应兰州大学物理学院、萃英学院和理论物理交流平台邀请，天津大学Klavs Hansen教授将来我校进行学术合作交流并做学术报告，欢迎广大师生参加！
报告人：Klavs Hansen教授
题 目：Single photon hot eletron ionization of fullerenes II
时 间：2020年10月29日（周四）上午09:30
地 点：格致楼3016会议室
联系人：罗洪刚/吴威
报告摘要：
The ionization of neutral molecules and electron detachment of anions can proceed in processes delayed by several hundred femtoseconds. These processes involve a highly excited electronic subsystem and has been observed for a number of molecules and clusters exposed to photons with energies far below the ionization energy [1-4]. Recently the process was also observed for C60 and C70 when these molecules were exposed to photons with energies far above the ionization energy [5,6].
In the talk I will present the background for and results of these experiments that were performed at the Elettra synchrotron ring, and discuss some possible implications for our understanding of the ionization process.
References
1 E.E.B. Campbell et al., The Laser Pulse Duration Dependence of C60 Photoelectron Spectra, Phys. Rev. Lett. 2000, 84, 2128
2 R. Schlipper, R. Kusche, B. v. Issendorff, and H. Haberland, Thermal emission of electrons from highly excited sodium clusters, Appl. Phys. A 2001, 72, 255
3 M. Kjellberg, O. Johansson, F. Jonsson, A.V. Bulgakov, C. Bordas, E.E.B. Campbell, and K. Hansen, Momentum map imaging photoelectron spectroscopy of fullerenes with femtosecond laser pulses, Phys. Rev. A 2010, 81, 023202
4 M. Kjellberg, A.V. Bulgakov, M. Goto, O. Johansson, and K. Hansen, Femtosecond electron spectroscopy of coronene, benzo[GHI]perylene and anthracene, J. Chem. Phys. 2010, 133, 074308
5 Klavs Hansen, et al., Single photon thermal ionisation of C60, Phys. Rev. Lett. 2017, 118, 103001
6 Aa. Anderson et al., Single photon thermal ionisation of C70, to be published
个人简历：
Klavs Hansen, Professor of Physics, Tianjin University, P.R. China. My main research interests are: Nanoscale particles in the gas phase; nanoparticles and large molecules, including fullerenes, metal and molecular clusters, and polycyclic aromatic hydrocarbon (PAH) molecules. Main topics: Finite size effects of quantum and thermal phenomena. Tools: Electrostatic storage rings, mass spectrometers.
Publications: 160 peer-reviewed; H-index = 37; citations 4200+ (Database: Web of Science); Monograph 'Statistical Physics of Nanoparticles in the Gas Phase' (2nd edition published 2018).
