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Hoyer CE, Lu L, Hu H, Shumilov KD, Sun S, Knecht S, Li X. Correlated Dirac-Coulomb-Breit multiconfigurational self-consistent-field methods. J Chem Phys 2023; 158:044101. [PMID: 36725503 DOI: 10.1063/5.0133741] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
The fully correlated frequency-independent Dirac-Coulomb-Breit Hamiltonian provides the most accurate description of electron-electron interaction before going to a genuine relativistic quantum electrodynamics theory of many-electron systems. In this work, we introduce a correlated Dirac-Coulomb-Breit multiconfigurational self-consistent-field method within the frameworks of complete active space and density matrix renormalization group. In this approach, the Dirac-Coulomb-Breit Hamiltonian is included variationally in both the mean-field and correlated electron treatment. We also analyze the importance of the Breit operator in electron correlation and the rotation between the positive- and negative-orbital space in the no-virtual-pair approximation. Atomic fine-structure splittings and lanthanide contraction in diatomic fluorides are used as benchmark studies to understand the contribution from the Breit correlation.
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Affiliation(s)
- Chad E Hoyer
- Department of Chemistry, University of Washington, Seattle, Washington 98195, USA
| | - Lixin Lu
- Department of Chemistry, University of Washington, Seattle, Washington 98195, USA
| | - Hang Hu
- Department of Chemistry, University of Washington, Seattle, Washington 98195, USA
| | - Kirill D Shumilov
- Department of Chemistry, University of Washington, Seattle, Washington 98195, USA
| | - Shichao Sun
- Department of Chemistry, University of Washington, Seattle, Washington 98195, USA
| | - Stefan Knecht
- Algorithmiq Ltd., Kanavakatu 3C, FI-00160 Helsinki, Finland
| | - Xiaosong Li
- Department of Chemistry, University of Washington, Seattle, Washington 98195, USA
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Sun S, Ehrman JN, Sun Q, Li X. Efficient Evaluation of the Breit Operator in the Pauli Spinor Basis. J Chem Phys 2022; 157:064112. [DOI: 10.1063/5.0098828] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The frequency-independent Coulomb-Breit operator gives rise to the most accurate treatment of two-electron interaction in the non-quantum-electrodynamics regime. The Breit interaction in the Coulomb gauge consists of magnetic and gauge contributions. The high computational cost of the gauge term limits the application of the Breit interaction in relativistic molecular calculations. In this work, we apply the Pauli component integral-density matrix contraction scheme for gauge interaction with a maximum spin- and component separation scheme. We also present two different computational algorithms for evaluating gauge integrals. One is the generalized Obara-Saika algorithm, where the Laplace transformation is used to transform the gauge operator into Gaussian functions and the Obara-Saika recursion is used for reducing the angular momentum. The other algorithm is the second derivative of inverse Coulomb interaction evaluated with Rys-quadrature. This work improves the efficiency of performing Dirac-Hartree-Fock with variational treatment of Breit interaction for molecular systems. We use this formalism to examine relativistic trends in the periodic table, and analyze the relativistic two-electron interaction contributions in heavy-element complexes.
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Affiliation(s)
- Shichao Sun
- Chemistry, University of Washington, United States of America
| | | | - Qiming Sun
- Anxian Investment Management Co. Ltd, China
| | - Xiaosong Li
- Department of Chemistry, University of Washington, United States of America
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Dutta NN. Trend of Gaunt interaction contributions to the electric dipole polarizabilities of noble gas, alkaline-earth, and a few group-12 atoms. Chem Phys Lett 2020. [DOI: 10.1016/j.cplett.2020.137911] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Santana JA, Lopez-Dauphin NA, Morales Butler EJ, Beiersdorfer P. RELATIVISTIC MR-MP ENERGY LEVELS FOR L-SHELL IONS OF SULFUR AND ARGON. THE ASTROPHYSICAL JOURNAL. SUPPLEMENT SERIES 2018; 238:34. [PMID: 30369650 PMCID: PMC6200352 DOI: 10.3847/1538-4365/aae14e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Calculated level energies for valence and K-vacancy states are provided for the ion series S VII - S XIV and Ar IX - Ar XVI. The calculations were performed with the relativistic Multi-Reference Mxller-Plesset Perturbation Theory method (MR-MP). The data set includes all the level energies with configurations 1s 22(s, p) q , 1s 22(s, p) q-1 nl, 1s 12(s, p) q+1, 1s 12(s, p) q nl, 2(s, p) q+2 and 2(s, p) q+1 nl, where 1 ≤ q ≤ 8, n ≤ 5 and l ≤ 3. We have compared our results with data from the National Institute of Standards and Technology (NIST) on-line database and with previous calculations. The average deviation of valence level energies ranges from 0.16 eV in Ne-like ions to 0.01 eV in Li-like ions, showing that the present MR-MP valence level energies are highly accurate. In the case of K-vacancy states, the deviation is generally below 0.3 eV for Li-like S XIV and Ar XVI. The deviation for K-vacancy energies in other L-shell ions (Be-, B-, C-, N- and O-like Ar ions) is higher but likely because the NIST-recommended values have a higher uncertainty. The data set includes many n = 4 and n = 5 valence and K-vacancy levels in L-shell ions of S and Ar not previously reported. The data can be used for line identification and modeling of L-shell ions of S and Ar in astrophysical and laboratory-generated plasmas, and as energy references in the absence of more accurate laboratory measurements.
