115409Russia

The theory of photoionization describing the interaction of x-ray free-electron laser(XFEL)pulses and high-harmonic-generated(HHG)radiation is generalized to ultrashort laser pulses,where the concept of the standard ionization probability per unit time in Fermi’s golden rule and in Einstein’s theory breaks *** calculations carried out in terms of a generalized photoionization probability for the total duration of pulses in the near-threshold regime demonstrate essentially nonlinear behavior,while absolute values may change by orders of magnitude for typical XFEL and HHG *** self-amplified spontaneous emission pulses are analyzed to reveal general features of photoionization for random and regular spikes:the dependences of the nonlinear photoionization probability on carrier frequency and spike duration are very similar,allowing an analytical expectation value approach that is valid even when there is only limited knowledge of random and regular *** simulations carried out for typical parameters demonstrate excellent agreement.

关键词： random interaction nonlinear

Scattering of ultrashort laser pulses on plasmons in a Maxwellian plasma

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Matter and Radiation at Extremes 2021年第5期6卷 31-38页

作者： v.a.astapenko F.B.Rosmej E.S.Khramov Moscow Institute of Physics and Technology(National Research University) Institutskii per.9141701 DolgoprudnyRussia Sorbonne University Faculty of Science and EngineeringUMR 7605Case 1284 Place JussieuF-75252 Paris Cedex 05France LULI Ecole PolytechniqueCEACNRSLaboratoire pour l’Utilisation des Lasers IntensesPhysique Atomique dans les Plasmas DensesF-91128 PalaiseauFrance National Research Nuclear University MEPhI(Moscow Engineering Physics Institute) Kashirskoe sh.31115409 MoscowRussia

On the basis of equations obtained in the framework of second-order quantum-mechanical perturbation theory,the standard approach to the calculation of scattering radiation probability is extended to the case of ultrashort laser *** the mechanism of the appearance of plasmon peaks in the spectrum of the plasma form factor for different parameters of the *** the case in which scattering on plasmons dominates over scattering on electron density fluctuations caused by chaotic thermal motion,we derive analytical expressions describing the scattering probability of ultrashort laser pulses on *** with this,we obtain a simple expression connecting the frequency of scattered radiation and the energy transmitted from the incident pulse to plasmon,and vice *** considering the scattering probability,our emphasis is on the dependence on the pulse *** in detail the trends of this dependence for various relations between pulse carrier frequency and plasmon energy.

关键词： scattering ultrashort laser

Dielectronic recombination in non-LTE plasmas

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Matter and Radiation at Extremes 2020年第6期5卷 1-20页

作者： F.B.Rosmej v.a.astapenko v.S.Lisitsa L.A.vainshtein Sorbonne University Faculty of Science and EngineeringUMR 7605Case 1284 Place JussieuF-75252 Paris Cedex 05France LULI Ecole PolytechniqueCNRS-CEAPhysique Atomique dans les Plasmas Denses(PAPD)Route de SaclayF-91128 Palaiseau CedexFrance Moscow Institute of Physics and Technology MIPT(National Research University) Dolgoprudnyi 141700Russia National Research Nuclear University-MEPhI Department of Plasma PhysicsMoscow 115409Russia National Research Center“Kurchatov Institute” MoscowRussia P.N.Lebedev Physical Institute of the Russian Academy of Sciences Moscow 119991Russia

Novel phenomena andmethods related to dielectronic capture and dielectronic recombination are studied for non-local thermodynamic equilibrium(LTE)plasmas and for applications to non-LTE ionization *** is demonstrated thatmultichannel autoionization and radiative decay strongly suppress higher-order contributions to the total dielectronic recombination rates,which are overestimated by standard approaches by orders of ***-state coupling of dielectronic capture is shown to be much more important than ground-state contributions,and electron collisional excitation is also identified as a mechanism driving effective dielectronic recombination.A theoretical description of the effect of angularmomentum-changing collisions on dielectronic recombination is developed from an atomic kinetic point of view and is visualized with a simple analytical *** perturbation of the autoionizing states due to electric fields is discussed with respect to ionization potential depression and perturbation of symmetry properties of autoionizationmatrix *** first steps in the development of statistical methods are presented and are realized in the framework of a local plasma frequency ***,the impact of collisional–radiative processes and atomic population kinetics on dielectronic recombination is critically discussed,and simple analytical formulas are presented.

