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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Journal ArticleDOI
CunXp+ clusters (X=Cr, Mn, Ni) studied by secondary ionic emission
P Joyes,M Leleyter +1 more
TL;DR: In this article, the mass spectra intensities of molecular ions CunX+ (X=Cr, Mn, Ni) emitted from a (CuX) alloy bombarded by a primary ion beam are discussed.
Book ChapterDOI
Stability of Alkali Metal Clusters
Yasushi Ishii,Satoru Sugano +1 more
TL;DR: In the recent experiments of mass spectroscopy for various kinds of small clusters, the pronounced abundance has been observed at certain numbers of atoms forming a cluster, usually called "magic numbers" of a cluster.
Book ChapterDOI
Moments of inertia in cluster and coordination compounds
TL;DR: In this article, the moments of inertia of molecules are used to define the shapes of coordination compounds and cluster molecules, and the shape analysis may be related either to electronic factors responsible for distorting the geometry of the molecule or used to determine the location of the molecular on the rearrangement coordinate linking alternative polytopal forms.
Book ChapterDOI
Isolated, Bare Metal Clusters: Abundances And Ionization
TL;DR: In this article, the authors discuss the scope and experimental applicability of global and detailed theoretical descriptions of metal cluster ensembles, and problems to be solved are enumerated, including how to port results from one cluster source to another.
Journal ArticleDOI
A Correlation Study of Small Potassium Cationic Clusters
S. D. Altekar,Asok K. Ray +1 more
TL;DR: In this article, the properties of small potassium cationic K (2 ≦ n ≦ 7) clusters are investigated from the point of view of binding and fragmentation energies.
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.
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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.