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Affiliation(s)
- Juan A. Santana
- Department of Chemistry, The University of Puerto Rico at Cayey, P. O. Box 372230, Cayey, PR 00737-2230, USA
| | - Nahyr A. Lopez-Dauphin
- Department of Chemistry, The University of Puerto Rico at Cayey, P. O. Box 372230, Cayey, PR 00737-2230, USA
- Department of Chemistry, 359 Natural Sciences Complex, University at Bu alo, Bu alo, NY 14260-3000, USA
| | - Emmanuel J. Morales Butler
- Department of Natural Sciences - Mathematics, The University of Puerto Rico at Utuado, P.O. Box 2500 Utuado, PR 00641, USA
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RELATIVISTIC MR-MP ENERGY LEVELS FOR L-SHELL IONS OF SILICON. THE ASTROPHYSICAL JOURNAL. SUPPLEMENT SERIES 2018; 234. [PMID: 29545653 DOI: 10.3847/1538-4365/aa94d2] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Level energies are reported for Si V, Si VI, Si VII, Si VIII, Si IX, Si X, Si XI and Si XII. The energies have been calculated with the relativistic Multi-Reference Møller-Plesset Perturbation Theory method and include valence and K-vacancy states with nl up to 5f. The accuracy of the calculated level energies is established by comparison with the recommended data listed in the National Institute of Standards and Technology (NIST) on-line database. The average deviation of valence level energies ranges from 0.20 eV in Si V to 0.04 eV in Si XII. For K-vacancy states, the available values recommended in the NIST database are limited to Si XII and Si XIII. The average energy deviation is below 0.3 eV for K-vacancy states. The extensive and accurate dataset presented here greatly augments the amount of available reference level energies. We expect our data to ease the line identification of L-shell ions of Si in celestial sources and laboratory generated plasmas, and to serve as energy references in the absence of more accurate laboratory measurements.
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Kozioł K, Giménez CA, Aucar GA. Breit corrections to individual atomic and molecular orbital energies. J Chem Phys 2018; 148:044113. [DOI: 10.1063/1.5017986] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Karol Kozioł
- Institute for Modelling and Innovative Technology, IMIT, Corrientes, Argentina
| | - Carlos A. Giménez
- Institute for Modelling and Innovative Technology, IMIT, Corrientes, Argentina
- Physics Department, Natural and Exact Science Faculty, Northeastern University of Argentina, Corrientes, Argentina
| | - Gustavo A. Aucar
- Institute for Modelling and Innovative Technology, IMIT, Corrientes, Argentina
- Physics Department, Natural and Exact Science Faculty, Northeastern University of Argentina, Corrientes, Argentina
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Repisky M, Konecny L, Kadek M, Komorovsky S, Malkin OL, Malkin VG, Ruud K. Excitation Energies from Real-Time Propagation of the Four-Component Dirac–Kohn–Sham Equation. J Chem Theory Comput 2015; 11:980-91. [DOI: 10.1021/ct501078d] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Michal Repisky
- The
Centre for Theoretical and Computational Chemistry, Department of
Chemistry, UiT, The Arctic University of Norway, Tromsø, Norway
| | - Lukas Konecny
- Department
of Inorganic Chemistry, Faculty of Natural Sciences, Comenius University, Bratislava, Slovak Republic
| | - Marius Kadek
- The
Centre for Theoretical and Computational Chemistry, Department of
Chemistry, UiT, The Arctic University of Norway, Tromsø, Norway
| | - Stanislav Komorovsky
- The
Centre for Theoretical and Computational Chemistry, Department of
Chemistry, UiT, The Arctic University of Norway, Tromsø, Norway
| | - Olga L. Malkin
- Department
of Inorganic Chemistry, Faculty of Natural Sciences, Comenius University, Bratislava, Slovak Republic
- Institute
of Inorganic Chemistry, Slovak Academy of Sciences, Bratislava, Slovak Republic
| | - Vladimir G. Malkin
- Institute
of Inorganic Chemistry, Slovak Academy of Sciences, Bratislava, Slovak Republic
| | - Kenneth Ruud
- The
Centre for Theoretical and Computational Chemistry, Department of
Chemistry, UiT, The Arctic University of Norway, Tromsø, Norway
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Critical Assessment of Theoretical Calculations of Atomic Structure and Transition Probabilities: An Experimenter’s View. ATOMS 2014. [DOI: 10.3390/atoms2010015] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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Shuvalov VA. Electron and nuclear dynamics in many-electron atoms, molecules and chlorophyll-protein complexes: a review. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 2007; 1767:422-33. [PMID: 17408587 DOI: 10.1016/j.bbabio.2007.02.002] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/14/2006] [Revised: 01/30/2007] [Accepted: 02/01/2007] [Indexed: 11/15/2022]
Abstract
