Klavs HANSEN-量子交叉研究中心

Klavs Hansen Professor of Physics

Office: Room 147, Building 32

Email: klavshansen@tju.edu.cn

Research Areas: Quantum Effects in Finite Systems, Statistical Physics of Nanoparticles

Courses in Charge: Atomic Physics

Address: Yaguan Road 135, Jinnan District, 300350 Tianjin, P. R. China

Biographical Profile

Educational Background

Masters degree work 9/1983 - 11/1986 in theoretical high energy physics at the Niels Bohr Institute, Copenhagen, Denmark, supervised by Holger Bech Nielsen. Cand. Scient. degree 11/1986.
Ph.D. degree 4/1991 with thesis ’An Experimental Study of Electronic Shell Structure in Large Sodium Clusters’.

Professional Career

Postdoc, Department of Chemistry, University of California, Los Angeles, 8/1991-8/1992.
Research Assistant Professor, Niels Bohr Institute, University of Copenhagen, 8/1992-1/1995.
Research Scientist at the Max Born Institute, Berlin, 2/1995-11/1997.
Research Associate Professor, Institute of Physics, University of Aarhus, 12/1997- 3/1999.
Research Associate Professor, Niels Bohr Institute-Ørsted Laboratory, University of Copenhagen, 4/1999.
Research Scientist, Institute of Physics and Institute of Nuclear Chemistry, Johannes Gutenberg University, Mainz, 5/1999-9/1999.
Senior Researcher, Department of Physics, University of Jyväskylä, Jyväskylä, Finland, 10/1999-1/2003.
Associate professor (lektor) in atomic physics at Gotheburg University, Sweden, 2/2003-9/2016.

Fields of Interest

Quantal and statistical processes in nanoscale quantum systems
Thermodynamics of free clusters and the approach to thermal equilibrium Systems: Fullerenes, metal and molecular clusters, polycyclic aromatic molecules (PAHs)

Tools: Mass spectrometers, electrostatic storage rings, nano- and femtosecond lasers, theory

Selected Publications

Journal Articles, recent:

Åke Andersson, Luca Schio, Robert Richter, Michele Alagia, Stefano Stranges, Piero Ferrari, Klavs Hansen, and Vitali Zhaunerchyk :
" Single-photon hot-electron ionization of C70 ‍"
Phys. Rev. A 107, 013103 (2023)

Klavs Hansen and Henning Zettergren :
" Clusters of Fullerenes: Structures and Dynamics "
J. Phys. Chem. A 126, 8173–8187 (2022)

T. Höltzl, P. Ferrari, E. Janssens, and K. Hansen :
" Shape fluctuations and radiation from thermally excited electronic states of boron clusters "
Phys. Rev. A 106, 062826 (2022)

Shimpei Iida, Wei Hu, Rui Zhang, Piero Ferrari, Kei Masuhara, Hajime Tanuma, Haruo Shiromaru, Toshiyuki Azuma and Klavs Hansen :
" Thermal radiative cooling of carbon cluster cations C_N⁺, N = 9, 11, 12, 17–27 "
MNRAS 514, 844–851 (2022)

Jonas Wätzel, Primož Rebernik Ribič, Marcello Coreno, Miltcho B. Danailov, Christian David, Alexander Demidovich, Michele Di Fraia, Luca Giannessi, Klavs Hansen, Špela Krušič, Michele Manfredda, Michael Meyer, Andrej Mihelič, Najmeh Mirian, Oksana Plekan, Barbara Ressel, Benedikt Rösner, Alberto Simoncig, Simone Spampinati, Matija Stupar, Matjaž Žitnik, Marco Zangrando, Carlo Callegari, Jamal Berakdar, and Giovanni De Ninno :
" Light-Induced Magnetization at the Nanoscale "
Phys. Rev. Lett. 128, 157205 (2022)

John W. Niman, Benjamin S. Kamerin, Vitaly V. Kresin, Jan Krohn, Ruth Signorell, Roope Halonen and Klavs Hansen :
" Shells in CO2 clusters "
Phys. Chem. Chem. Phys. 24, 5343 (2022)

