Results 21 to 30 of about 9,838,903 (305)
Galaxies, 2018 Ni iv lines can be used as diagnostics for temperature and density for various astrophysical objects. In addition, ionization of Ni2+ is one of the causes of the opacity in the interstellar medium.
Luis Fernández-Menchero +2 more
doaj +1 more source
Ionospheric electron heating, optical emissions, and striations induced by powerful HF radio waves at high latitudes: Aspect angle dependence [PDF]
, 2003 In recent years, large electron temperature increases of 300% (3000 K above background) caused by powerful HF-radio wave injection have been observed during nighttime using the EISCAT incoherent scatter radar near Tromsø in northern Norway.
Rietveld, M. T. +5 more
core +5 more sources
Cross Sections for Electron Scattering from Atomic Tin
Atoms, 2022 The relativistic convergent close-coupling method is applied to calculate cross sections for electron scattering from atomic tin. We present integrated and momentum-transfer cross sections for elastic scattering from the ground and the first four excited
Haadi Umer, Igor Bray, Dmitry V. Fursa
doaj +1 more source
New Journal of Physics, 2023 A most general density-matrix formalism is presented to investigate linear polarization of characteristic lines following electron-impact excitation of atoms or ions with arbitrary nuclear spin, which can account for depolarization of energy levels and ...
Z W Wu +4 more
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Excitation of the 6d 2D → 6p 2Po Radiative Transitions in the Pb+ Ion by Electron Impact
Atoms, 2021 Results of experimental and theoretical investigation of electron-impact excitation of the 6s26d D2→6s26p P2o spectral transitions from the ground 6s26p P21/2o level in the Pb+ ion are presented. The experimental excitation functions for the transitions,
Viktoriya Roman +5 more
doaj +1 more source
Electron impact ionization of small molecules at intermediate energies: the molecular R-matrix with pseudostates method [PDF]
, 2005 A procedure for the ab initio study of electron–molecule collisions at intermediate energies is presented in detail. The molecular R-matrix with pseudostates method is based on the inclusion of discretized continuum states in the close-coupling expansion.
Tennyson, J., Gorfinkiel, J.D.
core +1 more source
Excitation of O2 1?g by electron impact
Journal of Research of the National Bureau of Standards Section A: Physics and Chemistry, 1972 The total and differential cross sections as a function of energy were calculated for electron impact excitation of the O2 1Δ g state from the ground 3 ∑ g ¯ state. The Ochkur-Rudge approximation was used for the exchange amplitude, which was calculated using Hartree-Fock. wave functions with a Gaussian basis.
P S, Julienne, M, Krauss
openaire +2 more sources
Collision Strengths of Astrophysical Interest for Multiply Charged Ions
Atoms, 2023 The electron impact excitation and ionization processes are crucial for modeling the spectra of different astrophysical objects, from atmospheres of late-type stars to remnants of supernovae and up to the light emission from neutron star mergers, to name
Stephan Fritzsche +3 more
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Electron impact excitation of hydrogen Lyman-a radiation
, 1968 An experimental investigation of electron impact excitation of the 2p state of atomic hydrogen is described. A beam of electrons was passed through a chopped beam of hydrogen atoms in a high vacuum apparatus. The modulated flux of Lyman-a photons emitted
Long, Robert L.; Cox, Donald M.; Smith, Stephen J.
core +1 more source
Resistivity of non-crystalline carbon in the 1–100 eV range
New Journal of Physics, 2015 A resistivity model for non-crystalline, solid-density carbon and hydrocarbons is presented for such materials heated by short-pulse, ultra-intense lasers.
A P L Robinson, H Schmitz, P McKenna
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