Journal ArticleDOI
Preparation and photoionization potentials of molecules of sodium, potassium, and mixed atoms
TLDR
In this article, photoionization near the threshold allows identification of Naxx?16, Kxx?12, and NaxKyx+y?6, which is the longest contiguous series of any property as a function of cluster size.Abstract:
In supersonic nozzle beams of sodium, potassium, and Na/K molecular aggregates Mx have been investigated by several techniques based on mass spectrometry. By electron impact ionization with energy of 20 eV clusters with x≳4 are not observable. Photoionization near the threshold allows identification of Naxx?16, Kxx?12, and NaxKyx+y?6. Single photon ionization thresholds for Naxx?14 are given, this being the hitherto longest contiguous series of any property as a function of cluster size. For Kxx?8 and for 8 Na/K mixed clusters PI thresholds are similarly determined. Very accurate two photon photoionization thresholds for Na2 and K2 have been obtained. Theoretical models of metal clusters from recent publications are not able to adequately interpret the electronic properties of these particles as reflected by the ionization potentials.read more
Citations
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Big bang methodology applied to atomic clusters
TL;DR: In this paper, an implementation of a novel strategy for cluster geometry optimization, using a stochastic method, is applied to the study of alkali metal clusters, based on the spirit of Big Bang theory.
Journal ArticleDOI
A diabatic representation of the two lowest electronic states of Li3
TL;DR: In this article, the adiabatic potential energy surfaces of Li3 are computed using the Multi-Reference Configuration Interaction method and the two lowest electronic states are bound and exhibit a conical intersection.
Journal ArticleDOI
Rare gas matrix studies of the products of vaporization of nickel
TL;DR: In this paper, the transition energies of the 3d94s and 3d84s2 configurations are inhomogeneously broadened to the extent that, for part of the inhomogeneous distribution, the ordering of the states is reversed and the 3D84s23F4 level becomes the ground state.
Journal ArticleDOI
A detector for state-resolved molecular beam experiments using optical fibres
TL;DR: In this article, a detector suitable for state-resolved molecular beam analysis and for the determination of state-to-state differential cross-sections in crossed-beam experiments is described.
Journal ArticleDOI
Nanocrystalline structures prepared by neutral cluster beam deposition
A. Perez,Patrice Mélinon,Vincent Paillard,Véronique Dupuis,Pablo Jensen,Alain Hoareau,J.P. Perez,J. Tuaillon,Michel Broyer,J.L. Vialle,M. Pellarin,B. Baguenard,Jean Lermé +12 more
TL;DR: The low energy cluster beam deposition (LECBD) is an attractive method to produce nanocrystalline structured thin films as discussed by the authors, where clusters do not fragment at the impact on the surface of the substrate leading to a nearly random surface "pavement" when the mean cluster size is high enough to limit their diffusion.
References
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Über die Zuordnung von Wellenfunktionen und Eigenwerten zu den Einzelnen Elektronen Eines Atoms
TL;DR: In this paper, Fock's Naherungsmethode zur Behandung des quantenmechanischen Mehrelektronenproblems aufgestellten Gleichungen werden auf etwas allgemeinerer Grundlage diskutiert.
Journal ArticleDOI
Size effect on the melting temperature of gold particles
Philippe A. Buffat,JP Borel +1 more
TL;DR: In this article, the melting points of small gold particles have been measured using a scanning electron-diffraction technique and the experimental results are quantitatively in good agreement with two phenomenological models.
Introduction to solid state physics
TL;DR: In this paper, the Hartree-Fock Approximation of many-body techniques and the Electron Gas Polarons and Electron-phonon Interaction are discussed.