It has been shown [V.A. Shuvalov, Quantum dynamics of electrons in many-electron atoms of biologically important compounds, Biochemistry (Mosc.) 68 (2003) 1333-1354; V.A. Shuvalov, Quantum dynamics of electrons in atoms of biologically important molecules, Uspekhi biologicheskoi khimii, (Pushchino) 44 (2004) 79-108] that the orbit angular momentum L of each electron in many-electron atoms is L=mVr=nPlanck's and similar to L for one-electron atom suggested by N. Bohr. It has been found that for an atom with N electrons the total electron energy equation E=-(Z(eff))(2)e(4)m/(2n(2)Planck's(2)N) is more appropriate for energy calculation than standard quantum mechanical expressions. It means that the value of L of each electron is independent of the presence of other electrons in an atom and correlates well to the properties of virtual photons emitted by the nucleus and creating a trap for electrons. The energies for elements of the 1st up to the 5th rows and their ions (total amount 240) of Mendeleev' Periodical table were calculated consistent with the experimental data (deviations in average were 5 x 10(-3)). The obtained equations can be used for electron dynamics calculations in molecules. For H(2) and H(2)(+) the interference of electron-photon orbits between the atoms determines the distances between the nuclei which are in agreement with the experimental values. The formation of resonance electron-photon orbit in molecules with the conjugated bonds, including chlorophyll-like molecules, appears to form a resonance trap for an electron with E values close to experimental data. Two mechanisms were suggested for non-barrier primary charge separation in reaction centers (RCs) of photosynthetic bacteria and green plants by using the idea of electron-photon orbit interference between the two molecules. Both mechanisms are connected to formation of the exciplexes of chlorophyll-like molecules. The first one includes some nuclear motion before exciplex formation, the second one is related to the optical transition to a charge transfer state.
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Affiliation(s)
- Vladimir A Shuvalov
- Institute of Basic Biological Problems, Russian Academy of Sciences, Pushchino Moscow Region, 142290, Russia.
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Relativistic multireference Møller-Plesset perturbation theory calculations for the term energies and transition probabilities of ions in the nitrogen isoelectronic sequence. ADVANCES IN QUANTUM CHEMISTRY 2001. [DOI: 10.1016/s0065-3276(05)39016-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Canal Neto A, Librelon P, Jorge F. Highly accurate relativistic gaussian basis sets for closed-shell atoms from He through to No. Chem Phys Lett 2000. [DOI: 10.1016/s0009-2614(00)00816-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Malli GL, Ishikawa Y. The generator coordinate Dirac–Fock method for open-shell atomic systems. J Chem Phys 1998. [DOI: 10.1063/1.477545] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Accurate universal gaussian basis set for helium through calcium generated with the generator coordinate Dirac-Fock method. ACTA ACUST UNITED AC 1997. [DOI: 10.1016/s0166-1280(96)04824-5] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Koc K, Ishikawa Y, Kagawa T, Kim YK. Relativistic modification of asymptotic configuration interaction in the carbon isoelectronic sequence. Chem Phys Lett 1996. [DOI: 10.1016/s0009-2614(96)01174-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Jorge F, Bobbio T, da Silva A. Adapted Gaussian basis sets for the relativistic closed-shell atoms from helium to barium generated with the generator coordinate Dirac-Fock method. Chem Phys Lett 1996. [DOI: 10.1016/s0009-2614(96)01287-0] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Jorge FE, da Silva ABF. On the inclusion of the Breit interaction term in the closed‐shell generator coordinate Dirac–Fock formalism. J Chem Phys 1996. [DOI: 10.1063/1.472390] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Jorge F, Silva AD. The generator coordinate Dirac–Fock method applied to beryllium-like atomic species. CAN J CHEM 1996. [DOI: 10.1139/v96-193] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The recently formulated generator coordinate Dirac–Fock method for relativistic closed-shell atoms is applied to the Be atom and Be-like ions Ne6+, Ar14+, and Sn46+ in order to assess its efficacy for light atomic systems. The Dirac–Fock equations are integrated numerically in the generator coordinate Dirac–Fock method so as to generate Gaussian basis sets for the atomic species under study. The results obtained with the application of the generator coordinate Dirac–Fock method in this work for Dirac–Fock–Coulomb and Dirac–Fock–Breit energies for Be-like ions are in excellent agreement with Declaux's benchmark numerical calculations, and are better than the Dirac–Fock–Coulomb and Dirac–Fock–Breit energies obtained with even-tempered Gaussian-type function calculations. For the Be atom, the Dirac–Fock–Coulomb energy result obtained with the generator coordinate Dirac–Fock method is lower than the corresponding value obtained with the Declaux's numerical finite-difference program. Key words: Dirac–Fock–Coulomb energy, Dirac–Fock–Breit energy, Gaussian basis sets, generator coordinate Dirac–Fock method.