Wen Gan, Lijun Geng, Baoqi Yin, Hanyu Zhang, Zhixun Luo and Klavs Hansen :
" clotrimerization of Acetylene on Clusters Co_n⁺/Fe_n⁺/Ni_n⁺(n = 1−16) "
J. Phys. Chem. A 125, 10392−10400 (2021)

Wen Gan, Benben Huang, Mengzhou Yang, Lijun Geng, Zhixun Luo and Klavs Hansen :
" The reactivity of Nb_n⁺ clusters with acetylene and ethylene to produce a cubic aromatic metal carbide Nb₄C₄⁺ "
New J. Chem. 45, 21844 (2021)

S. Iida, S. Kuma, M. Kuriyama, T. Furukawa, M. Kusunoki, H. Tanuma, K. Hansen, H. Shiromaru, and T. Azuma :
" IR-photon quenching of delayed electron detachment from hot pentacene anions "
Phys. Rev. A 104, 043114 (2021)

Klavs Hansen :
" Decay dynamics in molecular beams "
Mass Spectrometry Reviews 40, 725–740 (2021)

Minghao Li, Zehua Sun & Klavs Hansen :
" Free energies of triply and quadruply degenerate electron ladder spectra "
Eur. Phys. J. D 75, 278 (2021)

Kristien Peeters, Ewald Janssens, Klavs Hansen, Peter Lievens, and Piero Ferrari :
" Unravelling the electronic nature of the radiative cooling of cobalt clusters "
Phys. Rev. Research 3, 033225 (2021)

Yuhan Jia, Haiming Wu, Xiaoyun Zhao, Hanyu Zhang, Lijun Geng, Hongchao Zhang, Si-Dian Li, Zhixun Luo and Klavs Hansen :
" Interactions between water and rhodium clusters: molecular adsorption versus cluster adsorption "
Nanoscale 13, 11396-11402 (2021)

Piero Ferrari and Klavs Hansen :
" Computing gold cluster energies with density functional theory: the importance of correlation "
Phys. Chem. Chem. Phys., 23, 14830-14835 (2021)

Klavs Hansen and Henning Zettergren :
Chapter 9 "Clusters of Fullerenes" of book "All-carbon Composites and Hybrids"
Page 197-230, Publisher: The Royal Society of Chemistry, (2021)

Henning Zettergren, Alicja Domaracka, […], Klavs Hansen, Annemieke Petrignani :
" Roadmap on dynamics of molecules and clusters in the gas phase "
Eur. Phys. J. D 75:152 (2021)

Klavs Hansen, Piero Ferrari :
" Vibrational angular momentum level densities of linear molecules "
Chem. Phys. Lett. 768, 138385 (2021)

K. Hansen :
" C₆₀⁻ thermal electron-emission rate "
Phys. Rev. A 102, 052823 (2020)

Hanyu Zhang, Haiming Wu, Yuhan Jia, Baoqi Yin, Lijun Geng, Zhixun Luo & Klavs Hansen :
" Hydrogen release from a single water molecule on Vn+ (3 ≤ n ≤ 30) "
COMMUNICATIONS CHEMISTRY 3 : 148 (2020)

Lukas Tiefenthaler, Siegfried Kollotzek, Michael Gatchell, Klavs Hansen, Paul Scheier and Olof Echt:
" Isotope enrichment in neon clusters grown in helium nanodroplets "
J. Chem. Phys. 153, 164305 (2020)

Giovanni De Ninno , Jonas Wätzel, Primož Rebernik Ribič , Enrico Allaria ,Marcello Coreno, Miltcho B. Danailov, Christian David, Alexander Demidovich,Michele Di Fraia, Luca Giannessi, Klavs Hansen , Špela Krušič, Michele Manfredda,Michael Meyer, Andrej Mihelič, Najmeh Mirian, Oksana Plekan, Barbara Ressel ,Benedikt Rösner, Alberto Simoncig, Simone Spampinati, Matija Stupar, Matjaž Žitnik,Marco Zangrando , Carlo Callegari and Jamal Berakdar:
" Photoelectric effect with a twist "
Nature Photonics 14, 554–558 (2020)

