Partial-Transfer Absorption Imaging: A versatile technique for optimal imaging of ultracold gasesPartial-transfer absorption imaging is a tool that enables optimal imaging of atomic clouds for a wide range of optical depths. In contrast to standard absorption imaging, the technique can be…Anand Ramanathan, Sérgio R. Muniz, Kevin C. Wright et al.·Jun 29, 2012SaveLearn
Impact of ultrafast electronic damage in single particle x-ray imaging experimentsIn single particle coherent x-ray diffraction imaging experiments, performed at x-ray free-electron lasers (XFELs), samples are exposed to intense x-ray pulses to obtain single-shot diffraction…U. Lorenz, N. M. Kabachnik, E. Weckert et al.·Jun 29, 2012SaveLearn
Hybridization-related correction to the jellium model for fullerenesWe introduce a new type of correction for a more accurate description of fullerenes within the spherically symmetric jellium model. This correction represents a pseudopotential which originates from…A. V. Verkhovtsev, R. G. Polozkov, V. K. Ivanov et al.·Jun 22, 2012SaveLearn
A critical analysis of the theoretical scheme to evaluate photoelectron spectraWe discuss in depth the validity and limitations of a theoretical scheme to evaluate photo-electron spectra (PES) through collecting the phase oscillations at a given measuring point. Problems appear…P. M. Dinh, P. Romaniello, P. -G. Reinhard et al.·Jun 18, 2012SaveLearn
Spectroscopy of PTCDA attached to rare gas samples: clusters vs. bulk matrices. II. Fluorescence emission spectroscopyThe interaction between PTCDA (3,4,9,10-perylene-tetracarboxylic-dianhydride) molecules and solid rare gas samples is studied by means of fluorescence emission spectroscopy. On the one hand,…M. Dvorak, M. Müller, T. Knoblauch et al.·Jun 13, 2012SaveLearn
Spectroscopy of PTCDA attached to rare gas samples: clusters vs. bulk matrices. I. Absorption spectroscopyThe interaction between PTCDA (3,4,9,10-perylene-tetracarboxylic-dianhydride) and rare gas or para-hydrogen samples is studied by means of laser-induced fluorescence excitation spectroscopy. The…M. Dvorak, M. Müller, T. Knoblauch et al.·Jun 13, 2012SaveLearn
Energy spectra of small bosonic clusters having a large two-body scattering lengthIn this work we investigate small clusters of bosons using the hyperspherical harmonic basis. We consider systems with A=2,3,4,5,6 particles interacting through a soft inter-particle potential. In…M. Gattobigio, A. Kievsky, M. Viviani·Jun 5, 2012SaveLearn
Six-bodies calculations using the Hyperspherical Harmonics methodIn this work we show results for light nuclear systems and small clusters of helium atoms using the hyperspherical harmonics basis. We use the basis without previous symmetrization or…M. Gattobigio, A. Kievsky, M. Viviani·May 19, 2012SaveLearn
Charge localization in multiply charged clusters and their electrical properties: Some insights into electrospray dropletsThe surface composition of charged Lennard-Jones clusters ANn+, composed of N particles (55 ≤ N ≤ 1169) among which n are positively charged with charge q, thus having a net total charge…David A. Bonhommeau, Riccardo Spezia, Marie-Pierre Gaigeot·May 15, 2012SaveLearn
New Insight into Electronic Shells of Metal Clusters: Analogues of Simple MoleculesUsing Li clusters, a prototype of simple metals, as a test case, we theoretically find that metal clusters can mimic the behavior of simple molecules in electronic shells. It is found that Li14,…Longjiu Cheng, Jinlong Yang·Apr 18, 2012SaveLearn
Theory of spin dynamics of magnetic adatoms traced by time-resolved scanning tunneling spectroscopyThe inelastic scanning tunneling microscopy (STM) has been shown recently (Loth et al. Science 329, 1628 (2010)) to be extendable as to access the nanosecond, spin-resolved dynamics of magnetic…Michael Schüler, Yaroslav Pavlyukh, Jamal Berakdar·Mar 29, 2012SaveLearn
Spatial distribution of ions in a linear octopole radio-frequency ion trap in the space-charge limitWe have explored the spatial distribution of an ion cloud trapped in a linear octopole radio-frequency (rf) ion trap. The two-dimensional distribution of the column density of stored silver dimer…T. Majima, G. Santambrogio, C. Bartels et al.·Mar 25, 2012SaveLearn
