Quantum dynamics of Rb atoms desorbing off the surface of He nanodropletsThe desorption of excited rubidium (Rb) atoms off the surface of helium (He) nanodroplets is studied in detail using femtosecond time-resolved photoion and photoelectron imaging spectroscopy in…N. V. Dozmorov, J. von Vangerow, J. A. M. Fordyce et al.·Sep 13, 2018SaveLearn
From Molecular to Metallic Gold Nanoparticles: The Role of Nanocrystal Symmetry in the Crossover RegionBulk gold is a good metal, i.e., conductor of electricity and heat, due to its delocalized electron density that can respond to extremely small external perturbations such as electric field or…Sami Malola, Sami Kaappa, Hannu Hakkinen·Sep 12, 2018SaveLearn
Conical Intersections Induced by Quantum Light: Field-Dressed Spectra from the Weak to the Ultrastrong Coupling RegimesA fundamental theoretical framework is formulated for the investigation of rovibronic spectra resulting from the coupling of molecules to one mode of the radiation field in an optical cavity. The…Tamás Szidarovszky, Attila. G. Császár, Gábor J. Halász et al.·Aug 14, 2018SaveLearn
The Gregory-Newton Problem for Kissing Sticky SpheresAll possible non-isomorphic arrangements of 12 spheres kissing a central sphere (the Gregory-Newton problem) are obtained for the sticky-hard-sphere (SHS) model, and subsequently projected by…Lukas Trombach, Peter Schwerdtfeger·Aug 9, 2018SaveLearn
Point Group Symmetry Analysis of the Electronic Structure of Bare and Protected Metal NanocrystalsThe electronic structures of a variety of experimentally identified gold and silver nanoclusters from 20 to 246 atoms, either unprotected or protected by several types of ligands, are characterized…Sami Kaappa, Sami Malola, Hannu Häkkinen·Aug 6, 2018SaveLearn
Systematic First Principles Configuration-Interaction Calculations of Linear Optical Absorption Spectra in Silicon Hydrides : Si2H2n (n = 1-3)We have performed first principles electron-correlated calculations employing large basis sets to optimize the geometries, and to compute linear optical absorption spectra of various low-lying…Pritam Bhattacharyya, Deepak Kumar Rai, Alok Shukla·Jul 30, 2018SaveLearn
The laser synthesis of linear carbon chainsWe synthesize macroscopically long linear carbon chains (carbynes) in a colloidal solution, then deposit them on a surface. The method is based on the formation of carbon threads by laser ablation in…Stella Kutrovskaya, Anton Osipov, Alexey Povolotskiy et al.·Jul 26, 2018SaveLearn
Spin excitations in a 4f-3d heterodimer on MgOWe report on the magnetic properties of HoCo dimers as a model system for the smallest intermetallic transition metal-lanthanide compound. The dimers are adsorbed on ultrathin MgO(100) films grown on…A. Singha, F. Donati, F. D. Natterer et al.·Jul 24, 2018SaveLearn
Dissociative electron attachment to sulfur dioxide : A theoretical approachIn this article, density functional theory (DFT) and natural bond orbital (NBO) calculations are performed to understand experimental observations of dissociative electron attachment (DEA) to SO2.…Irina Jana, Sumit Naskar, Mousumi Das et al.·Jul 6, 2018SaveLearn
Photoelectron circular dichroism with two overlapping laser pulses of carrier frequencies ω and 2ω linearly polarized in two mutually-orthogonal directionsUsing a model methane-like chiral system, we theoretically demonstrate a possibility to access photoelectron circular dichroism (PECD) by a single experiment with two overlapping laser pulses of…Philipp V. Demekhin, Anton N. Artemyev, Alexander Kastner et al.·Jul 3, 2018SaveLearn
Absolute cross-sections of fragment negative ions in electron collisions with difluoromethaneDissociative electron attachment (DEA) and ion-pair dissociation (IPD) processes of Difluoromethane (CH2F2) have been studied in the incident electron energy range 0 to 45 eV. Three different…Dipayan Chakraborty, Dhananjay Nandi·Jun 25, 2018SaveLearn
Medium-sized Sin- (n=14-20) clusters: a combined study of photoelectron spectroscopy and DFT calculationsSize-selected anionic silicon clusters, Sin- (n=14-20), have been investigated by photoelectron spectroscopy and density functional theory (DFT) calculations. Low-energy structures of the clusters…Xue Wu, Xiaoqing Liang, Qiuying Du et al.·Jun 17, 2018SaveLearn