H T Schmidt, S Rosén, R D Thomas, M H Stockett, W D Geppert, Å Larson, P Löfgren, A Simonsson, A Källberg, P Reinhed, M Björkhage, M Blom, J D Alexander, P K Najeeb, M Ji, N Kono, E K Anderson, G Eklund, M K Kristiansson, O M Hole, D Hanstorp, H Hartman, P S Barklem, J Grumer, K Hansen, M Gatchell, H Cederquist and H Zettergren:
" Negative ion relaxation and reactions in a cryogenic storage ring "
Proceedings of ICPEAC 2019
J. Phys. Conf. Series 1412 (2020) 062006

Shimpei Iida, Susumu Kuma, Jun Matsumoto, Takeshi Furukawa, Hajime Tanuma, Toshiyuki Azuma, Haruo Shiromaru, Vitali Zhaunerchyk, and Klavs Hansen:
" Rotationally resolved excitation spectra measured by slow electron detachment from SiO₂"
J. Phys. Chem. Lett. 11 (2020) 5199-5203

Christina Kjær, Ying Zhao, Mark H. Stockett, Li Chen, Klavs Hansen and Steen Brøndsted Nielsen
" Gas-phase Förster resonance energy transfer in mass-selected ions with methylene or peptide linkers between two dyes: a concerted dance of charges "
Phys.Chem.Chem.Phys. 22, 11095 (2020)

E. K. Anderson, A. F. Schmidt-May , P. K. Najeeb , G. Eklund, K. C. Chartkunchand , S. Ros´ en, Å. Larson, K. Hansen , H. Cederquist , H. Zettergren , and H. T. Schmidt:
“ Spontaneous Electron Emission from Hot Silver Dimer Anions: Breakdown of the Born-Oppenheimer Approximation "
Phys. Rev. Lett. 124, 173001 (2020)

Mengzhou Yang, Haiming Wu, Benben Huang, Zhixun Luo, and Klavs Hansen:
" Iodization Threshold in Size-Dependent Reactions of Lead Clusters Pb_n⁺ with Iodomethane "
J. Phys. Chem. A 124, 2505−2512 (2020)

K. Hansen:
" Thermal damping of odd-even effects in gold clusters "
Chemical Physics 530 (2020) 110637

K Hansen:
" Description of unimolecular reaction rates of Lennard-Jones clusters "
J. Phys. B: At. Mol. Opt. Phys. 52 235101 (2019)

Piero Ferrari, Ewald Janssens, Peter Lievens and Klavs Hansen:
" Radiative cooling of size-selected gas phase clusters "
International Reviews in Physical Chemistry 38, 405-440 (2019)

Christopher L. Adams, Klavs Hansen, and J. Mathias Weber:
" Vibrational Autodetachment from Anionic Nitroalkane Chains - From Molecular Signatures to Thermionic Emission "
J. Phys. Chem. A 123 (2019) 8562-8570

K. Hansen, Piero Ferrari:
" More whiffs of the aromatic universe "
Physics Today 72, 9, 12 (2019)

K. Hansen, M. Ryding, E. Uggerud:
" Magic numbers and stabilities of heavy water clusters,(D₂O)_ND⁺, N=3-48 "
Int. J. Mass Spectrom. 440 (2019) 14-19

K. Hansen, A. E. K. Sundén, K. Støchkel, S. Brøndsted Nielsen, B. Dynefors:
" Non-scrambling of hydrogen in NH⁺₄ (H₂O)₃clusters "
RSC Advances 9 (2019) 6620

K. Hansen:
" The classical capture cross section of an electron and neutral and anionic polarizable molecules with permanent dipole moments "
Int. J. Mass Spectrom. 438 (2019) 142-147

F.-Q. Chen, N. Kono, R. Suzuki, T. Furukawa, H. Tanuma, P. Ferrari, T. Azuma, H. Shiromaru, V. Zhaunerchyk, K. Hansen:
" Radiative cooling of cationic carbon clusters, C_N⁺, N=8,10,13-16 "
Phys. Chem. Chem. Phys. 21 (2019) 1587-1596

N. Kono, R. Suzuki, T. Furukawa, J. Matsumoto, H. Tanuma, H. Shiromaru, T. Azuma, K. Hansen:
" Electronic and vibrational radiative cooling of the small carbon clusters C₄^- and C₆^- "
Phys. Rev. A 98 (2018) 063434

Piero Ferrari, Klavs Hansen, Peter Lievens, and Ewald Janssens:
" Stability of small cationic platinum clusters "
Phys.Chem.Chem.Phys. 20 (2018) 29085 Selected as 2018 PCCP HOT Article

