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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The Hückel model for small metal clusters. I. Geometry, stability, and relationship to graph theory
TL;DR: In this paper, the relative stabilities of alkali-like metal clusters, Mn and M+n with 2≤n≤9, are calculated within the framework of the simple Huckel model.
Journal ArticleDOI
What is a Metal
Ptitljr P. Fcdwards,M. J. Sienko +1 more
TL;DR: A survey of simple predictive models and operational definitions of the metallic state is given in this paper, highlighting the essential features of electron localization versus itinerancy in both crystalline and disordered materials.
Journal ArticleDOI
Electronic spin—orbit interaction and the molecular Aharonov—Bohm effect
TL;DR: In this paper, the authors considered a three-nucleus system and showed explicitly that the qualitative results remain unchanged for this case, and the behavior under permutations of identical nuclei is studied.
Journal ArticleDOI
A pseudo-Jahn-Teller treatment of the pseudorotational spectrum of Na3
R. Meiswinkel,Horst Köppel +1 more
TL;DR: In this article, the B system of the two-photon ionization spectrum of Na 3 was investigated theoretically, paying special attention to the influence of a nearby electronic state on the pseudorotational motion.
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.