Ian Philip Grant

Ian Philip Grant's AcademicInfluence.com Rankings

Ian Philip Grant

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Physics

Ian Philip Grant's Degrees

PhD Physics University of California, Berkeley
Masters Physics University of California, Berkeley
Bachelors Physics University of California, Berkeley

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Ian Philip Grant's Published Works

Number of citations in a given year to any of this author's works

Total number of citations to an author for the works they published in a given year. This highlights publication of the most important work(s) by the author

Published Works

GRASP: A general-purpose relativistic atomic structure program (1989) (1091)
An atomic multiconfigurational Dirac-Fock package (1984) (616)
RELATIVISTIC CALCULATION OF ATOMIC STRUCTURES. (1970) (610)
GRASP92: a package for large-scale relativistic atomic structure calculations (1996) (562)
Relativistic quantum theory of atoms and molecules (2006) (536)
The grasp2K relativistic atomic structure package (2007) (472)
New version: Grasp2K relativistic atomic structure package (2013) (432)
Gauge invariance and relativistic radiative transitions (1974) (357)
A program to calculate transverse Breit and QED corrections to energy levels in a multiconfiguration Dirac-Fock environment (1984) (345)
Foundations of the Relativistic Theory of Atomic and Molecular Structure (1988) (201)
Dirac–Fock calculations of X-ray scattering factors and contributions to the mean inner potential for electron scattering (1994) (178)
Relativistic self-consistent fields (1961) (149)
A Collection of Problems on Mathematical Physics (1967) (136)
Discrete space theory of radiative transfer I. Fundamentals (1969) (121)
Low-energy electron scattering by Fe XXIII and Fe VII using the Dirac R-matrix method (1987) (118)
Quasilinearization and Non-Linear Boundary Value Problems (1968) (115)
The transverse electron-electron interaction in atomic structure calculations (1980) (110)
Matrix representation of operator products (1984) (99)
Relativistic Quantum Theory of Atoms and Molecules: Theory and Computation (Springer Series on Atomic, Optical, and Plasma Physics) (2010) (98)
Breit interaction in multi-configuration relativistic atomic calculations (1976) (95)
Application of relativistic theories and quantum electrodynamics to chemical problems (2000) (94)
The Dirac equation in the algebraic approximation (1987) (92)
The direct and indirect effects in the relativistic modification of atomic valence orbitals (1978) (88)
The Dirac equation in the algebraic approximation. V. Self-consistent field studies including the Breit interaction (1987) (88)
Ab initio relativistic quantum chemistry: four-components good, two-components bad!* (1998) (85)
Rayleigh-Ritz approximation of the Dirac operator in atomic and molecular physics (2000) (83)
The effect of relativity on atomic wave functions (1967) (80)
Studies in multiconfiguration Dirac-Fock theory. I. The low-lying spectrum of Hf III (1976) (77)
Program to calculate pure angular momentum coefficients in jj-coupling ? ? This program can be downl (2001) (72)
Conditions for convergence of variational solutions of Dirac's equation in a finite basis (1982) (69)
Hyperfine and PT-odd effects in YbF (1998) (66)
The Oxford electron‐beam ion trap: A device for spectroscopy of highly charged ions (1994) (65)
Discrete space theory of radiative transfer II. Stability and non-negativity (1969) (64)
Electron scattering from Ne II using the relativistic R-matrix method (1981) (62)
Variational methods for Dirac wave equations (1986) (60)
Relativistic many-body perturbation theory using analytic basis functions (1990) (60)
Relativistic atomic structure theory: Some recent work† (1984) (57)
The Dirac equation in the algebraic approximation. II. Extended basis set calculations for hydrogenic atoms (1984) (56)
Relativistic, quantum electrodynamic and many-body effects in the water molecule (1998) (56)
