Precision bond lengths for Rydberg Matter clusters KN (N = 19, 37, 61 and 91) in excitation levels n = 4 - 8 from rotational radio-frequency emission spectraClusters of the electronically excited condensed matter Rydberg Matter (RM) are planar and six-fold symmetric with magic numbers N = 7, 19, 37, 61 and 91. The bond distances in the clusters are known…Leif Holmlid·Jul 23, 2006SaveLearn
Collisionless energy absorption in the short-pulse intense laser-cluster interactionIn a previous Letter [Phys. Rev. Lett. 96, 123401 (2006)] we have shown by means of three-dimensional particle-in-cell simulations and a simple rigid-sphere model that nonlinear resonance absorption…M. Kundu, D. Bauer·Jul 21, 2006SaveLearn
Magnetism and Magnetic Isomers in Free Chromium ClustersWe have used the Stern-Gerlach deflection technique to study magnetism in chromium clusters of 20-133 atoms. Between 60 K and 100 K, we observe that these clusters have large magnetic moments and…F. W. Payne, Wei Jiang, L. A. Bloomfield·Jul 20, 2006SaveLearn
Exploration of electronic quadrupole states in atomic clusters by two-photon processesWe analyze particular two-photon processes as possible means to explore electronic quadrupole states in free small deformed atomic clusters. The analysis is done in the time-dependent local density…V. O. Nesterenko, P. -G. Reinhard, Th. Halfmann et al.·Jun 12, 2006SaveLearn
Structure, electronic properties and magnetic transition in manganese clustersWe systematically investigate the structural, electronic and magnetic properties of Mnn clusters (n = 2-20) within the ab-initio pseudopotential plane wave method using generalized…Mukul Kabir, Abhijit Mookerjee, D. G. Kanhere·Jun 4, 2006SaveLearn
Unexpected Magnetism of Small Silver ClustersThe ground-state electronic, structural, and magnetic properties of small silver clusters, Agn (222), have been studied using a linear combination of atomic Gaussian-type orbitals…M. Pereiro, D. Baldomir, J. E. Arias·May 18, 2006SaveLearn
What is the meaning of lifetime measurement?The lifetime measurement of molecular excited state has been the subject of many papers and experiments. Very often the experimental data are fitted by single or bi exponential decays which in many…Christophe Jouvet, Gilles Grégoire, Claude Dedonder Lardeux·May 4, 2006SaveLearn
Wave packet dynamics of potassium dimers attached to helium nanodropletsThe dynamics of vibrational wave packets excited in K2 dimers attached to superfluid helium nanodroplets is investigated by means of femtosecond pump-probe spectroscopy. The employed resonant…P. Claas, G. Droppelmann, C. P. Schulz et al.·Apr 18, 2006SaveLearn
Fully retarded van der Waals interaction between dielectric nanoclustersThe fully retarded dispersion interaction between an atom and a cluster or between two clusters is calculated. Results obtained with two different methods are compared. One is to consider a cluster…Hye-Young Kim, Jorge O. Sofo, Darrell Velegol et al.·Mar 20, 2006SaveLearn
A versatile electrostatic trapA four electrode electrostatic trap geometry is demonstrated that can be used to combine a dipole, quadrupole and hexapole field. A cold packet of 15ND3 molecules is confined in both a purely…Jacqueline van Veldhoven, Hendrick L. Bethlem, Melanie Schnell et al.·Mar 1, 2006SaveLearn
A Density Functional Study of Bare and Hydrogenated Platinum ClustersWe perform density functional theory calculations using Gaussian atomic-orbital methods within the generalized gradient approximation for the exchange and correlation to study the interactions in the…Ali Sebetci·Feb 3, 2006SaveLearn
Electron-loss and target ionization cross sections for water vapor by 20-150 keV neutral atomic hydrogen impactA complete set of cross sections is reported for the ionization of water molecules by neutral atomic hydrogen impact at velocities of the order of the Bragg peak. The measured relative cross sections…F. Gobet, S. Eden, B. Coupier et al.·Jan 13, 2006SaveLearn
Absolute cross sections for the dissociation of hydrogen cluster ions in high-energy collisions with helium atomsAbsolute dissociation cross sections are reported for Hn+ clusters of varied mass (n = 3, 5, ..., 35) following collisions with He atoms at 60 keV / amu. Initial results have been published in a…S. Eden, J. Tabet, K. Samraoui et al.·Jan 11, 2006SaveLearn