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Ishikawa Y, Koc K. Relativistic many-body perturbation theory for general open-shell multiplet states of atoms. PHYSICAL REVIEW. A, ATOMIC, MOLECULAR, AND OPTICAL PHYSICS 1996; 53:3966-3973. [PMID: 9913359 DOI: 10.1103/physreva.53.3966] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Jorge FE, da Silva ABF. A generator coordinate version of the closed‐shell Dirac–Fock equations. J Chem Phys 1996. [DOI: 10.1063/1.471288] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Ishikawa Y, Koc K. Relativistic many-body perturbation theory based on the no-pair Dirac-Coulomb-Breit Hamiltonian: Relativistic correlation energies for the noble-gas sequence through Rn (Z=86), the group-IIB atoms through Hg, and the ions of Ne isoelectronic sequence. PHYSICAL REVIEW. A, ATOMIC, MOLECULAR, AND OPTICAL PHYSICS 1994; 50:4733-4742. [PMID: 9911470 DOI: 10.1103/physreva.50.4733] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Malli GL, Da Silva ABF, Ishikawa Y. Highly accurate relativistic universal Gaussian basis set: Dirac–Fock–Coulomb calculations for atomic systems up to nobelium. J Chem Phys 1994. [DOI: 10.1063/1.468311] [Citation(s) in RCA: 75] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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(Ilyabaev) EE, Kaldor U, Ishikawa Y. Relativistic coupled cluster method based on Dirac—Coulomb—Breit wavefunctions. Ground state energies of atoms with two to five electrons. Chem Phys Lett 1994. [DOI: 10.1016/0009-2614(94)00317-3] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Koc K, Ishikawa Y. Single-Fock-operator method for matrix Dirac-Fock self-consistent-field calculations on open-shell atoms. PHYSICAL REVIEW. A, ATOMIC, MOLECULAR, AND OPTICAL PHYSICS 1994; 49:794-798. [PMID: 9910302 DOI: 10.1103/physreva.49.794] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Ishikawa Y, Quiney HM. Relativistic many-body perturbation-theory calculations based on Dirac-Fock-Breit wave functions. PHYSICAL REVIEW. A, ATOMIC, MOLECULAR, AND OPTICAL PHYSICS 1993; 47:1732-1739. [PMID: 9909124 DOI: 10.1103/physreva.47.1732] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Da Silva A, Malli G, Ishikawa Y. Relativistic universal Gaussian basis set for Dirac—Fock—Coulomb and Dirac—Fock—Breit SCF calculations on heavy atoms. Chem Phys Lett 1993. [DOI: 10.1016/0009-2614(93)85387-4] [Citation(s) in RCA: 27] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Malli GL, Ishikawa Y. Universal Gaussian basis set for accurate ab initio /P relat ivistic Dirac-Fock calculations. PHYSICAL REVIEW. A, ATOMIC, MOLECULAR, AND OPTICAL PHYSICS 1993; 47:143-146. [PMID: 9908905 DOI: 10.1103/physreva.47.143] [Citation(s) in RCA: 109] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Ilyabaev E, Kaldor U. The relativistic open shell coupled cluster method: Direct calculation of excitation energies in the Ne atom. J Chem Phys 1992. [DOI: 10.1063/1.463416] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Matrix Dirac—Fock—Breit SCF calculations on heavy atoms using geometric basis sets of Gaussian functions. Chem Phys Lett 1992. [DOI: 10.1016/0009-2614(92)85104-i] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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