关键词： radiative perturbation kinetics

Statistical and quantum photoionization cross sections in plasmas:Analytical approaches for any configurations including inner shells

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Matter and Radiation at Extremes 2020年第6期5卷 21-35页

作者： F.B.Rosmej L.A.vainshtein v.a.astapenko v.S.Lisitsa Sorbonne University Faculty of Science and EngineeringUMR 7605case 1284 Place JussieuF-75252 Paris Cedex 05France LULI Ecole PolytechniqueCNRS-CEAPhysique Atomique dans les Plasmas Denses(PAPD)Route de SaclayF-91128 Palaiseau CedexFrance Moscow Institute of Physics and Technology MIPT(National Research University) Dolgoprudnyi 141700Russia National Research Nuclear University-MEPhI Department of Plasma PhysicsMoscow 115409Russia P.N.Lebedev Physical Institute of the Russian Academy of Sciences Moscow 119991Russia National Research Center“Kurchatov Institute” MoscowRussia

Statistical models combined with the local plasma frequency approach applied to the atomic electron density are employed to study the photoionization cross-section for complex *** is demonstrated that the Thomas–Fermi atom provides surprisingly good overall agreement even for complex outer-shell configurations,where quantum mechanical approaches that include electron correlations are exceedingly *** mechanical photoionization calculations are studied with respect to energy and nl quantum number for hydrogen-like and non-hydrogen-like atoms and *** scaled photoionizationmodel(GSPM)based on the simultaneous introduction of effective charges for non-H-like energies and scaling charges for the reduced energy scale allows the development of analytical formulas for all states *** expressions for nl1s,2s,2p,3s,3p,3d,4s,4p,4d,4f,and 5s are *** to H-like and non-H-like atoms and ions and to neutral atoms demonstrates the universality of the scaled analytical approach including inner-shell ***,GSPMdescribes the near-threshold behavior and high-energy asymptotes ***,we discuss the various models and the correspondence principle along with experimental data and with respect to a good compromise between generality and *** results are also relevant to large-scale integrated light–matter interaction simulations,e.g.,X-ray free-electron laser interactions with matter or photoionization driven by a broadband radiation field such as Planckian radiation.

关键词： quantum photoionization configuration

B-L model with D_(4)×Z_(4)×Z_(2)symmetry for fermion mass hierarchies and mixings

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Physics C 2024年第6期48卷 11-30页

作者： v.v.vien Department of Physics Tay Nguyen UniversityDaklakVietnam

We constructed a gauge B-L model with D_(4)×Z_(4)×Z_(2)symmetry to explain the quark and lepton mass hierarchies and their mixings with realistic CP phases via the type-I seesaw *** quark mases,three quark mixing angles,and the CP phase in the quark sector take the central values whereas Yukawa couplings in the quark sector are diluted in a range of difference of three orders of magnitude by the perturbation theory at the first *** the neutrino sector,a small neutrino mass is achieved by the type-I seesaw *** inverted and normal neutrino mass hierarchies are consistent with the experimental *** predicted sum of neutrino masses for normal and inverted hierarchies,the effective neutrino masses,and the Dirac CP phase are also consistent with recently reported limits.

关键词： flavor symmetries quark and lepton masses and mixing extensions of electroweak gauge sector neutrino mass and mixing non-standard-model neutrinos right-handed neutrinos D4 discrete symmetry

Active and passive modulation of solar light transmittance in a uniquely multifunctional dual-band single molecule for smart window applications

在线全文

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2024年第1期88卷 293-305,I0007页

作者： Pooja v.Chavan Pramod v.Rathod Joohyung Lee Sergei v.Kostjuk Hern Kim Department of Energy Science and Technology Environmental Waste Recycle InstituteMyongji UniversityYonginGyeonggi-do 17058Republic of Korea Department of Chemical Engineering Myongji UniversityYonginGyeonggi-do 17058Republic of Korea Research Institute for Physical Chemical Problems of the Belarusian State University MinskBelarus

Functional materials may change color by heat and electricity separately or simultaneously in smart *** materials have not only demonstrated remarkable potential in the modulation of solar radiation but are also leading to the development of indoor environments that are more comfortable and conducive to improving individuals'quality of ***,dual-responsive materials have not received ample research attention due to economic and technological *** a consequence,the broader utilization of smart windows faces *** address this new generational multistimulus responsive chromic materials,our group has adopted a developmental strategy to create a poly(NIPAM)n-Hv as a switchable material by anchoring active viologen(Hv)onto a phase-changing poly(NIPAM)n-based smart material for better utility and *** constructed smart windows facilitate individualistic reversible switching,from a highly transparent state to an opaque state(thermochromic)and a red state(electrochromic),as well as facilitate a simultaneous dual-stimuli response reversible switching from a clear transparent state to a fully opaque(thermochromic)and orange(electrochromic)*** privacy can be attained in smart windows designed for exclusive settings by achieving zero *** unique chromic mode operates independently and modulates visible and near-infrared(NIR)light in a distinct ***,these smart windows with thermal and electric dual-stimuli responsiveness demonstrate remarkable heat regulation capabilities,rendering them highly attractive for applications in building facades,energy harvesting,privacy protection,and color display.

