Browsing DFis-Artículos, capítulos, libros... by Title
Now showing items 103-122 of 135
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Quantitative comparison of impurity transport in turbulence reduced and enhanced scenarios at Wendelstein 7-X
(IOP Publishing, 2023)We assess the turbulent particle transport being responsible for the limitation of the confinement and, thus, the overall performance of the neoclassically optimized stellarator Wendelstein 7-X. The radial particle transport ... -
Quantum confinement of the covalent bond beyond the Born-Oppenheimer approximation
(American Chemical Society, 2013)Dirichlet boundary conditions with different symmetries, spherical and cylindrical impenetrable surfaces, are imposed on the covalent electron pair of a molecular bond. Accurate results for different observable like energy ... -
Quantum defect asymptotics at the critical charge: A study of the integrality conjecture
(Elsevier, 2018)A single (n, ℓ) electron outside an (N −1)-electron atomic core is bound as long as Z > Zc = N − 1. A conjecture is examined, according to which the quantum defect of the outermost electron satisfies limZ!Zc δn,ℓ(Z) = Nℓ, ... -
Quantum Features of a Barely Bound Molecular Dopant: Cs2(3Σu) in Bosonic Helium Droplets of Variable Size
(American Chemical Society, 2011)We present in this work the study of small 4HeN-Cs2(3Σu) aggregates (2 <= N <= 30) through combined variational, diffusion Monte Carlo (DMC), and path integral Monte Carlo (PIMC) calculations. The full surface is modeled ... -
Quantum rotation of Rb2(3Σ+u) attached to HeN droplets: a path-integral Monte Carlo study
(Springer, 2013)Doped HeNRb2(3Σ+u) systems, with N = 20 and 40, have been studied by means of a path integral Monte Carlo method at two different temperatures T = 1 K and 2 K. The impurity, Rb2, is assumed as a rigid rotor and results ... -
Quasi-symmetry and the nature of radial turbulent transport in quasi-poloidal stellarators
(AIP Publishing, 2016)Quasi-symmetric configurations have a better neoclassical confinement compared to that of standard stellarators. The reduction of the neoclassical viscosity along the direction of quasi-symmetry should facilitate the ... -
Radial-to-orbital motion transition in cylindrical Langmuir probes studied with particle-in-cell simulations
(2016)A particle-in-cell (PIC) simulation of the plasma sheath around a cylindrical Langmuir probe has been developed to evaluate the ion current collected by the probe. The simulation includes the positive ion thermal motion ... -
Role of Boson-Fermion Statistics on the Raman Spectra of Br2 X in Helium Clusters
(American Physical Society, 2004)The role played by the bosonic or fermionic character of He atoms surrounding a Br2 X molecule is analyzed through vibrotational Raman spectra simulations. Quantum chemistry-type calculations reveal the spin multiplicity ... -
El siglo XIX: la Teoría Electromagnética
(2006-09-26) -
Simple and analytical function for the Stark profile of the Hα line and its application to plasma characterization
(Elsevier, 2018)The increasing application of plasma based technologies over a wide range of fields has led to the necessity of an optimal determination of the characteristic parameters of the plasma systems. Optical Emission Spectroscopy ... -
Simulations of pulse propagation in optical fibers using graphics processor units
(Elsevier, 2011)Several simple cases of pulse propagation in optical fibers have been simulated using a graphics processor unit. Comparisons with simulations in a computer processor unit are also reported. Speedups from 4 to 36 have been ... -
Singlet vs. triplet interelectronic repulsion in confined atoms
(Elsevier, 2018)Hund’s multiplicity rule invariably holds for the ground configurations of few-electron atoms as well as those of multi-electron quantum dots. However, the ordering of the corresponding interelectronic repulsions exhibits ... -
Software público, libre, abierto, gratuito, privativo y comercial para la innovación y mejora de la calidad en la docencia, investigación, gestión y asistencia
(Universidad de Córdoba, Vicerrectorado de Innovación y Calidad Docente, 2007)The public free software (now renamed as open software) is the basis of the open source software (OSS) project. This initiative promotes the use of open standards and platform-independent accessibility. Many OSS products ... -
Spatial Distribution of Wettability in Aluminum Surfaces Treated with an Atmospheric-Pressure Remote-Plasma
(MDPI, 2019)The use of atmospheric-pressure remote plasmas (postdischarge) sustained in argon and argon–nitrogen for the treatment of aluminum surfaces has been studied to better understand the underlying mechanisms responsible for ... -
Spectral Methods in Nonlinear Optics Equations for Non-Uniform Grids Using an Accelerated NFFT Scheme
(MDPI, 2023)In this work, we propose the use of non-homogeneous grids in 1D and 2D for the study of various nonlinear physical equations using spectral methods. As is well known, the use of spectral methods allow a faster resolution ... -
Spectroscopic Study of Ar-N2 Spatial Postdischarges Sustained in Atmospheric-Pressure Microwave Plasmas
(Wiley, 2025)Atmospheric pressure microwave-sustained Ar-N2 spatial postdischarges are characterized by a high content of reactive nitrogen species as well as low gas temperature values with potential to be used in different applications, ... -
Spherical image potentials for an N-charged particle system
(The Royal Society Publishing, 2024)The potential energy interaction between a system of N-charged particles and a spherical conducting surface is obtained by means of direct integration of the electrostatic energy density. Making use of the image charge ... -
Spin-driven structural effects in alkali doped 4He clusters from quantum calculations
(American Institute of Physics, 2009)In this paper, we carry out variational Monte Carlo and diffusion Monte Carlo (DMC) calculations for Li2(1Sigma)(4He)N and Li2(3Sigma)(4He)N with N up to 30 and discuss in detail the results of our computations. After a ... -
Stability after confinement of the H atom
(Elsevier, 2019)The stability of a spherically confined atomic system when confinement is removed is studied. We consider s, p, d, and f states of the Hydrogen atom confined by a finite barrier. The stability is characterized in terms of ... -
Stark broadening data for Si II multiplets within 3s3p(3Po)nl configuration
(Elsevier, 2023)The electron-impact widths for 13 Si II multiplets, belonging to the 3s3p(3Po)nl configuration, have been calculated by using the modified semiempirical method. Since a number of these lines is in visible, they are of ...