Discrete Space Theory of Radiative Transfer and its Application to Problems in Planetary Atmospheres (1969) (54)
Calculation of Gaunt Factors for Free–Free Transitions Near Positive Ions (1958) (52)
Solution of Radiative Transfer Problems Using the Invariant Sn Method (1968) (52)
Relativistic atomic structure calculations (1979) (52)
The Dirac equation in the algebraic approximation. I. Criteria for the choice of basis functions and minimum basis set calculations for hydrogenic atoms (1984) (49)
The Dirac equation in the algebraic approximation. VI. Molecular self-consistent field studies using basis sets of Gaussian-type functions (1988) (46)
Oscillator strength anomalies in the neon isoelectronic sequence with applications to x-ray laser modelling (1998) (38)
Studies in multiconfiguration Dirac-Fock theory. II. The even-parity low-lying spectrum of Ba I (1978) (37)
The Dirac equation in the algebraic approximation. III. Diagrammatic perturbation theory applied to a model problem (1985) (36)
Relativistic effects on interactions between heavy atoms: the HgHg potential (1977) (35)
RELATIVISTIC CALCULATION OF ATOMIC PROPERTIES (1994) (34)
Self-energy screening approximations in multi-electron atoms (2013) (34)
RELATIVISTIC CALCULATION OF ELECTROMAGNETIC INTERACTIONS IN MOLECULES (1997) (34)
A study of 5p excitation in atomic barium. II. A fully relativistic analysis of 5p excitation in atomic barium (1980) (34)
The Dirac equation in the algebraic approximation. IV. Application of the partitioning technique (1985) (34)
Multiconfiguration Dirac-Hartree-Fock Calculations with Spectroscopic Accuracy: Applications to Astrophysics (2017) (33)
Multiconfiguration Dirac-Hartree-Fock Calculations with Spectroscopic Accuracy: Applications to Astrophysics (2017) (33)
Two-dimensional fully numerical solutions of molecular Dirac equations. One-electron molecules (1984) (33)
Ab-initio calculation of the 2s2 1So-2s3p 3P1 intercombination transition in beryllium-like ions (1994) (33)
On the accuracy of Dirac-Hartree-Fock calculations using analytic basis sets (1989) (32)
Tests of QED in two-electron ions. II. The 23S-23P0,1,2 energies (1983) (32)
Spectroscopic Studies with a Multiconfiguration Dirac-Fock Program (1980) (31)
Theoretical chemistry of superheavy elements E116 and E114 (1977) (31)
Final-state intensities in photoelectron spectra of 4f electrons as predicted by relativistic calculations (1979) (31)
On the Relativistic Many-Body Perturbation Theory of Atomic and Molecular Electronic Structure (1989) (28)
Inner-shell transitions of Fe XXIII and Fe XXIV in the X-ray spectra of solar flares (1984) (28)
Partial-wave mass renormalization in atomic QED calculations (1993) (27)
Many-Electron Effects in the Theory of Nuclear Volume Isotope Shift (1980) (27)
Gauge invariance and radiative transition probabilities (1975) (26)
Fine structure of the 1s2s2p 4P degrees and 1s2p2 4P terms of the lithium isoelectronic sequence and wavelengths of transitions between them (1983) (26)
Accurate Dirac-Coulomb energies for the ground states of helium-like atoms (1990) (25)
MCDF calculations of wavelengths and radiative lifetimes in helium-like ions (1981) (25)
The representation of higher-order relativistic corrections in the MCDF-EAL method (1983) (24)
Two-dimensional fully numerical solutions of molecular dirac equations. Results for ground singlet states of H2 and HeH+ (1984) (24)
Electron scattering by Kr XXIX (oxygen-like krypton) using the Dirac R-matrix method (1991) (24)
Numerical Solution of the Radiative Transfer Equation in Spherical Shells (1973) (24)
A new program for calculating matrix elements of one-particle operators in jj-coupling (1984) (23)
Comments on relativistic two-body interaction in atoms (1984) (23)
Multiconfiguration Dirac-Fock calculations in open-shell atoms: Convergence methods and satellite spectra of the copper K alpha photoemission spectrum (2010) (23)
