Trygve Helgaker

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Jeppe OlsenVerified email at chem.au.dk
Kenneth RuudHylleraas Centre for Quantum Molecular Sciences, University of Tromsø-The Arctic University ofVerified email at uit.no
Wim KlopperProfessor für Theoretische Chemie, Karlsruher Institut für TechnologieVerified email at kit.edu
Hans Jørgen Aagaard JensenDepartment of Physics, Chemistry and Pharmacy; University of Southern DenmarkVerified email at sdu.dk
Henrik KochNorwegian University of Science and TechnologyVerified email at ntnu.no
Sonia CorianiDepartment of Chemistry, Technical University of DenmarkVerified email at kemi.dtu.dk
Keld Lars BakAssociate Professor, Aarhus UniversityVerified email at ase.au.dk
Michal JaszunskiVerified email at icho.edu.pl
Andrew M. Wibowo-TealeProfessor, University of NottinghamVerified email at nottingham.ac.uk
hans agrenDepartment of Physics and Astronomy, Uppsala UniversityVerified email at physics.uu.se
Jürgen GaussProfessor of theoretical chemistry, Johannes Gutenberg-Universität MainzVerified email at uni-mainz.de
David J TozerDepartment of Chemistry, Durham UniversityVerified email at durham.ac.uk
Ove ChristiansenDepartment of Chemistry, Aarhus UniversityVerified email at chem.au.dk
Kurt V. MikkelsenProfessor of Theoretical Chemistry, Department of Chemistry, University of CopenhagenVerified email at chem.ku.dk
Einar UggerudProfessor of Chemistry, University of OsloVerified email at kjemi.uio.no
Antonio RizzoCNR-IPCF Pisa UnitVerified email at ipcf.cnr.it
Magdalena PeculVerified email at uw.edu.pl
Michael J G PeachLecturer in Chemistry, Lancaster UniversityVerified email at lancaster.ac.uk
Trond SaueResearcher, Laboratoire de Chimie et Physique Quantiques, CNRS/Université de ToulouseVerified email at irsamc.ups-tlse.fr
Filip PawlowskiAuburn UniversityVerified email at auburn.edu

Trygve Helgaker

Other namesTrygve Ulf Helgaker

University of Oslo

Verified email at kjemi.uio.no - Homepage

Chemistry theoretical chemistry quantum chemistry molecular electronic structure molecular properties


Title Sort by citations Sort by year Sort by title	Cited by Cited by	Year
Molecular electronic-structure theory T Helgaker, P Jorgensen, J Olsen John Wiley & Sons, 2013	4697	2013
Basis-set convergence of correlated calculations on water T Helgaker, W Klopper, H Koch, J Noga The Journal of chemical physics 106 (23), 9639-9646, 1997	2784	1997
Basis-set convergence in correlated calculations on Ne, N2, and H2O A Halkier, T Helgaker, P Jørgensen, W Klopper, H Koch, J Olsen, ... Chemical Physics Letters 286 (3-4), 243-252, 1998	2357	1998
Ab initio methods for the calculation of NMR shielding and indirect spin-spin coupling constants T Helgaker, M Jaszunski, K Ruud Chemical Reviews 99, 293-352, 1999	1712	1999
Excitation energies in density functional theory: An evaluation and a diagnostic test MJG Peach, P Benfield, T Helgaker, DJ Tozer The Journal of chemical physics 128 (4), 2008	1483	2008
The Dalton quantum chemistry program system K Aidas, C Angeli, KL Bak, V Bakken, R Bast, L Boman, O Christiansen, ... Wiley Interdisciplinary Reviews: Computational Molecular Science 4 (3), 269-284, 2014	1481	2014
Basis-set convergence of the energy in molecular Hartree–Fock calculations A Halkier, T Helgaker, P Jørgensen, W Klopper, J Olsen Chemical Physics Letters 302 (5-6), 437-446, 1999	757	1999
Recent advances in wave function-based methods of molecular-property calculations T Helgaker, S Coriani, P Jørgensen, K Kristensen, J Olsen, K Ruud Chemical reviews 112 (1), 543-631, 2012	720	2012
Excitation energies from the coupled cluster singles and doubles linear response function (CCSDLR). Applications to Be, CH⁺, CO, and H₂O H Koch, HJA Jensen, P Jørgensen, T Helgaker Journal of Chemical Physics 93 (5), 3345-3350, 1990	629	1990
Assessment of a Coulomb-attenuated exchange–correlation energy functional MJG Peach, T Helgaker, P Sałek, TW Keal, OB Lutnæs, DJ Tozer, ... Physical Chemistry Chemical Physics 8 (5), 558-562, 2006	525	2006
The CC3 model: An iterative coupled cluster approach including connected triples H Koch, O Christiansen, P Jo/rgensen, AM Sanchez de Merás, T Helgaker The Journal of chemical physics 106 (5), 1808-1818, 1997	519	1997
Analytical calculation of nuclear magnetic resonance indirect spin–spin coupling constants at the generalized gradient approximation and hybrid levels of density-functional theory T Helgaker, M Watson, NC Handy The Journal of Chemical Physics 113 (21), 9402-9409, 2000	445	2000
Basis set convergence of the interaction energy of hydrogen-bonded complexes A Halkier, W Klopper, T Helgaker, P Jo/rgensen, PR Taylor The Journal of chemical physics 111 (20), 9157-9167, 1999	444	1999
Density-functional theory of linear and nonlinear time-dependent molecular properties P Sałek, O Vahtras, T Helgaker, H Ågren The Journal of chemical physics 117 (21), 9630-9645, 2002	426	2002
The accurate determination of molecular equilibrium structures KL Bak, J Gauss, P Jørgensen, J Olsen, T Helgaker, JF Stanton The Journal of Chemical Physics 114 (15), 6548-6556, 2001	416	2001
The prediction of molecular equilibrium structures by the standard electronic wave functions T Helgaker, J Gauss, P Jo/rgensen, J Olsen The Journal of chemical physics 106 (15), 6430-6440, 1997	409	1997
An electronic Hamiltonian for origin independent calculations of magnetic properties T Helgaker, P Jo/rgensen The Journal of chemical physics 95 (4), 2595-2601, 1991	404	1991
DALTON, a molecular electronic structure program T Helgaker, HJA Jensen, P Jørgensen, J Olsen, K Ruud, H Ågren, ... Release 1, 63, 2001	351	2001
Integration of the classical equations of motion on ab initio molecular potential energy surfaces using gradients and Hessians: application to translational energy release upon … T Helgaker, E Uggerud, HJA Jensen Chemical Physics Letters 173 (2-3), 145-150, 1990	329	1990
The quantum-chemical calculation of NMR indirect spin–spin coupling constants T Helgaker, M Jaszuński, M Pecul Progress in Nuclear Magnetic Resonance Spectroscopy 53 (4), 249-268, 2008	314	2008

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