Results 1 to 10 of about 205,731 (294)

Short range correlations and the isospin dependence of nuclear correlation functions [PDF]

open access: yesPhysics Letters B, 2018
Pair densities and associated correlation functions provide a critical tool for introducing many-body correlations into a wide-range of effective theories.
R. Cruz-Torres   +7 more
doaj   +4 more sources

Bayesian optimization for the inverse scattering problem in quantum reaction dynamics

open access: yesNew Journal of Physics, 2019
We propose a machine-learning approach based on Bayesian optimization to build global potential energy surfaces (PES) for reactive molecular systems using feedback from quantum scattering calculations.
R A Vargas-Hernández   +3 more
doaj   +2 more sources

Use of the group theory for classification of electronic states of acetylene [PDF]

open access: yesJournal of the Serbian Chemical Society, 2003
The electronic states of the acetylene molecule are classified employing the group theory combined with the use of the Walsh diagrams and some elementary quantum chemical considerations.
MILJENKO PERIC, STANKA JEROSIMIC
doaj   +3 more sources

Ab initio Calculations of Lepton-Nucleus Scattering

open access: yesFrontiers in Physics, 2020
The advent of high precision measurements of neutrinos and their oscillations calls for accurate predictions of their interactions with nuclear targets utilized in the detectors.
Noemi Rocco, Noemi Rocco
doaj   +1 more source

Ab initio Gamow shell-model calculations for dripline nuclei

open access: yesHe jishu, 2023
We developed a Gamow shell model based on first principles and successfully applied it to the nuclei around driplines. Herein, we review the theoretical and technical developments of this method. Starting from the realistic nuclear forces, the model uses
ZHANG Shuang, GENG Yifang, XU Furong
doaj   +1 more source

Ab-Initio Calculations [PDF]

open access: yes, 2017
Due to the difficulties found in the direct solution of the Schrodinger equation, different simplified approaches were proposed and are nowadays widely used. Among them, those most usually employed are the Hartree–Fock and the Density Functional Theory, which we revisit in the present chapter.
Chinesta, Francisco   +1 more
openaire   +3 more sources

Ab initio calculation of inelastic scattering [PDF]

open access: yesPhysical Chemistry Chemical Physics, 2017
We calculate nonresonant inelastic electron and X-ray scattering cross sections for bound-to-bound transitions in atoms and molecules fromab initioelectronic wavefunctions.
Andrés Moreno Carrascosa   +1 more
openaire   +3 more sources

Ab initio calculation of 7Li photodisintegration [PDF]

open access: yesPhysics Letters B, 2004
11 pages with 3 ...
Bacca, Sonia   +4 more
openaire   +2 more sources

Raman spectra of BN-nanotubes: Ab-initio and bond-polarizability model calculations [PDF]

open access: yes, 2005
We present it ab-initio calculations of the non-resonant Raman spectra of zigzag and armchair BN nanotubes. In comparison, we implement a generalized bond-polarizability model where the parameters are extracted from first-principles calculations of the ...
Lazzeri, Michele   +3 more
core   +5 more sources

Ab initio calculations of dilithiopropenes [PDF]

open access: yesProceedings of the National Academy of Sciences, 1982
Ab initio molecular orbital calculations with the 3-21G basis set show the most stable dilithiopropene structure to be the di-π lithium-bridged structure VI of 1,3-dilithiopropene. This structure is most simply regarded as an ion triplet of two lithium cations and a propenylidene dianion.
D, Kost   +3 more
openaire   +2 more sources

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