Results 21 to 30 of about 200,380 (264)
Theoretical investigation of transition data of astrophysical importance in neutral sulphur
Astronomy & AstrophysicsAccurate and comprehensive atomic data are essential for the modelling of stellar spectra. Uncertainties in the oscillator strengths of specific lines used for abundance analyses directly translate into uncertainties in the derived elemental abundances ...
Li W., Amarsi A. M., Jönsson P.
doaj +1 more source
The broad line region of AGN: Kinematics and physics [PDF]
Serbian Astronomical Journal, 2006 In this paper a discussion of kinematics and physics of the Broad Line Region (BLR) is given. The possible physical conditions in the BLR and problems in determination of the physical parameters (electron temperature and density) are considered. Moreover,
Popović L.Č.
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Stark Broadening of Al IV Spectral Lines
Universe, 2023 Stark widths for 23 transitions in Al IV have been calculated by employing the modified semiempirical method. The results are obtained for an electron density of 1017 cm−3 and temperatures from 10,000 K to 160,000 K.
Milan S. Dimitrijević +1 more
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Atomic and Molecular Processes at Solid Surfaces [PDF]
Journal of Colloid and Interface Science, 1977 Abstract Development of new techniques over the past 15 years permits the investigation of the structure, the composition, and reactivity of solid surfaces on the atomic scale. Our present knowledge of the structure of clean surfaces and of adsorbed monolayers as studied by low-energy electron diffraction is reviewed. Surface crystallography provides
openaire +2 more sources
Ionization equilibrium of nitrogen under kappa electron distributions
Astronomy & AstrophysicsNon-Maxwellian electron energy distributions, such as kappa distributions, have been proposed to explain discrepancies in observed astrophysical plasmas. We employed the coronal approximation to study the level populations of ionized nitrogen under kappa
Song Yunliang, Li Bowen, Chen Ximeng
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Open Astronomy, 2011 We present a review of our previous ab initio calculations of Stark broadening parameters using semi-classical perturbation method for the calculation of Stark widths and shifts, and the SUPERSTRUCURE (SST) code for the determination of atomic structure.
Hamdi R. +3 more
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On mutual neutralization process in collisions of magnesium with hydrogen isotopes
Physics of Complex Systems, 2023 Cross sections for mutual neutralization processes in magnesium-deuterium collisions are calculated in the collision energy range 0.001–100 eV by the probability current method.
Ярослав Владимирович Воронов +1 more
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Pediatric Blood &Cancer, EarlyView.ABSTRACT Pediatric gastroenteropancreatic neuroendocrine neoplasms (GEP‐NENs) are extremely rare and clinically heterogeneous. Management has largely been extrapolated from adult practice. This European Standard Clinical Practice Guideline (ESCP), developed by the EXPeRT network in collaboration with adult NEN experts, provides (adult) evidence ...
Michaela Kuhlen +23 more
wiley +1 more source
Electron energy-loss spectroscopy of autoionizing states of zinc [PDF]
Serbian Astronomical Journal, 2004 Autoionizing energy-loss spectra of Zn from 10.8 to 12.5 eV, for incident electron energies between 20 and 100 eV, have been recorded at scattering angles from 0° to 10°.
Predojević B. +4 more
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Pediatric Blood &Cancer, EarlyView.ABSTRACT Primary cutaneous anaplastic large cell lymphoma (pcALCL) is a rare pediatric CD30‐positive T‐cell lymphoproliferative disorder with an excellent prognosis, but its genomic drivers are poorly defined. We report three children with skin‐limited disease demonstrating striking molecular heterogeneity, including NPM::ALK, NUP214::FRK, and a novel ...
Shoshana Greenberger +7 more
wiley +1 more source