A5011865590- Atomic and Molecular Physics
- Laser-induced spectroscopy and plasma
- Advanced Chemical Physics Studies
- X-ray Spectroscopy and Fluorescence Analysis
- Plasma Diagnostics and Applications
- Nuclear physics research studies
- Electron and X-Ray Spectroscopy Techniques
- Particle accelerators and beam dynamics
- Mass Spectrometry Techniques and Applications
- Muon and positron interactions and applications
- Diamond and Carbon-based Materials Research
- Fullerene Chemistry and Applications
- Cold Atom Physics and Bose-Einstein Condensates
- High-pressure geophysics and materials
- Ion-surface interactions and analysis
- Grouting, Rheology, and Soil Mechanics
- Geotechnical Engineering and Underground Structures
- Advanced Frequency and Time Standards
- Spectroscopy and Laser Applications
- Radioactive element chemistry and processing
- Quantum, superfluid, helium dynamics
- Laser-Matter Interactions and Applications
- Atomic and Subatomic Physics Research
- Chemical Thermodynamics and Molecular Structure
- Astro and Planetary Science
Indian Institute of Technology Roorkee
2016-2025
Czech Academy of Sciences, J. Heyrovský Institute of Physical Chemistry
2023-2025
Chandigarh University
2023
Indian Institute of Technology Bombay
2018
Heidelberg University
2009-2012
York University
2012
GSI Helmholtz Centre for Heavy Ion Research
2010-2011
University of Botswana
2001
LXCat is an open‐access platform ( www.lxcat.net ) for curating data needed modeling the electron and ion components of technological plasmas. The types presently supported on are scattering cross sections swarm/transport parameters, ion‐neutral interaction potentials, optical oscillator strengths. Twenty‐four databases contributed by different groups around world can be accessed LXCat. New contributors welcome; database retain ownership responsible contents maintenance individual databases....
Fully relativistic distorted-wave theory has been applied to study the electron-impact excitation of ${\mathit{ns}}_{1/2}$-${\mathit{np}}_{1/2}$ and ${\mathit{ns}}_{1/2}$-${\mathit{np}}_{3/2}$ resonance transitions singly charged metal ions with one valence electron, viz., Mg${}^{+}$ ($n=3$), Ca${}^{+}$ ($n=4$), Zn${}^{+}$ Cd${}^{+}$ ($n=5$), Ba${}^{+}$ ($n=6$). Calculations are performed in range incident electron energies up 300 eV for differential integrated cross sections as well linear...
Our recently reported fully relativistic distorted-wave electron-impact cross sections from the ground and metastable states of argon to various excited fine-structure levels are incorporated in a collisional-radiative model obtain population densities for 3p54s 3p54p (1s 2p) manifolds low temperature plasmas. Excitation two J = 1 resonance levels, 1s2 1s4, higher lying 2p manifold as well transitions among individual 1s also calculated included present which were not considered any earlier...
Abstract Atomic cascades refer—first and foremost—to the stepwise de-excitation of excited atoms owing to emission electrons or photons. Apart from dedicated experiments at storage rings synchrotrons, such frequently occur in astro plasma physics, material research, surface science various places elsewhere. In addition, moreover, “atomic cascades” have been found a useful concept for modeling atomic behavior under different conditions, instance, when dealing with photoabsorption matter,...
We present a theoretical investigation of the inelastic scattering vortex electrons by many-electron atoms embedded in solid-state environment. Special emphasis is placed on probability exciting target atom and relative population its magnetic substates as described set alignment parameters. These parameters are directly related to angular distribution subsequent radiative decay. To demonstrate application developed approach, we calculations for 3s2 S01→3s3p P13 excitation Mg 3s3p P13→3s2...
Abstract We present a theoretical study of the inelastic scattering vortex electrons by hydrogen atom. In our study, special emphasis is placed on effects Coulomb interaction between projectile electron and target To understand these effects, we construct wave functions both from free space distorted solutions Schr"odinger equation. These give rise to first Born amplitudes, respectively. The derived theory has been employed investigate $1s \rightarrow 2p$ transition atom induced with kinetic...
Abstract Nanocrystalline LaCoO3 materials prepared by a spray-freeze freeze-drying approach in the presence of various amounts gelatine were tested oxygen electrocatalysis alkaline media. Gelatine reaction mixture affects distribution vacancies as well formation Ruddlesen–Popper (RP) defects within nanocrystals. Materials at low concentration (c 1.5g/L) tend to locate domain boundaries while increasing promotes larger superstructure, where get ordered along (100) pseudocubic direction...
Mestastable Xe atoms play an important role in the collisional radiative processes of dense xenon plasmas, including those electric thrusters for space vehicles. Recent measurements and calculations electron-excitation out 5p56s J = 2 metastable state (1s5 Paschen notation) have allowed development a model near-infrared (NIR) emissions based on population level through 2p?1s5 transitions, depopulation electron-impact excitation. A modified plasma incorporating newly computed excitation cross...
