A5084045366- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Quantum Chromodynamics and Particle Interactions
- Advanced X-ray Imaging Techniques
- Particle Detector Development and Performance
- Dark Matter and Cosmic Phenomena
- Atomic and Molecular Physics
- Laser-Plasma Interactions and Diagnostics
- Laser Design and Applications
- X-ray Spectroscopy and Fluorescence Analysis
- Laser-Matter Interactions and Applications
- Laser-induced spectroscopy and plasma
- Crystallography and Radiation Phenomena
- Cosmology and Gravitation Theories
- Advanced Electron Microscopy Techniques and Applications
- X-ray Diffraction in Crystallography
- Advanced X-ray and CT Imaging
- Laser Material Processing Techniques
- Electron and X-Ray Spectroscopy Techniques
- Optical Coatings and Gratings
- Photonic and Optical Devices
- Photorefractive and Nonlinear Optics
- Nuclear Physics and Applications
- Neutrino Physics Research
- Medical Imaging Techniques and Applications
P.N. Lebedev Physical Institute of the Russian Academy of Sciences
2015-2024
National Academy of Sciences of Ukraine
2024
Center for Research and Advanced Studies of the National Polytechnic Institute
2024
Bose Institute
2024
A. Alikhanyan National Laboratory
2015-2024
Bogolyubov Institute for Theoretical Physics
2024
Chicago State University
2024
AGH University of Krakow
2024
Jagiellonian University
2024
California Polytechnic State University
2024
It is found that strong squeezing can be obtained by special superposition of coherent states along a straight line in the \ensuremath{\alpha} -plane. This mechanism opens new possibilities for squeezing, e.g., molecular vibrations during Franck-Condon transition induced short light pulse.
The possibility of making multilayer reflecting coatings by using materials whose dielectric susceptibility ∊ is very near to unity at the frequency under consideration discussed. For pair substances with a given Re∊ and Im∊ explicit expressions are obtained for value reflection coefficient optimum thickness layers. published data on allowed us choose pairs which one may hope create (in principle) mirrors normal incidence R ~ 50% λ ≳ 30 Å.
Radiative characteristics of a laser plasma are considered. It is shown that considerable proportion the absorbed energy may be converted into resonance lines multiply charged ions. Two methods for utilization x-ray radiation in population inversion two-component discussed. In one method, component dense core used selective pumping some level other outer rare region. second ions layer to photoionize inner core; this produces conditions analogous those supercooled and established. all cases,...
We have demonstrated near-wavelength resolution microscopy in the extreme ultraviolet. Images of 50 nm diameter nanotubes were obtained with a single ~1 ns duration pulse from desktop-size 46.9 laser. measured modulation transfer function microscope for three different numerical aperture zone plate objectives, demonstrating that 54 half-period structures can be resolved. The combination spatial and high temporal opens myriad opportunities imaging, such as ability to directly investigate...
The zeolitic imidazolate framework ZIF-8 (Zn(mim)2, mim = 2-methylimidazolate) has recently been proposed as a drug delivery platform for anticancer therapy based on its capability of decomposing in acidic media. concept presumes targeted release encapsulated molecules the vicinity tumor tissues that typically produce secretions with elevated acidity. Due to challenges vivo and vitro examination, many studies have addressed kinetics decomposition subsequent phosphate buffered saline (PBS)...
It is shown that a population inversion occurs for three types of transition in neon-like ions with Z~7–15 steady-state plasma. A gain ~100 cm–1 may be expected the 2p53p1S0→2p53S1P1 wavelength range λ~40–80nm. Radiation trapping by 2p6→2p53S and 2p6→2p53d transitions alters drastically gain.
A statistical theory of the dipole polarizability α is given for atoms and ions, described in Thomas-Fermi model. universal dependence ions on their radius constructed by numerical calculations. In case multiply-charged expression has a simple analytical form. The results computation are good agreement with available experimental theoretical data especially when outer electron shells more than half-filled.
Peptide-based nanostructures are very promising for nanotechnological applications because of their excellent self-assembly properties, biological and chemical flexibility, unique multifunctional performance. However, one the limiting factors integration peptide assemblies into functional devices is poor control alignment other geometrical parameters required device fabrication. In this work, we report a novel method controlled deposition representative self-assembled...
Sc-Si multilayers are suggested as high-reflectivity coatings for a VUV interval of 35-50 nm. Fabricated mirrors show normal-incidence reflectivity 30-54%, which is high enough effective manipulation the beams compact-discharge, laser-driven x-ray lasers. The values obtained not, however, limits coatings. Theoretical estimations well electron microscopy studies interfaces indicate large potential further increase in their reflectivity.
The theory of multilayer optics relevant to the following fields application is given: choice materials for efficient XUV reflectors, Obtainment high spectral resolution, Construction polarizers and collimators beams.
We focused the beam of a high-repetition-rate capillary-discharge tabletop laser operating at wavelength 46.9 nm, using spherical Si/Sc multilayer mirror. The energy densities significantly exceeded thresholds for ablation metals. Single-shot patterns were used in combination with ray-tracing computations to characterize beam. radiation intensity within 2?µm-diameter central region focal spot was estimated be ?1011 W/cm2, corresponding density ?100 J/cm2.
A new non-destructive method based on x-ray microtomography (micro-CT) was developed to measure calcium density in bone. X-ray micro-CT used as a quantitative approach acquire and reconstruct virtual cross-sections through the sample. Accurate beam-hardening correction implemented. Grey values were calibrated mineral From these cross-sections, three-dimensional models created.
The thermal stability of Mo–Si multilayers prepared by magnetron sputtering is studied. It found that degradation x-ray reflectivity under heat loading connected with the roughening interfaces and formation compounds MoxSiy. To avoid these mechanisms we fabricated tested MoSi2–Si loading. multilayer appeared to be much more stable both in period because thermodynamic equilibrium components MoSi2 Si at interface. working temperature reaches 1000 K.
Images with a spatial resolution of 120–150?nm were obtained 46.9?nm light from compact capillary-discharge laser by use the combination Sc–Si multilayer-coated Schwarzschild condenser and free-standing imaging zone plate. The results are relevant to development extreme-ultraviolet laser-based tools for nanoscience nanotechnology.
A radiative collisional model which allows for all the levels of 1s22s22p53s, 2p53p, and 2p53d configurations is used to calculate populations first excited states neon-like ions. An earlier conclusion that an inversion exists between lp 2p53p 2p53s in a stationary plasma confirmed. It shown with fairly high gain due not one but several types transitions covering wide wavelengths range.
The intercombination lines 1s3p 3P1 to 1s2 1S0 of the ions Mg XI, Al XII, P XIV, S XV and Cl XVI have been observed for first time in spectra laser-produced plasmas. wavelengths relative intensities such were measured. identification was carried out by means a comparison experimental with theoretical ones. dependence on plasma parameters investigated.
The progressive statistics of forest fires in the world makes them a global problem for humankind; therefore, issue controlling such natural disasters is extremely urgent. This paper describes application fine-dispersed alumina nanoparticles firefighting. Nanocolloids based on aluminum hydroxide are proposed as extinguishing compositions two purpose: fire prevention and suppression with barrier formation. Aluminum sulfate various hydrolyzing agents (ammonia solution or sodium bicarbonate)...