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