Tests of QED in two-electron ions. I. Methodology and 23P fine structure (1983) (23)
A general program to calculate angular momentum coefficients in relativistic atomic structure (1984) (23)
Theoretical determination of characteristic x-ray lines and the copper K alpha spectrum. (2009) (22)
The 1s2s2p2 5P-1s2p3 5S transitions in the beryllium isoelectronic sequence (1983) (22)
Studies in multiconfiguration Dirac–Fock theory. Part 3.—Interpretation of the electronic structure of neutral and ionized states of uranium (1978) (22)
Relativistic Electronic Structure of Atoms and Molecules (1994) (21)
CESD97 — A revised version to expandjj-coupled symmetry functions into determinants (1997) (21)
Two-step autoionisation and the double ionisation anomaly in Ba I (1979) (21)
Ground-state fine structure in the boron isoelectronic sequence (1984) (20)
MCDHF and RCI calculations of energy levels, lifetimes and transition rates for 3l3l ', 3l4l ', and 3s5l states in Ca IX - As XXII and Kr XXV (2017) (20)
B-spline methods for radial Dirac equations (2009) (19)
Ab initio determination of satellite intensities in transition-metal photoemission spectroscopy using a multiconfiguration framework (2011) (19)
Atomic self-energy calculations using partial-wave mass renormalization (1994) (19)
Comments on fine-structure intervals of the 1s22s22p5 2P state in fluorine isoelectronic sequence (1983) (19)
Diagrammatic perturbation theory: a comparison of numerical methods with basis set expansion techniques for a model problem (1985) (19)
ELECTRON SCATTERING BY FE XXII WITHIN THE DIRAC R-MATRIX APPROACH (1996) (19)
Theoretical Chemistry of the 7p series of superheavy elements. I. Atomic Structure studied by multi-configuration Dirac-Fock theory (1981) (18)
A new approach to relativistic multi-configuration quantum mechanics in titanium (2010) (18)
Solution of radiative transfer problems in planetary atmospheres (1968) (18)
The Dirac operator on a finite domain and the R-matrix method (2008) (18)
Spectral Line Formation in Extended Stellar Atmospheres (1972) (17)
On the ab initio calculation of the 5S2o-3PJe intercombination transitions in P II: relativity and electron relaxation (1994) (17)
Incidence of Relativistic Effects in Atoms (1983) (16)
Tests of QED in two-electron ions. IV. A status report (1984) (16)
Characterization of the copper Kβ x-ray emission profile: an ab initio multi-configuration Dirac–Hartree–Fock approach with Bayesian constraints (2016) (16)
Spin asymmetries in low-energy electron scattering from cesium atoms (1999) (16)
Ab initio MCDHF calculations of electron–nucleus interactions (2015) (15)
Nuclear quadrupole moment of scandium (1997) (15)
The 6s26p and 6s6p2 resonances in electron scattering by neutral Hg (1992) (15)
DIRAC R-MATRIX MODELING OF SPIN-INDUCED ASYMMETRY IN THE SCATTERING OF POLARIZED ELECTRONS FROM POLARIZED CESIUM ATOMS (1997) (15)
On the relativistic electron-electron interaction (1987) (14)
MULTICONFIGURATION DIRAC-FOCK CALCULATIONS OF THE HYPERFINE STRUCTURE CONSTANTS AND DETERMINATION OF THE NUCLEAR QUADRUPOLE MOMENT OF YTTRIUM 90 (1998) (14)
LARGE-SCALE MULTICONFIGURATIONAL DIRAC-FOCK CALCULATIONS OF THE HYPERFINE-STRUCTURE CONSTANTS AND DETERMINATION OF THE NUCLEAR QUADRUPOLE MOMENT OF 49 TI (1999) (14)
Combining Multiconfiguration and Perturbation Methods: Perturbative Estimates of Core–Core Electron Correlation Contributions to Excitation Energies in Mg-Like Iron (2017) (14)
Accurate multiconfiguration calculations of energy levels, lifetimes, and transition rates for the silicon isoelectronic sequence - Ti IX – Ge XIX, Sr XXV, Zr XXVII, Mo XXIX (2016) (14)
Tests of quantum electrodynamics for two-electron ions (1982) (13)
A class of Bessel function integrals with application in particle physics (1993) (13)
Convergence of the Breit interaction in self-consistent and configuration-interaction approaches (2014) (13)
MCDF calculation of wavelengths and intensities of satellite lines in lithium- like ions (1982) (13)
