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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:

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 Pbn+ 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, CN+, 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 Agn- 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 Cun- (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)

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

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

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 (2020) 554-558

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


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天津大学理学院 量子交叉研究中心   地址:天津津南区 雅观路135号 天津大学北洋园校区32楼146 
Center for Joint Quantum Studies, School of Science, Tianjin University     Address : Yaguan Road 135, Jinnan District, 300350 Tianjin, P. R. China