Kenneth Ruud

18.8k total citations · 2 hit papers
330 papers, 13.8k citations indexed

About

Kenneth Ruud is a scholar working on Atomic and Molecular Physics, and Optics, Spectroscopy and Physical and Theoretical Chemistry. According to data from OpenAlex, Kenneth Ruud has authored 330 papers receiving a total of 13.8k indexed citations (citations by other indexed papers that have themselves been cited), including 243 papers in Atomic and Molecular Physics, and Optics, 159 papers in Spectroscopy and 63 papers in Physical and Theoretical Chemistry. Recurrent topics in Kenneth Ruud's work include Advanced Chemical Physics Studies (160 papers), Spectroscopy and Quantum Chemical Studies (124 papers) and Molecular spectroscopy and chirality (87 papers). Kenneth Ruud is often cited by papers focused on Advanced Chemical Physics Studies (160 papers), Spectroscopy and Quantum Chemical Studies (124 papers) and Molecular spectroscopy and chirality (87 papers). Kenneth Ruud collaborates with scholars based in Norway, Sweden and Denmark. Kenneth Ruud's co-authors include Trygve Helgaker, Michał Jaszuński, Sonia Coriani, Per‐Olof Åstrand, Keld L. Bak, Peter R. Taylor, Poul Jørgensen, Jeppe Olsen, Luca Frediani and Antonio Rizzo and has published in prestigious journals such as Chemical Reviews, Journal of the American Chemical Society and Angewandte Chemie International Edition.

In The Last Decade

Kenneth Ruud

327 papers receiving 13.6k citations

Hit Papers

align trajectories

What are hit papers?

Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies if it has ≥500 total citations, achieves ≥1.5× the top-1% citation threshold for papers in the same subfield and year (this is the minimum needed to enter the top 1%, not the average within it), or reaches the top citation threshold in at least one of its specific research topics.

Ab Initio Methods for the Calculation of NMR Shielding and Indirect Spin−Spin Coupling Constants

1998 1.2k citations Trygve Helgaker, Michał Jaszuński et al. profile →
Recent Advances in Wave Function-Based Methods of Molecular-Property Calculations

2012 528 citations Trygve Helgaker, Kenneth Ruud et al. profile →

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name	h						Papers	Cites
Kenneth Ruud Norway	62	8.1k	7.1k	2.7k	2.6k	2.2k	330	13.8k
Jeppe Olsen Denmark	58	13.3k 1.6×	4.8k 0.7×	3.2k 1.2×	1.9k 0.7×	2.9k 1.3×	192	16.9k
Ove Christiansen Denmark	64	10.2k 1.3×	3.9k 0.6×	2.6k 0.9×	1.3k 0.5×	3.9k 1.8×	215	13.6k
Frank Jensen Denmark	55	5.9k 0.7×	3.4k 0.5×	3.5k 1.3×	4.4k 1.7×	2.1k 0.9×	224	14.0k
Christof Hättig Germany	56	9.1k 1.1×	3.1k 0.4×	4.1k 1.5×	2.7k 1.0×	4.5k 2.0×	201	14.8k
Mark A. Johnson United States	67	10.5k 1.3×	6.4k 0.9×	2.4k 0.9×	1.2k 0.5×	2.5k 1.1×	386	17.4k
Anna I. Krylov United States	70	11.1k 1.4×	3.0k 0.4×	3.0k 1.1×	1.9k 0.8×	4.1k 1.8×	298	16.0k
Roland Lindh Sweden	59	7.7k 1.0×	2.6k 0.4×	5.3k 1.9×	2.4k 0.9×	3.2k 1.5×	200	15.8k
Henrik Koch Norway	51	12.7k 1.6×	4.4k 0.6×	2.9k 1.1×	1.9k 0.8×	3.7k 1.7×	189	15.8k
David P. Tew United Kingdom	38	6.8k 0.8×	3.1k 0.4×	6.3k 2.3×	4.2k 1.6×	3.9k 1.8×	122	17.5k
A. D. Buckingham United Kingdom	64	9.9k 1.2×	7.8k 1.1×	2.1k 0.8×	1.8k 0.7×	2.5k 1.1×	276	15.3k

Countries citing papers authored by Kenneth Ruud

Since Specialization

Citations

This map shows the geographic impact of Kenneth Ruud'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 Kenneth Ruud with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Kenneth Ruud more than expected).

Fields of papers citing papers by Kenneth Ruud

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Kenneth Ruud. 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 Kenneth Ruud. The network helps show where Kenneth Ruud may publish in the future.

Co-authorship network of co-authors of Kenneth Ruud

This figure shows the co-authorship network connecting the top 25 collaborators of Kenneth Ruud. A scholar is included among the top collaborators of Kenneth Ruud 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 Kenneth Ruud. Kenneth Ruud is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

Sort: Min cites: Since: Top N: Style:

20 of 20 papers shown

Ruud, Kenneth, et al.. (2025). Workflow for Harmonic IR and Raman Spectra of Embedded Systems: The PE-QM Approach. The Journal of Physical Chemistry A. 129(30). 6896–6910.