Dynamic screening of a localized hole during photoemission from a metal clusterRecent advances in attosecond spectroscopy techniques have fueled the interest in the theoretical description of electronic processes taking place in the subfemtosecond time scale. Here we study the…N. E. Koval, D. Sánchez-Portal, A. G. Borisov et al.·Mar 22, 2012SaveLearn
Evolution of dopant-induced helium nanoplasmasTwo-component nanoplasmas generated by strong-field ionization of doped helium nanodroplets are studied in a pump-probe experiment using few-cycle laser pulses in combination with molecular dynamics…S. R. Krishnan, Ch. Peltz, L. Fechner et al.·Mar 6, 2012SaveLearn
Generalized oscillator strength of endohedral moleculesWe investigate here the fast electron scattering upon endohedral atoms that present a fullerene CN staffed by an atom A, A@CN. We calculate the inelastic scattering cross-section expressing it via…M. Ya. Amusia, L. V. Chernysheva, E. Z. Liverts·Mar 3, 2012SaveLearn
Interplay of the volume and surface plasmons in the electron energy loss spectra of C60The results of a joint experimental and theoretical investigation of the C60 collective excitations in the process of inelastic scattering of electrons are presented. The shape of the electron energy…Alexey V. Verkhovtsev, Andrei V. Korol, Andrey V. Solov'yov et al.·Feb 29, 2012SaveLearn
Matter-positronium interaction: An exact diagonalization study of the He atom - positronium systemThe many-body system comprising a He nucleus, three electrons, and a positron has been studied using the exact diagonalization technique. The purpose has been to clarify to which extent the system…A. Zubiaga, F. Tuomisto, M. J. Puska·Feb 29, 2012SaveLearn
Formalism of collective electron excitations in fullerenesWe present a detailed formalism for the description of collective electron excitations in fullerenes in the process of the electron inelastic scattering. Considering the system as a spherical shell…Alexey V. Verkhovtsev, Andrei V. Korol, Andrey V. Solov'yov·Feb 28, 2012SaveLearn
Large-scale first principles configuration interaction calculations of optical absorption in boron clustersWe have performed systematic large-scale all-electron correlated calculations on boron clusters Bn(n=2--5), to study their linear optical absorption spectra. Several possible isomers of each…Ravindra Shinde, Alok Shukla·Feb 28, 2012SaveLearn
Modeling core-hole screening in jellium clusters using density functional theoryThe screening of a 2p core-hole in Na clusters is investigated using density functional theory applied to an extended jellium model with an all-electron atom in the center. The study is related to…D. Bauer·Feb 27, 2012SaveLearn
Response of Cloud Condensation Nuclei (> 50 nm) to changes in ion-nucleationIn experiments where ultraviolet light produces aerosols from trace amounts of ozone, sulphur dioxide, and water vapour, the number of additional small particles produced by ionization by gamma…Henrik Svensmark, Martin B. Enghoff, Jens Olaf Pepke Pedersen·Feb 23, 2012SaveLearn
Direct imaging of thermally excited metastable structures of ion Coulomb clustersCoulomb crystallisation of large ensembles of ions has in the past years been intensively studied experimentally with many spectacular results of relevance to infinite systems in one-, two-, and…Michael Drewsen, Thierry Matthey, Anders Mortensen et al.·Feb 12, 2012SaveLearn
Photoionization profiles of metal clusters and the Fowler formulaMetal cluster ionization potentials are important characteristics of these "artificial atoms," but extracting these quantities from cluster photoabsorption spectra, especially in the presence…Abhinav Prem, Vitaly V. Kresin·Feb 8, 2012SaveLearn
High-resolution Fourier-transform XUV photoabsorption spectroscopy of 14N15NThe first comprehensive high-resolution photoabsorption spectrum of 14N15N has been recorded using the Fourier-transform spectrometer attached to the Desirs beamline at the Soleil synchrotron.…A. N. Heays, G. D. Dickenson, E. J. Salumbides et al.·Jan 24, 2012SaveLearn
Non-magnetic and magnetic thiolate-protected Au25 superatoms on Cu(111), Ag(111) and Au(111) surfacesGeometry, electronic structure, and magnetic properties of methylthiolate-stabilized Au25L18 and MnAu24L18 (L = SCH3) clusters adsorbed on noble-metal (111) surfaces have been…Xi Chen, Mikkel Strange, Hannu Hakkinen·Jan 20, 2012SaveLearn