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Calculation of atomic integrals between relativistic functions by means of algebraic methods

Identifikátory výsledku

  • Kód výsledku v IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389021%3A_____%2F22%3A00565855" target="_blank" >RIV/61389021:_____/22:00565855 - isvavai.cz</a>

  • Nalezeny alternativní kódy

    RIV/00216208:11320/22:10446465

  • Výsledek na webu

    <a href="https://www.sciencedirect.com/science/article/pii/S0010465522002090?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0010465522002090?via%3Dihub</a>

  • DOI - Digital Object Identifier

    <a href="http://dx.doi.org/10.1016/j.cpc.2022.108490" target="_blank" >10.1016/j.cpc.2022.108490</a>

Alternativní jazyky

  • Jazyk výsledku

    angličtina

  • Název v původním jazyce

    Calculation of atomic integrals between relativistic functions by means of algebraic methods

  • Popis výsledku v původním jazyce

    We propose the use of Sturmian basis set for relativistic atomic structure calculations. We describe a numerically stable algebraic calculation of one- and two-particle radial integrals. The method is illustrated on the basis set independent calculation of energies, electric dipole moments, hyperfine integrals and parity non-conserving (PNC) amplitude for Cs in Dirac-Hartree-Fock approximation with frozen core orbitals. The previously reported results for electric dipole moments and PNC amplitude are found to be strongly basis dependent. Program summary: Program title: PASC CPC Library link to program files: https://doi.org/10.17632/xycmhhcr5h.1 Licensing provisions: MIT Programming language: Fortran 2008 Nature of problem: Precise atomic measurements require reliable and highly accurate atomic structure calculations. Here we deal with the problem of numerical stability of the atomic integrals and basis set independence of the calculations. Solution method: The radial parts of the electronic orbitals are expanded in a discrete Sturmian functions that are eigenfunctions of one of the generators of the so(2,1) Lie algebra. This algebraic structure is used to deduce algebraic relations between the radial parts of the atomic integrals. This leads to numerically stable calculation, which in turn allows to achieve basis set independence. Additional comments including restrictions and unusual features: The method is currently restricted to the Dirac-Hartree-Fock method. However, this limitation will be lifted in future versions, which will be extended with the coupled clusters method.

  • Název v anglickém jazyce

    Calculation of atomic integrals between relativistic functions by means of algebraic methods

  • Popis výsledku anglicky

    We propose the use of Sturmian basis set for relativistic atomic structure calculations. We describe a numerically stable algebraic calculation of one- and two-particle radial integrals. The method is illustrated on the basis set independent calculation of energies, electric dipole moments, hyperfine integrals and parity non-conserving (PNC) amplitude for Cs in Dirac-Hartree-Fock approximation with frozen core orbitals. The previously reported results for electric dipole moments and PNC amplitude are found to be strongly basis dependent. Program summary: Program title: PASC CPC Library link to program files: https://doi.org/10.17632/xycmhhcr5h.1 Licensing provisions: MIT Programming language: Fortran 2008 Nature of problem: Precise atomic measurements require reliable and highly accurate atomic structure calculations. Here we deal with the problem of numerical stability of the atomic integrals and basis set independence of the calculations. Solution method: The radial parts of the electronic orbitals are expanded in a discrete Sturmian functions that are eigenfunctions of one of the generators of the so(2,1) Lie algebra. This algebraic structure is used to deduce algebraic relations between the radial parts of the atomic integrals. This leads to numerically stable calculation, which in turn allows to achieve basis set independence. Additional comments including restrictions and unusual features: The method is currently restricted to the Dirac-Hartree-Fock method. However, this limitation will be lifted in future versions, which will be extended with the coupled clusters method.

Klasifikace

  • Druh

    J<sub>imp</sub> - Článek v periodiku v databázi Web of Science

  • CEP obor

  • OECD FORD obor

    10301 - Atomic, molecular and chemical physics (physics of atoms and molecules including collision, interaction with radiation, magnetic resonances, Mössbauer effect)

Návaznosti výsledku

  • Projekt

    <a href="/cs/project/GA20-21179S" target="_blank" >GA20-21179S: Studium nehermitovských degenerací (tzv. zvláštních bodů) v atomové fyzice prostřednictvím XUV laserových impulzů</a><br>

  • Návaznosti

    I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Ostatní

  • Rok uplatnění

    2022

  • Kód důvěrnosti údajů

    S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Údaje specifické pro druh výsledku

  • Název periodika

    Computer Physics Communications

  • ISSN

    0010-4655

  • e-ISSN

    1879-2944

  • Svazek periodika

    280

  • Číslo periodika v rámci svazku

    November

  • Stát vydavatele periodika

    NL - Nizozemsko

  • Počet stran výsledku

    15

  • Strana od-do

    108490

  • Kód UT WoS článku

    000862745700007

  • EID výsledku v databázi Scopus

    2-s2.0-85136474840