Correlations and level statistics in complex spectra (1995) (12)
High-accuracy reconstruction of titanium x-ray emission spectra, including relative intensities, asymmetry and satellites, and ab initio determination of shake magnitudes for transition metals (2013) (12)
Electron scattering by Se XXV (neon-like selenium) using the Dirac R-matrix method (1991) (12)
SOFTWARE FOR RELATIVISTIC ATOMIC THEORY : THE GRASP PROJECT AT OXFORD (1991) (12)
The relation between successive atomic ionization potentials (1978) (12)
Relativistic atomic structure: past, present and future (2010) (12)
Wavelengths and radiative transition rates for selected lines of 2-, 3- and 4-electron systems for the elements from Ca to Cu (1984) (12)
Relativistic Electronic Structure Theory (1992) (11)
A program for the complete expansion of jj-coupled symmetry functions into Slater determinants (1995) (11)
The Kβ X-ray emission spectrum of argon: a theoretical account (1984) (11)
On the interpretation of Hund's rules in atomic spectra (1977) (11)
A program to calculate a general recoupling coefficient (1973) (11)
Phase conventions, quasi-spin and the jj-LS transformation coefficients (1982) (10)
CFPJJ—Fractional parentage coefficients for equivalent electrons in jj-coupling (1984) (10)
RELATIVISTIC CALCULATION OF TRANSITION PROBABILITIES FOR 557.7 nm AND 297.2 nm EMISSION LINES IN OXYGEN (2013) (9)
Numerical Approximations in Radiative Transfer (1962) (9)
Large-scale calculations of atomic level and transition properties in the aluminum isoelectronic sequence from Ti X through Kr XXIV, Xe XLII, and W LXII (2017) (9)
Formulation of the Relativistic N-Electron Problem (1983) (8)
A plain man's view of the muffin-tin approximation in molecular calculations, and the solid state (1976) (8)
Relativistic atomic structure and electron–atom collisions (1991) (8)
Current developments in the relativistic quantum mechanics of atoms and molecules (1986) (8)
Numerical computation of molecular integrals via optimized (vectorized) FORTRAN code (1997) (7)
Relativistic configuration-interaction approach to the elastic low-energy scattering of electrons from atoms (1995) (7)
Tests of QED in two-electron ions. III. α6mc2 corrections (1983) (7)
Theory of (d, p) and (d, n) Reactions II: Coulomb Corrections and Numerical Results (1955) (7)
Bertha — 4-Component Relativistic Molecular Quantum Mechanics (2002) (7)
PROGRESS WITH BERTHA: A RELATIVISTIC ATOMIC AND MOLECULAR STRUCTURE PACKAGE (2006) (7)
On the accuracy of the Breit-Pauli approximation for fine-structure intervals in light atoms: significance for molecular calculations (1984) (7)
Studies in multiconfiguration Dirac-Fock theory. IV. The low-lying spectrum of bismuth I (1978) (7)
On the representation of frequency dependence in non-grey radiative transfer (1965) (7)
Anomalous satellite intensity discrepancy in copper x-ray lines (2012) (7)
A multiconfiguration Dirac-Fock calculation of parity non-conservation in atoms (1985) (7)
Analysis of fine-structure excitation energies in Dirac-Fock and perturbation theories (1982) (6)
The 23S-23PJ, J=0,1,2 intervals in neutral helium (1983) (6)
The 6s26p3 resonances in electron scattering by neutral Pb (1992) (6)
Numerical analysis of discrete ordinate methods (1968) (5)
A program for generating complete active spaces for relativistic atomic structure calculations (1993) (5)
Inclusion of the electron anomaly in effective Hamiltonians for perturbative (Breit-Pauli) and non-perturbative approaches to fine structure (1985) (5)
Chapter 3 - Relativistic Self-Consistent Fields (2002) (5)
Self-Consistency and Numerical Problems (1983) (5)
Advanced ab initio relativistic calculations of transition probabilities for some O i and O iii emission lines (2014) (5)
Radiative transfer in a rayleigh scattering atmosphere (1968) (5)
The Hartree-Fock method for atoms. A numerical approach: Charlotte Froese Fischer, John Wiley and Sons, Inc., 1977. pp. xi + 308. Price: £17.20/$29.00 (1978) (5)