Repiský, Michal, et al.. (2024). Electric field gradients at the nuclei from all-electron four-component relativistic density functional theory using Gaussian-type orbitals. Physical review. B.. 110(4). 2 indexed citations

Beerepoot, Maarten T. P., Magnus Ringholm, Simen Reine, et al.. (2021). Harmonic Infrared and Raman Spectra in Molecular Environments Using the Polarizable Embedding Model. Journal of Chemical Theory and Computation. 17(6). 3599–3617. 11 indexed citations

Repiský, Michal, Stanislav Komorovský, Marius Kadek, et al.. (2020). ReSpect: Relativistic spectroscopy DFT program package. The Journal of Chemical Physics. 152(18). 184101–184101. 99 indexed citations

Alam, Md. Mehboob, Ramprasad Misra, & Kenneth Ruud. (2017). Interplay of twist angle and solvents with two-photon optical channel interference in aryl-substituted BODIPY dyes. Physical Chemistry Chemical Physics. 19(43). 29461–29471. 16 indexed citations

Steindal, Arnfinn Hykkerud, Maarten T. P. Beerepoot, Magnus Ringholm, et al.. (2016). Open-ended response theory with polarizable embedding: multiphoton absorption in biomolecular systems. Physical Chemistry Chemical Physics. 18(40). 28339–28352. 21 indexed citations

Friese, Daniel H., Alexander Mikhaylov, Maciej Krzeszewski, et al.. (2015). Pyrrolo[3,2‐b]pyrroles—From Unprecedented Solvatofluorochromism to Two‐Photon Absorption. Chemistry - A European Journal. 21(50). 18364–18374. 104 indexed citations

Alam, Md. Mehboob, Mausumi Chattopadhyaya, Swapan Chakrabarti, & Kenneth Ruud. (2013). Effect of donor–acceptor orientation on solvent-dependent three-photon activity in through-space charge-transfer systems – case study of [2,2]-paracyclophane derivatives. Physical Chemistry Chemical Physics. 15(40). 17570–17570. 8 indexed citations

Ågren, Hans, et al.. (2012). Hyper Raman spectra calculated in a time-dependent Hartree–Fock method. Molecular Physics. 110(19-20). 2315–2320. 5 indexed citations

10.

Hanssen, Kine Ø., Bruno Schuler, Antony Williams, et al.. (2012). A Combined Atomic Force Microscopy and Computational Approach for the Structural Elucidation of Breitfussin A and B: Highly Modified Halogenated Dipeptides from Thuiaria breitfussi. Angewandte Chemie International Edition. 51(49). 12238–12241. 90 indexed citations

11.

Lin, Na, Yi Luo, Kenneth Ruud, et al.. (2011). Differences in Two‐Photon and One‐Photon Absorption Profiles Induced by Vibronic Coupling: The Case of Dioxaborine Heterocyclic Dye. ChemPhysChem. 12(17). 3392–3403. 27 indexed citations

12.

Guillaume, Maxime, et al.. (2010). Computational Study of the One- and Two-Photon Absorption and Circular Dichroism of (l)-Tryptophan. The Journal of Physical Chemistry B. 114(19). 6500–6512. 39 indexed citations

13.

Rizzo, Antonio, et al.. (2009). Jones and magnetoelectric birefringence of pure substances — A computational study. Canadian Journal of Chemistry. 87(10). 1352–1361. 4 indexed citations

14.

Chakrabarti, Swapan & Kenneth Ruud. (2009). Large two-photon absorption cross section: molecular tweezer as a new promising class of compounds for nonlinear optics. Physical Chemistry Chemical Physics. 11(15). 2592–2592. 44 indexed citations

15.

Ruud, Kenneth & Riccardo Zanasi. (2005). The Importance of Molecular Vibrations: The Sign Change of the Optical Rotation of Methyloxirane. Angewandte Chemie. 117(23). 3660–3662. 19 indexed citations

16.

Pecul, Magdalena & Kenneth Ruud. (2004). Solvent effects on the spin–spin coupling constants of acetylene revisited: supermolecular and polarizable continuum model calculations. Magnetic Resonance in Chemistry. 42(S1). S128–S137. 24 indexed citations

17.

Jaszuński, Michał, Kenneth Ruud, & Trygve Helgaker. (2003). Density-functional theory calculation of the nuclear magnetic resonance indirect nuclear spin—spin coupling constants in C ₆₀. Molecular Physics. 101(13). 1997–2002. 16 indexed citations

18.

Rizzo, Antonio, Kenneth Ruud, & David M. Bishop. (2002). Interatomic interactions and the Cotton—Mouton effect for helium. Molecular Physics. 100(6). 799–807. 15 indexed citations

19.

Luo, Yi, Daniel Jönsson, Patrick Norman, et al.. (1998). Some recent developments of high-order response theory. International Journal of Quantum Chemistry. 70(1). 219–239. 29 indexed citations

20.

Helgaker, Trygve, Michał Jaszuński, & Kenneth Ruud. (1998). Full Cl calculations of magnetic properties of the H2 molecule in the B(1)Sigma(+)-u state. Polish Journal of Chemistry. 72(7). 1405–1410. 3 indexed citations

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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