E. K. Anderson, M. Kaminska, K. C. Chartkunchand, G. Eklund, M. Gatchell, K. Hansen, H. Zettergren, H. Cederquist, and H. T. Schmidt:
" Decays of excited silver cluster anions Ag_n^- n= 4 to 7 in the Double ElectroStatic Ion Ring ExpEriment "
Phys. Rev. A 98 (2018) 022705

Piero Ferrari, Jan Vanbuel, Klavs Hansen, Peter Lievens, Ewald Janssens, and André Fielicke:
" Effect of radiative cooling on the size-dependent stability of small boron clusters "
Phys. Rev. A 98 (2018) 012501

A.E.K. Sundén, K. Støchkel, P. Hvelplund, S. Brøndsted Nielsen, B. Dynefors, and K. Hansen:
" Stabilities of protonated water-ammonia clusters "
J. Chem. Phys. 148 (2018) 184306

K. Hansen:
" Action spectroscopy of highly excited molecular ions in molecular beams "
Int. J. Mass. Spectrom. 430 (2018) 14-21

K. Hansen:
" Tunneling and reflection in unimolecular reaction kinetic energy release distributions "
Chem. Phys. Lett. 693 (2018) 66-71

M. Yoshida, T. Furukawa, J. Matsumoto, H. Tanuma, T. Azuma, H. Shiromaru and K. Hansen:
" Detection of recurrent fluorescence photons emitted from C₄^-"
J. Phys. Conf. Series 875 (2017) 012017

K. Hansen, P. Ferrari, E. Janssens, and P. Lievens:
" Thermal radiation of gold clusters on microsecond times scales "
Phys. Rev. A 96 (2017) 022511

K. Hansen:
" Single photon transient hot electron ionization of C₆₀ "
Phys. Chem. Chem. Phys. 19 (2017), 19699

Klavs Hansen, Camilla Skinnerup Byskov, and Steen Brøndsted Nielsen:
“ Energy flow in peptides after UV photoexcitation of backbone linkages ”
Phys. Chem. Chem. Phys. 19 (2017), 19640

E. Mamontov, K. Hansen:
“ Associations and dissociations with time-dependent reaction coefficients in finite polymer mixtures: The model and analytical-numerical method for solution by successive approximations ”
Applied Mathematical Modelling 51 (2017) 109-128

Hansen, Klavs; Ferrari Ramirez, Piero; Janssens, Ewald; Lievens, Peter:
“ Gold cluster electronic radiative cooling and abundances ”
J. Phys. Chem. C 121 (2017) 10663-10669

Klavs Hansen, Robert Richter, Michael Alagia, Stefano Stranges, Luca Schio, Peter Salén, Vasyl Yatsyna, Raimund Feifel, and Vitali Zhaunerchyk:
" Single photon thermal ionisation of C₆₀ "
Phys. Rev. Lett. 118 (2017) 103001 (PRL Editors’ Suggestion)

K. Hansen, M.H. Stockett, M. Kaminska, R.F. Nascimento, E.K. Anderson, M. Gatchell, K.C. Chartkunchand, G. Eklund, H. Zettergren, H.T. Schmidt, and H. Cederquist:
" Spontaneous decay of small copper-cluster anions Cu_n^- (n = 3 − 6) on long time scales "
Phys. Rev. A 95 (2017) 022511

Publications, some highlights:

Phys. Rev. Lett.

E. K. Anderson, A. F. Schmidt-May , P. K. Najeeb , G. Eklund, K. C. Chartkunchand , S. Ros´ en, Å. Larson, K. Hansen , H. Cederquist , H. Zettergren , and H. T. Schmidt:
” Spontaneous Electron Emission from Hot Silver Dimer Anions: Breakdown of the Born-Oppenheimer Approximation "
Phys. Rev. Lett. 124, 173001 (2020)

Yuta Ebara, Takeshi Furukawa, JunMatsumoto, Hajime Tanuma, Toshiyuki Azuma, Haruo Shiromaru, and Klavs Hansen:
" Detection of Recurrent Fluorescence Photons "
Phys. Rev. Lett. 117 (2016) 133004