Relativistic atomic structure calculations for highly ionized atoms (1985) (5)
Conventional and unconventional techniques in quantum chemistry (2004) (4)
Lifetimes of some2s22p 2P3/2states from variational theory (2016) (4)
Theory of (d, p) and (d, n) Reactions I: General Theory Ignoring Coulomb Effects (1954) (4)
An Introduction to Relativistic Theory as Implemented in GRASP (2022) (3)
A program to calculate angular momentum coefficients in relativistic atomic structure — Revised version (1984) (3)
Transport theory. Atlas Symposium No. 3: Proceedings of the symposium on interdisciplinary applications of transport theory. Oxford, England, 1 - 4 September 1970. (1971) (3)
Techniques for Open Shell Calculations for Atoms (1983) (3)
Fine-structure splittings in the boron and fluorine isoelectronic sequences: comparison of perturbative (Breit-Pauli) and non-perturbative (MCDF-EAL) predictions (1985) (3)
MCBP - A program to calculate angular coefficients of the breit interaction between electrons in the low energy limit (1984) (2)
Relativistic Radiative Transitions (1957) (2)
Invariant Imbedding and Time-Dependent Transport Processes (Modern Analytic and Computational Methods in Science and Mathematics, Volume Two) (1966) (2)
Notes on basis sets for relativistic atomic structure and QED (2008) (2)
Spectral Line Formation in Extended Atmospheres–II (1973) (2)
A numerical method for solving the radiative transfer equation in two- dimensional X-Y geometry (1974) (2)
Angular coefficients in large-scale atomic structure calculations (2004) (2)
Electron self-energy corrections using the Welton concept for atomic structure calculations (2022) (1)
Session on relativistic calculations for many-electron atoms (1985) (1)
The diffuse reflection of radiation by model planetary atmospheres (1966) (1)
HYPERFINE AND PT-ODD EFFECTS IN YBF 2SIGMA (1998) (1)
Many-body atomic physics: Electron scattering from atomic targets: application of Dirac R -matrix theory (1998) (1)
On the Accuracy of the Algebraic Approximation in Relativistic Electronic Structure Calculations (1989) (1)
GRASP: The Future? (2022) (1)
Software for relativistic atomic structure theory: The grasp project at oxford (2008) (1)
Comments on Sucher's talk (1985) (1)
Parameter-free renormalization in the self-mass correction computation (1993) (1)
Erratum: A new approach to relativistic multi-configuration quantum mechanics in titanium (Physics Letters, Section A: General, Atomic and Solid State Physics (2010) 374:47 (4756)) (2013) (0)
GRASP: General-purpose Relativistic Atomic Structure Package (2016) (0)
Program to calculate pure angular momentum coeﬃcients in jj –coupling (2022) (0)
Relativistic Basis Set Methods (2005) (0)
VizieR Online Data Catalog: Silicon isoelectronic sequence data (Jonsson+, 2016) (2015) (0)
VizieR Online Data Catalog: Mg-like ions energy levels (Gustafsson+, 2017) (2016) (0)
Erratum to "A new approach to relativistic multi-configuration quantum mechanics in titanium" (Phys. Lett. A 374 (47) (2010) 4756) (2013) (0)
Group theory and electronic states (1975) (0)
Relativistic effects in heavy-element chemistry and physics. Proceedings European Research Conference (1999) (0)
A Numerical Treatment of One-dimensional Models of Radiative Heat Transfer in Co-current Tube Furnaces (1974) (0)
Ab initio determination of Kα line strengths and energies in transition metal atoms (2012) (0)
Theory of high‐Z atoms: Principles and practice (2008) (0)
PROGRESS WITH BERTHA: A RELATIVISTIC ATOMIC (2006) (0)
Particle Transfer (1970) (0)
Lifetimes of some 2s22p 2P3=2 states from variational theory | NIST (2016) (0)
Comparison of Discrete Space and Differential Equation Methods in Non-Lte Transfer Problems (1970) (0)
Comments on Bottcher’s talk (2008) (0)

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What Schools Are Affiliated With Ian Philip Grant?

Ian Philip Grant is affiliated with the following schools:

University of Oxford