A detailed study is presented of the decaying solar active region NOAA 10103 observed with the Coronal Diagnostic Spectrometer (CDS), the Michelson Doppler Imager (MDI) and the Extreme-ultraviolet Imaging Telescope (EIT) onboard the Solar and Heliospheric Observatory (SOHO). Electron density maps formed using Si x(356.03 Å/347.41 Å) show that the density varies from ∼10 cm in the active region ...

A study of electron momentum density distribution in AlAs by means of Compton profiles is presented. The Compton profile measurement on polycrystalline sample of AlAs is performed employing 59.54 keV gamma-rays emanating from Am radioisotope. The measurement is compared with the empirical pseudopotential method (EPM) and there is good agreement between two data. The ionic model calculations for...

[1] Observations of the electron density ne based on measurement of the upper hybrid resonance frequency by the Polar spacecraft Plasma Wave Instrument (PWI) are available for March 1996 to September 1997, during which time the Polar orbit sampled all MLT values three times. In a previous study, we modeled the electron density dependence along field lines as ne = ne0(Rmax/R) , where ne0 is the ...

[1] With the advent of the Global Positioning System (GPS) measurements (from both ground-based and satellite-based receivers), the number of available ionospheric measurements has dramatically increased. Total electron content (TEC) measurements from GPS instruments augment observations from more traditional ionospheric instruments like ionospheric sounders and Langmuir probes. This volume of ...

in which the Hamilton operator Ĥtot describes all interactions within the system. The solution Φ, the wavefunction of the system, describes the state of all N electrons and M atomic nuclei, and Etot is the total energy of this state. Usually, the problem is split by separating the electronic from the ionic part by making use of the Born-Oppenheimer approximation [1]. Next we consider the electr...

ABSTRACT: General theorem describing a relation between diagonal of one-electron density matrix and a certain class of many-electron ensembles of determinant states is proved. As a corollary to this theorem a constructive proof of sufficiency of Coleman’s representability conditions is obtained. It is shown that there exist rigorous schemes for construction of energy of many-electron system as ...

ground state geometries have been computed using density functional theory (dft) at b3lyp/6-31g(d,p) level of theory. the excitation energies and spectroscopic parameters have been computed using long range corrected (lc) hybrid functional by time dependent density functional theory (tddft) with lc-blyp level of theory. the polarizable continuum model (pcm) has been used for evaluating bulk sol...

Citation Dabo, Ismaila. et al. "Koopmans' condition for density-functional theory. Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. The MIT Faculty has made this article openly available. Please share how this access benefits you. Your story matters. In approximate Kohn-Sham density...