Keld L. Bak

5.3k total citations
47 papers, 3.1k citations indexed

About

Keld L. Bak is a scholar working on Atomic and Molecular Physics, and Optics, Spectroscopy and Physical and Theoretical Chemistry. According to data from OpenAlex, Keld L. Bak has authored 47 papers receiving a total of 3.1k indexed citations (citations by other indexed papers that have themselves been cited), including 40 papers in Atomic and Molecular Physics, and Optics, 30 papers in Spectroscopy and 7 papers in Physical and Theoretical Chemistry. Recurrent topics in Keld L. Bak's work include Advanced Chemical Physics Studies (30 papers), Spectroscopy and Quantum Chemical Studies (19 papers) and Molecular spectroscopy and chirality (12 papers). Keld L. Bak is often cited by papers focused on Advanced Chemical Physics Studies (30 papers), Spectroscopy and Quantum Chemical Studies (19 papers) and Molecular spectroscopy and chirality (12 papers). Keld L. Bak collaborates with scholars based in Denmark, Norway and United States. Keld L. Bak's co-authors include Trygve Helgaker, Poul Jørgensen, Jeppe Olsen, Kenneth Ruud, Poul Jo rgensen, Hans Jørgen Aa. Jensen, Jürgen Gauß, Wim Klopper, Stephan P. A. Sauer and John F. Stanton and has published in prestigious journals such as Journal of the American Chemical Society, The Journal of Chemical Physics and The Journal of Physical Chemistry.

In The Last Decade

Keld L. Bak

46 papers receiving 3.0k citations

Peers

Keld L. Bak

AMPO

SPECT

PTC

Antonio Rizzo Italy

Michał Jaszuński Poland

Paolo Palmieri Italy

A.J. Barnes United Kingdom

D. J. DeFrees United States

Jacek Koput Poland

Jeanne G. C. M. van Duijneveldt-van de Rijdt Netherlands

Berta Fernández Spain

Satoshi Yabushita Japan

Petr Čárský Czechia

Antonio Rizzo Italy

Keld L. Bak

2.3k ×1.0

AMPO

1.7k ×1.1

SPECT

522 ×0.9

568 ×1.2

501 ×1.2

PTC

Citations per year, relative to Keld L. Bak Keld L. Bak (= 1×) peers Antonio Rizzo

Countries citing papers authored by Keld L. Bak

Since Specialization

Citations

This map shows the geographic impact of Keld L. Bak's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by Keld L. Bak with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Keld L. Bak more than expected).

Fields of papers citing papers by Keld L. Bak

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Keld L. Bak. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by Keld L. Bak. The network helps show where Keld L. Bak may publish in the future.

Co-authorship network of co-authors of Keld L. Bak

This figure shows the co-authorship network connecting the top 25 collaborators of Keld L. Bak. A scholar is included among the top collaborators of Keld L. Bak based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with Keld L. Bak. Keld L. Bak is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

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20 of 20 papers shown

Sauer, Stephan P. A., Ivana Paidarová, Jens Oddershede, Keld L. Bak, & J. F. Ogilvie. (2010). Calculated rotational and vibrational g factors of LiH X ¹Σ⁺ and evaluation of parameters in radial functions from rotational and vibration‐rotational spectra. International Journal of Quantum Chemistry. 111(4). 736–752. 4 indexed citations

Bak, Keld L., et al.. (2005). The vibrational g-factor of dihydrogen from theoretical calculation and analysis of vibration-rotational spectra. Physical Chemistry Chemical Physics. 7(8). 1747–1747. 18 indexed citations

Åstrand, Per‐Olof, Keld L. Bak, & Stephan P. A. Sauer. (2001). Ab initio calculations on 2-imidazolyl-2-thiazolyl azo compounds – an investigation of potential near-infrared absorbing structures. Chemical Physics Letters. 343(1-2). 171–177. 11 indexed citations

Bak, Keld L., Asger Halkier, Poul Jørgensen, et al.. (2001). Chemical accuracy from ‘Coulomb hole’ extrapolated molecular quantum-mechanical calculations. Journal of Molecular Structure. 567-568. 375–384. 37 indexed citations

Bak, Keld L., Poul Jørgensen, Jeppe Olsen, Trygve Helgaker, & Wim Klopper. (2000). Accuracy of atomization energies and reaction enthalpies in standard and extrapolated electronic wave function/basis set calculations. The Journal of Chemical Physics. 112(21). 9229–9242. 209 indexed citations