Frustrated Coulomb explosion of small helium clustersAlmost ten years ago, energetic neutral hydrogen atoms were detected after a strong-field double ionization of H2. This process, called 'frustrated tunneling ionization', occurs when an…S. Kazandjian, J. Rist, M. Weller et al.·Jun 16, 2018SaveLearn
Direct observation of interatomic Coulombic decay and subsequent ion-atom scattering in helium nanodropletsWe report on the experimental observation of interatomic Coulombic decay (ICD) in pure 4He nanoclusters of mean sizes between N ≈ 5000 and 30000 and the subsequent scattering of energetic…F. Wiegandt, F. Trinter, K. Henrichs et al.·Jun 13, 2018SaveLearn
Developing effective electronic-only coupled-cluster and Muller-Plesset perturbation theories for the muonic moleculesRecently we have proposed an effective Hartree-Fock (EHF) theory for the electrons of the muonic molecules that is formally equivalent to the HF theory within the context of the Nuclear-Electronic…Mohammad Goli, Shant Shahbazian·Jun 4, 2018SaveLearn
Centre line intensity of a supersonic helium beamSupersonic helium beams are used in a wide range of applications, for example surface scattering experiments and, most recently, microscopy. The high ionization potential of neutral helium atoms…Adrià Salvador Palau, Sabrina D. Eder, Truls Andersen et al.·Jun 1, 2018SaveLearn
Decays of excited silver cluster anions Agn, n = 4 to 7, in DESIREESpontaneous decays of small, hot silver cluster anions Agn, n=4-7 have been studied using one of the rings of the Double ElectroStatic Ion Ring ExpEriment (DESIREE). Observation of these…E. K. Anderson, M. Kamińska, K. C. Chartkunchand et al.·May 31, 2018SaveLearn
Long-term monitoring of the internal energy distribution of isolated cluster systemsA method is presented to monitor the internal energy distribution of cluster anions via delayed electron detachment by pulsed photoexcitation and demonstrated on Co4- in an electrostatic ion…Christian Breitenfeldt, Klaus Blaum, Sebastian George et al.·May 29, 2018SaveLearn
Photoelectron circular dichroism in the multiphoton ionization by short laser pulses: II. Three- and four-photon ionization of fenchone and camphorAngle-resolved multiphoton ionization of fenchone and camphor by short intense laser pulses is computed by the time-dependent Single Center (TDSC) method. Thereby, the photoelectron circular…Anne D. Müller, Anton N. Artemyev, Philipp V. Demekhin·May 18, 2018SaveLearn
Observation of vector and tensor light shifts in 87Rb using near-resonant, stimulated Raman spectroscopyWe present the derivation of the frequency dependent scalar, vector, and tensor dynamical polarizabilities for the two hyperfine levels of the 87Rb atom 5s ground state. Based on the characterization…Qing-Qing Hu, Christian Freier, Yuan Sun et al.·May 15, 2018SaveLearn
Cold Physics and Chemistry: Collisions, Ionization and Reactions inside Helium Nanodroplets Close to Zero KThis review has two principal aims. The first of these is to provide a comprehensive overview of the applications of HNDs in the study of collections of atoms and molecules, i.e. clusters and…A. Mauracher, O. Echt, A. M. Ellis et al.·May 9, 2018SaveLearn
Low-temperature Condensation of CarbonTwo different types of experiments were performed. In the first experiment, we studied the low-temperature condensation of vaporized graphite inside bulk liquid helium, while in the second…S. A. Krasnokutski, M. Goulart, E. B. Gordon et al.·May 4, 2018SaveLearn
Heterogeneous reactions between ions NH3+ and NH+ and hydrocarbons adsorbed on a tungsten surface. Formation of HCN+ in NH+-surface hydrocarbons collisionsInteraction of NH3+ (ND3+) and NH+ with a hydrocarbon-covered tungsten surface kept at room temperature and heated to 150°C and 300°C showed a series of reactions between the…Martina Harnisch, Paul Scheier, Zdenek Herman·May 3, 2018SaveLearn
Observation of stable HO4+ and DO4+ ions from ion-molecule reactions in helium nanodropletsIon-molecule reactions between clusters of H2/D2 and O2 in liquid helium nanodroplets were initiated by electron-induced ionization (at 70 eV). Reaction products were detected by mass…Michael Renzler, Stefan Ralser, Lorenz Kranabetter et al.·May 2, 2018SaveLearn
The adsorption of helium atoms on coronene cationsWe report the first experimental study of the attachment of multiple foreign atoms to a cationic polycyclic aromatic hydrocarbon (PAH). The chosen PAH was coronene, C24H12, which was added…Thomas Kurzthaler, Bilal Rasul, Martin Kuhn et al.·May 2, 2018SaveLearn