Abstract The present study investigates the electron impact excitation of bismuth from ground state 6p 3 4 S 3/2 to excited 2 7s P 1/2 . Motivated by latest measurements Marinković et al [J. Phys. B, 49 23 520 (2016)], relativistic distorted wave calculations are performed obtain differential and integrated cross sections for incident energies at 10, 20, 40, 60, 80, 100 eVs. These results compared with available experimental data a good agreement is observed. Our represent first theoretical...
We used the relativistic distorted-wave approximation to calculate excitation of Ar from its ground-state $3{p}^{6}$ configuration higher lying fine-structure levels $3p$${}^{5}$$3d$, $3p$${}^{5}$$5s$, and $3p$${}^{5}$$5p$ manifolds. The calculation has been performed with Dirac-Fock multiconfiguration wave functions for ground excited states. Results differential integrated cross sections are obtained at energies in range up 100 eV, these compared available experimental measurements earlier...
We have used the relativistic distorted-wave approximation to calculate excitation of lowest metastable states neon, argon, krypton, and xenon [the $J=0,2$ levels $n{p}^{5}(n+1)s$ configuration] ten higher-lying fine-structure $n{p}^{5}(n+1)p$ configuration. compare our results with experimental measurements integrated cross section at energies up $400\phantom{\rule{0.3em}{0ex}}\mathrm{eV}$ other theoretical calculations for these sections.
We have performed relativistic distorted-wave calculations to study the excitation of Kr from its ground $4{p}^{6}$ configuration higher lying fine-structure levels $4{p}^{5}$$4d$, $4{p}^{5}$$5p$, and $4{p}^{5}6s$ manifolds. obtained Dirac-Fock multiconfiguration wave functions for excited states. present results differential cross section compare these with available experimental measurements energies up 100 eV. also report integrated sections incident electron 300 eV provide analytic fits...
The inner-shell photoionization of highly charged ions is studied, together with their subsequent radiative decay, within the framework density matrix theory and multiconfiguration Dirac-Fock (MCDF) approach. For decay ions, we investigate in particular how linear polarization characteristic radiation affected if incident light itself polarized. Detailed calculations are performed for $2{p}^{5}3s\ensuremath{\rightarrow}2{p}^{6}$ transitions following production a $2p$ vacancy sodiumlike...
A fully relativistic distorted wave theory has been employed to study electron impact excitations of specific magnetic sublevels in Fe-like W 48+ through Al-like 61+ ions. M-shell excitations, namely, 3p → 3d by have considered these 14 tungsten Excitation cross sections are reported for incident energies from the threshold 20 keV. In addition, each transition, analytic fitting provided. The degree polarization emitted photons decay different excited anisotropic states ions is also...
In the light of recent experimental results Jung et al. [Phys. Rev. A 75, 052707 (2007)], we have carried out relativistic distorted wave calculations for electron impact excitation ten higher-lying fine-structure levels $3{p}^{5}$ $5p$ configuration argon from lowest metastable states (the $J=0,2$ $4s$ configuration). We compare our theoretical with their and discuss differences similar to same states.
Differential (DCS), integral $({Q}_{\mathrm{I}})$, momentum transfer $({Q}_{\mathrm{M}})$, and viscosity $({Q}_{\mathrm{V}})$ cross sections are obtained both experimentally theoretically for elastic electron scattering by lead atoms in the energy range from $10\phantom{\rule{0.3em}{0ex}}\text{to}\phantom{\rule{0.3em}{0ex}}100\phantom{\rule{0.3em}{0ex}}\mathrm{eV}$. The experiment is performed using an spectrometer with crossed atom-beam arrangement. relative DCS measurements placed on...
A detailed study using fully relativistic distorted wave theory for electron impact excitation of Zn-like through Co-like tungsten ions is presented in a wide range incident energies up to 50 keV. We have considered excitations, namely 3d–4p and 3d–nf (n = 4–8) transitions from the M-shell ground state W44+, Cu-like W45+, Ni-like W46+ W47+ ions. report cross sections these dipole allowed all four along with linear polarization photon emissions due decay excited anisotropic states state. also...
Electron impact excitations from ground state L shell viz. n = 2 → 3 transitions in Mg-like W62+, Na-like W63+, Ne-like W64+, F-like W65+ and O-like W66+ ions have been considered. A fully relativistic distorted wave (RDW) theory has used to calculate the excitation cross-sections for an electric magnetic dipole, as well quadrupole these ions, which were observed recently measurements taken electron-beam-ion trap (EBIT-I) at Livermore laboratory. We performed calculations electron energy...