Klopper, Wim, Keld L. Bak, Poul Jørgensen, Jeppe Olsen, & Trygve Helgaker. (1999). Highly accurate calculations of molecular electronic structure. Journal of Physics B Atomic Molecular and Optical Physics. 32(13). R103–R130. 194 indexed citations

Christiansen, Ove, Keld L. Bak, Henrik Koch, & Stephan P. A. Sauer. (1998). A second-order doubles correction to excitation energies in the random-phase approximation. Chemical Physics Letters. 284(1-2). 47–55. 35 indexed citations

Hansen, Aage E., Kurt V. Mikkelsen, & Keld L. Bak. (1997). Pictorial Representations of Molecular Response Tensors: Nuclear Schielding, Magnetizability, and Polarizability. Research at the University of Copenhagen (University of Copenhagen). 133–162.

Ashvar, C. S., F. J. Devlin, Keld L. Bak, Peter R. Taylor, & Philip J. Stephens. (1996). Ab Initio Calculation of Vibrational Absorption and Circular Dichroism Spectra: 6,8-Dioxabicyclo[3.2.1]octane. The Journal of Physical Chemistry. 100(22). 9262–9270. 36 indexed citations

10.

Bludský, Ota, Keld L. Bak, Poul Jo rgensen, & V. S̆pirko. (1995). Ab initio calculations of anharmonic vibrational transition intensities of trans-2,3-dideuteriooxirane. The Journal of Chemical Physics. 103(23). 10110–10115. 21 indexed citations

11.

Olsen, Jeppe, Keld L. Bak, Kenneth Ruud, Trygve Helgaker, & Poul J�rgensen. (1995). Orbital connections for perturbation-dependent basis sets. Theoretical Chemistry Accounts. 90(5-6). 421–439. 71 indexed citations

12.

Bak, Keld L., F. J. Devlin, C. S. Ashvar, et al.. (1995). Ab Initio Calculation of Vibrational Circular Dichroism Spectra Using Gauge-Invariant Atomic Orbitals. The Journal of Physical Chemistry. 99(41). 14918–14922. 40 indexed citations

13.

Ruud, Kenneth, Trygve Helgaker, Keld L. Bak, Poul Jørgensen, & Jeppe Olsen. (1995). Accurate magnetizabilities of the isoelectronic series BeH−, BH, and CH+. The MCSCF-GIAO approach. Chemical Physics. 195(1-3). 157–169. 73 indexed citations

14.

Bak, Keld L., Aage E. Hansen, Kenneth Ruud, et al.. (1995). Ab initio calculation of electronic circular dichroism fortrans-cyclooctene using London atomic orbitals. Theoretical Chemistry Accounts. 90(5-6). 441–458. 54 indexed citations

15.

Ruud, Kenneth, Trygve Helgaker, Jeppe Olsen, Paul C. Jorgensen, & Keld L. Bak. (1995). A numerically stable orbital connection for the calculation of analytical Hessians using perturbation-dependent basis sets. Chemical Physics Letters. 235(1-2). 47–52. 27 indexed citations

16.

Ruud, Kenneth, Trygve Helgaker, Rika Kobayashi, et al.. (1994). Multiconfigurational self-consistent field calculations of nuclear shieldings using London atomic orbitals. The Journal of Chemical Physics. 100(11). 8178–8185. 215 indexed citations

17.

Ruud, Kenneth, Trygve Helgaker, Poul Jørgensen, & Keld L. Bak. (1994). An ab initio nuclear magnetic resonance spectrum of vinyllithium. Chemical Physics Letters. 226(1-2). 1–10. 14 indexed citations

18.

Jaszuński, Michał, Trygve Helgaker, Kenneth Ruud, Keld L. Bak, & Poul Jørgensen. (1994). MCSCF calculations of nitrogen NMR shielding constants using London atomic orbitals. Chemical Physics Letters. 220(3-5). 154–160. 17 indexed citations

19.

Ruud, Kenneth, Trygve Helgaker, Poul Jørgensen, & Keld L. Bak. (1994). Theoretical calculations of the magnetizability of some small fluorine-containing molecules using London atomic orbitals. Chemical Physics Letters. 223(1-2). 12–18. 30 indexed citations

20.

Bak, Keld L., Jerry A. Boatz, & Jack Simons. (1991). First‐Order geometrical response equations for state‐averaged multiconfigurational self‐consistent field (SA‐MCSCF) wave functions. International Journal of Quantum Chemistry. 40(3). 361–378. 14 indexed citations

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