Nonlinear resonance absorption in laser-cluster interactionRare gas or metal clusters are known to absorb laser energy very efficiently. Upon cluster expansion the Mie plasma frequency may become equal to the laser frequency. This linear resonance has been…M. Kundu, D. Bauer·Dec 27, 2005SaveLearn
Fast electronic relaxation in metal nanoclusters via excitation of coherent shape deformations: Circumventing a bottleneckElectron-phonon relaxation in size-quantized systems may become inhibited when the spacing of discrete electron energy levels exceeds the magnitude of the phonon frequency. We show, however, that…Vitaly V. Kresin, Yu. N. Ovchinnikov·Dec 22, 2005SaveLearn
Large-N droplets in two dimensionsUsing lattice effective field theory, we study the ground state binding energy of N distinct particles in two dimensions with equal mass interacting weakly via an attractive SU(N)-symmetric short…Dean Lee·Dec 9, 2005SaveLearn
Electronic excitations in atomic clusters: beyond dipole plasmonMultipole electron modes beyond the Mie plasmon in atomic clusters are investigated within the time-dependent local density approximation theory (TDLDA). We consider the origin of the modes, their…V. O. Nesterenko, P. -G. Reinhard, W. Kleinig·Dec 7, 2005SaveLearn
Practicable factorized TDLDA for arbitrary density- and current-dependent functionalsWe propose a practicable method for describing linear dynamics of different finite Fermi systems. The method is based on a general self-consistent procedure for factorization of the two-body residual…V. O. Nesterenko, J. Kvasil, P. -G. Reinhard·Dec 7, 2005SaveLearn
Scattering length for helium atom-diatom collisionWe present results on the scattering lengths of 4He--4He2 and 3He--4He2 collisions. We also study the consequence of varying the coupling constant of the atom-atom interaction.Elena A. Kolganova, Alexander K. Motovilov, Werner Sandhas·Dec 5, 2005SaveLearn
Explicit Representations for the T-Matrix on Unphysical Energy Sheets and Resonances in Two- and Three-Body SystemsWe discuss the structure of the two- and three-body T-matrices, scattering matrices, and resolvents continued to the unphysical energy sheets. Our conclusions arise due to the representations that…Alexander K. Motovilov·Nov 28, 2005SaveLearn
Observation of individual molecules trapped on a nanostructured insulatorFor the first time, ordered polar molecules confined in monolayer-deep rectangular pits produced on an alkali halide surface by electron irradiation have been resolved at room temperature by…Laurent Nony, Enrico Dr. Gnecco, Alexis Baratoff et al.·Nov 22, 2005SaveLearn
Distance dependence of force and dissipation in non-contact atomic force microscopy on Cu(100) and Al(111)The dynamic characteristics of a tip oscillating in the nc-AFM mode in close vicinity to a Cu(100)-surface are investigated by means of phase variation experiments in the constant amplitude mode. The…Oliver Pfeiffer, Laurent Nony, Roland Bennewitz et al.·Nov 17, 2005SaveLearn
Cu-TBPP and PTCDA molecules on insulating surfaces studied by ultra-high-vacuum non-contact AFMThe adsorption of two kinds of porphyrin (Cu-TBPP) and perylene (PTCDA) derived organic molecules deposited on KBr and Al2O3 surfaces has been studied by non-contact force microscopy in ultra-high…Laurent Nony, Roland Prof. Bennewitz, Oliver Dr. Pfeiffer et al.·Nov 17, 2005SaveLearn
T-shaped dimer of coroneneAn evidence of importance of the T-shaped configuration of coronene dimer is presented. That is, the dimer's lowest energy configuration is not necessarily a stack, as it might had been expected…O. I. Obolensky, V. V. Semenikhina, A. V. Solov'yov et al.·Nov 10, 2005SaveLearn
Two-Photon Excitation of Low-Lying Electronic Quadrupole States in Atomic ClustersA simple scheme of population and detection of low-lying electronic quadrupole modes in free small deformed metal clusters is proposed. The scheme is analyzed in terms of the TDLDA (time-dependent…V. O. Nesterenko, P. -G. Reinhard, T. Halfmann et al.·Nov 8, 2005SaveLearn