关键词： Smart windows Thermochromism Electrochromism Energy saving Dual-responsive material

Unravelling-based (auto)control of back-action in atomic Bose–Einstein condensate

在线全文

学校读者我要写书评

暂无评论

Frontiers of physics 2024年第4期19卷 287-295页

作者： v.A.Tomilin L.v.Il’ichov Institute of Automation and Electrometry SB RAS 630090 NovosibirskRussia

We present a novel feedback control method for quantum *** does not affect the controlled system ***,it controls the unravelling of the quantum channel of interaction between the system and its *** interaction can be represented as a history of *** their informational content is changed,their back-action on the system is also *** action is trigged by the events,thus granting the system the degree of control over its own *** efficiency of the proposed scheme is demonstrated on the example of two-mode atomic Bose-Einstein condensate,with one of its modes subject to phase-contrast imaging in a Mach–Zehnder *** histories of photocounts in the output channels of the interferometer are used for *** capabilities of state engineering are studied for different settings of the feedback loop and different numbers of events in the recorded histories.

关键词： quantum feedback control quantum measurements twomode Bose-Einstein condensates

Photoluminescence,structural and antibacterial properties of co-dopedβ-Ca_(3)(PO_(4))_(2)-type phosphates Ca_(8)CuRE(PO_(4))_(7)(RE=Eu-Er)

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Rare Earths 2024年第9期42卷 1658-1668,I0002页

作者： Ivan v.Nikiforov Ekaterina v.Iliin Bogdan I.Lazoryak Sergey M.Aksenov Pavel v.Slukin Dina v.Deyneko Department of Chemistry Lomonosov Moscow State University119991MoscowRussia Laboratory of Arctic Mineralogy and Material Sciences Kola Science CentreRussian Academy of Sciences184209ApatityRussia Geological Institute Kola Science CentreRussian Academy of Sciences184209ApatityRussia State Scientific Center of Applied Microbiology and Biotechnology of Rospotrebnadzor 24 Block A142279ObolenskRussia

Novel Ca_(8)CuRE(PO_(4))_(7)where RE^(3+)=Eu^(3+),Tb^(3+),Dy^(3+),Ho^(3+)and Er^(3+)were synthesized by a solid-state method in *** structures of the samples were characterized by powder X-ray diffraction using Rietveld refinement to determine the occupation of crystal *** samples are found to have a centrosymmetric structure with space group R3c,as shown by dielectric *** synthesized Ca_(8)CuRE(PO_(4))_(7)samples have multifunctional *** Cu^(2+)ions provide antibacterial properties,while the rare earth elements ions exhibit luminescence properties,and theβ-Ca_3(PO_(4))_(2)-type host is *** photoluminescence properties of RE^(3+)ions were studied and compared with other simmilar Ca_(8)MRE(PO_(4))_(7)phosphates,where M is a divalent *** photoluminescence intensity quenching in terms of energy transfer from RE^(3+)to Cu^(2+)is *** bioactive properties were studied in relation to antibacterial activity against *** and *** syntesized Ca_(8)CuRE(PO_(4))_(7)samples demonstrate very high and stable inhibition of bacteria *** correlation between crystal structure and properties is *** combining multiple approaches to the directio nal design of such materials,several important properties within a single chemical compound to achieve biovisualization and bioactive properties simultaneously can be combined.

关键词： β-Ca_(3)(PO_(4))_(2) Whitlockite-type structure Bioactive phosphates TCP Photoluminescence Rare earths

The Radcliffe Wave Parameters from Data on Open Star Clusters

在线全文

学校读者我要写书评

暂无评论

Research in Astronomy and Astrophysics 2024年第3期24卷 106-109页

作者： v.v.Bobylev A.T.Bajkova Pulkovo Astronomical Observatory St-Petersburg 196140Russia

A spectral analysis of the vertical positions and velocities of 374 open star clusters(OSCs)was carried *** took these OSCs from the Hunt and Reffert catalog;they have an average age of about 10 million years,and are located on the galactic plane XY in a narrow zone inclined by 25°to the galactic axis *** following estimates of the parameters of the Radcliffe wave were obtained:(a)the maximum value in periodic perturbations of vertical coordinates Z_(max)=92±10pc with the wavelength of these perturbations λ_(z)=4.82±0.09 kpc;(b)the maximum value of the velocity of vertical disturbances Wmax=4.36±0.12km s^(-1) with disturbance wavelengthλ_(W)=1.78±0.02 *** that the results of the vertical velocity analysis are first-class in accuracy and completely new.

关键词： (Galaxy) local interstellar matter-Galaxy structure-(Galaxy) solar neighborhood