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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Book ChapterDOI
Optical and Dynamical Properties of Metal Clusters
Michel Broyer,Guy P. Delacretaz,P. Fayet,P. Labastie,Winston A. Saunders,Jean-Pierre Wolf,Ludger Wöste +6 more
TL;DR: In this article, two-photon ionization (TPI) and depletion spectroscopy (DS) have been used for the analysis of the Na3 ground state, which reveals the complete structure of the predissociated C-state.
Journal ArticleDOI
Ab-initio quasiparticle energies of small sodium clusters by the GW approximation
Book ChapterDOI
Ionization Energies of Large Sodium Clusters: Direct Evidence for Atomic Shell Structure
TL;DR: In this paper, the authors measured the ionization potential of large sodium clusters and showed that magic numbers observed earlier are caused by an increase in the ionisation energy each time a geometric shell of atoms is completed.
Journal ArticleDOI
On the three lowest spin states of Na13+$$ {\mathrm{Na}}_{13}^{+} $$: Hybrid Density Functional Theory and benchmark CASSCF (12,12)+ CASPT2 studies
TL;DR: In this paper , the three lowest spin states (S = 0, 1, 2) of 12 representative Na 13 + $$ {\mathrm{Na}}_{13}^{+} $$ isomers have been estudied using both, KS-DFT via three hybrid density functionals, and benchmark multireference CASSCF and CASPT2 methods with a couple of Dunning's correlation consistent basis sets.
Journal ArticleDOI
Metal nanoclusters: from fundamental aspects to electronic properties and optical applications
Michel Broyer,Philippe Dugourd +1 more
TL;DR: In this paper , the main results obtained on free metal clusters produced in gas phase including mainly electronic properties, the giant atom concept, the optical properties, briefly the role of the metal atom (alkali, divalent, noble metal) and finally the atomic structure of clusters are discussed.
References
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Journal ArticleDOI
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.