Results 11 to 20 of about 8,906 (257)

Towards the Provision of Accurate Atomic Data for Neutral Iron

open access: yesGalaxies, 2018
The rich emission and absorption line spectra of Fe I may be used to extract crucial information on astrophysical plasmas, such as stellar metallicities.
Andrew Conroy   +3 more
doaj   +1 more source

Computational Comparison of CPDT to other Conjugated Linkers in Triarylamine-based Organic Dyes

open access: yesCHIMIA, 2013
The use of the cyclopentadithiophene (cpdt) fragment to chemically link electron donor and acceptor groups has become a rather common procedure to design new organic dyes with enhanced light harvesting properties.
Clàudia Climent, David Casanova
doaj   +1 more source

Current Status and Developments of the Atomic Database on Rare-Earths at Mons University (DREAM)

open access: yesAtoms, 2020
The main purpose of the Database on Rare Earths At Mons University (DREAM) is to provide the scientific community with updated spectroscopic parameters related to lanthanide atoms (Z = 57–71) in their lowest ionization stages.
Pascal Quinet, Patrick Palmeri
doaj   +1 more source

The 13th International Colloquium on Atomic Spectra and Oscillator Strengths for Astrophysical and Laboratory Plasmas

open access: yesAtoms, 2020
The 13th International Colloquium on Atomic Spectra and Oscillator Strengths for Astrophysical and Laboratory Plasmas (ASOS2019), co-hosted by Fudan and Lund Universities, was held at Fudan University from 23–27 June 2019 [...]
Jun Xiao, Tomas Brage, Roger Hutton
doaj   +1 more source

Pseudo-Relativistic Hartree–Fock and Fully Relativistic Dirac–Hartree–Fock Calculations of Radiative Parameters in the Fifth Spectrum of Lutetium (Lu V)

open access: yesAtoms, 2022
Using two independent theoretical methods based on the pseudo-relativistic Hartree–Fock (HFR) and the fully relativistic Multiconfigurational Dirac–Hartree–Fock (MCDHF) approaches, we computed the radiative parameters (transition probabilities and ...
Lucas Maison   +2 more
doaj   +1 more source

Structure Calculations in Nd III and U III Relevant for Kilonovae Modelling

open access: yesAtoms, 2022
The detection of gravitational waves and electromagnetic signals from the neutron star merger GW170817 has provided evidence that these astrophysical events are sites where the r-process nucleosynthesis operates.
Ricardo F. Silva   +5 more
doaj   +1 more source

Oscillator strengths with pseudopotentials [PDF]

open access: yesPhysical Review A, 1998
The time-dependent local-density approximation (TDLDA) is shown to remain accurate in describing the atomic response of IB elements under the additional approximation of using pseudopotentials to treat the effects of core electrons. This extends the work of Zangwill and Soven who showed the utility of the all-electron TDLDA in the atomic response ...
Yabana, K., Bertsch, G. F.
openaire   +2 more sources

Electron energy spectrum and oscillator strengths of quantum transitions in double quantum ring nanostructure driven by electric field

open access: yesCondensed Matter Physics, 2018
The effect of homogeneous electric field on the energy spectrum, wave functions of electron and oscillator strengths of intra-band quantum transitions in a double cylindrical quantum ring (GaAs/Al_{x}Ga_{1-x}As) is studied within the approximations of ...
O.M. Makhanets, V.I. Gutsul, A.I. Kuchak
doaj   +1 more source

Where Is the Electronic Oscillator Strength? Mapping Oscillator Strength across Molecular Absorption Spectra [PDF]

open access: yesThe Journal of Physical Chemistry A, 2016
The effectiveness of solar energy capture and conversion materials derives from their ability to absorb light and to transform the excitation energy into energy stored in free carriers or chemical bonds. The Thomas-Reiche-Kuhn (TRK) sum rule mandates that the integrated (electronic) oscillator strength of an absorber equals the total number of ...
Zheng L.   +4 more
openaire   +2 more sources

Optical properties of GaAs/Al_xGa_{1-x}As/GaAs quantum dot with off-central impurity driven by electric field

open access: yesCondensed Matter Physics, 2018
The effect of a constant electric field and donor impurity on the energies and oscillator strengths of electron intraband quantum transitions in double-well spherical quantum dot GaAs/Al_xGa_{1-x}As/GaAs is researched.
V.A. Holovatsky   +2 more
doaj   +1 more source

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