G. Ito, T. Furukawa, H. Tanuma, J. Matsumoto, H. Shiromaru, T. Majima, M. Goto, T. Azuma, and K. Hansen:
" Cooling dynamics of photo-excited C₆^- and C₆H⁻ "
Phys. Rev. Lett. 112 (2014) 183001

C. Leidlmair, Y. Wang, P. Bartl, H. Schöbel, S. Denifl, M. Probst, M. Alcamí, F. Martín, H. Zettergren, K. Hansen, O. Echt, P. Scheier:
" Structure, energetics and dynamics of helium adsorbed on isolated fullerene ions "
Phys. Rev. Lett. 108 (2012) 076101

A.E.K. Sundén, M. Goto, J, Matsumoto, H. Shiromaru, H. Tanuma, T. Azuma, J.U. Andersen, S.E. Canton, and K.Hansen:
" Absolute cooling rates of freely decaying fullerenes "
Phys. Rev. Lett. 103 (2009) 143001, See also article about our results: Nature Nanotechnology 4 (2009) 701

J. Fedor, K. Hansen, J.U. Andersen, and P. Hvelplund:
" Non-thermal powerlaw decay of metal dimer anions "
Phys. Rev. Lett. 94 (2005) 113201

S. Tomita, J.U. Andersen, E. Bonderup, P. Hvelplund, Bo Liu, S.B. Nielsen, U.V. Pedersen, J. Rangama, K. Hansen, O. Echt:
" Dynamic Jahn-Teller effects in isolated C₆₀^- studied by near-infrared spectroscopy in a storage ring "
Phys. Rev. Lett. 94 (2005) 053002

K. Hansen, J.U. Andersen, P. Hvelplund, S.P. Møller, U.V. Pedersen, and V.V. Petrunin:
" Observation of 1/t decay law for hot clusters and molecules in a storage ring "
Phys. Rev. Lett. 87 (2001) 123401

M. Vogel, K. Hansen, A. Herlert and L. Schweikhard:
" Model-free determination of dissociation energies in polyatomic systems "
Phys. Rev. Lett. 87 (2001) 013401

E.E.B. Campbell, K. Hansen, K. Hoffmann, G. Korn, M. Tchaplyguine, M. Wittmann, I.V. Hertel:
" From Above Threshold Ionization to Statistical Electron Emission: The Laser Pulse Duration Dependence of C₆₀ Photoelectron Spectra "
Phys. Rev. Lett. 84 (2000) 2128

C. Walther, G. Dietrich, W. Dostal, K. Hansen, S. Kruckeberg, K. Lutzenkirchen and L. Schweikhard:
" Radiative Cooling of a Small Metal Cluster: The Case of V₁₃⁺"
Phys. Rev. Lett. 83 (1999) 3816

K. Hansen and O. Echt:
" Thermionic Emission and Fragmentation of C₆₀ "
Phys. Rev. Lett. 78 (1997) 2337

S. Bjørnholm, J. Borggreen, O. Echt, K. Hansen, J. Pedersen, and H.D. Rasmussen:
" Mean-field quantization of several hundred electrons in sodium metal clusters "
Phys. Rev. Lett. 65 (1990) 1627

Science

C. Yeretzian, K. Hansen and R.L. Whetten:
" Rates of electron emission from negatively charged, impact-heated fullerenes "
Science 260 (1993) 652

Nature

C. Yeretzian, K. Hansen, F. Diederich and R.L. Whetten:
" Coalescence reactions of fullerenes "
Nature 359 (1992) 44

J. Pedersen, S. Bjørnholm, J. Borggreen, K. Hansen, T.P. Martin and H.D. Rasmussen:
" Observation of quantum supershells in clusters of sodium atoms "
Nature 353 (1991) 733

Books:

[2] K. Hansen: Statistical Physics of Nanoparticles in the Gas Phase, Springer (2018) (2nd edition)
ISBN 978-3-319-90061-2 (print), 978-3-319-90062-9 (eBook). http://dx.doi.org/10.1007/978-3-319-90062-9

[1] K. Hansen: Statistical Physics of Nanoparticles in the Gas Phase (1st edition)
Springer, Dordrecht, 2013 ISBN 978-94-007-5838-4 (print), 978-94-007-5839-1 (electronic) . http://dx.doi.org/10.1007/978-94-007-5839-1