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
More filters
Book ChapterDOI
Chapter 7 Dispersed Metal Clusters from Metal Vapor Chemistry
G. A. Ozin,Markp. Andrews +1 more
TL;DR: In this paper, a microscale metal vapor technique was introduced for assessing the outcome of controlled depositions of 1 to 3 different metal atoms into thin polymer or oligomer films or organic solvent/solute systems.
Journal ArticleDOI
A density functional study of the aluminium dimer
TL;DR: In this paper, the ground state of the aluminium dimer was investigated using the density functional method within the selfinteraction correction to local spin density, and the results confirmed that the lowest states are triplets according to the most recent ab initio quantum chemistry calculations, even if the ordering of the symmetries is reversed.
Journal ArticleDOI
The temperature dependence of photoabsorption of V13
TL;DR: In this paper, photoabsorption cross sections of trapped V 13 + clusters were measured for energies between 1.4 eV and 6.1 eV by use of a two-photon fragmentation technique.
Book ChapterDOI
Ab Initio Methods
TL;DR: In this article, the first principles and ab initio keywords have been used to treat many-atom systems as many-body systems composed of electrons and nuclei, and to treat everything on the basis of first principles of quantum mechanics.
Journal ArticleDOI
Interpolation formulae for describing size dependence of properties of finite systems and their use for clusters and biologically important molecules
TL;DR: In this article, the general possibility of introducing simple interpolation formulae for the size dependence of finite systems together with examples of their use for clusters and biologically important macromolecules is discussed.
References
More filters
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.