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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Continuous chemical amplification of single- and multi-mode lasers in the visible region
TL;DR: In this article, the chemiluminescent spectrum for the Na3 + Br→Na2* + NaBr reaction has been analyzed to determine that optical gain through stimulated emission characterizes certain distinct visible spectral regions.
Journal ArticleDOI
Electronically driven magnetic transition and dimensionality crossover in Li4 clusters
TL;DR: The existence of a new metastable phase of Li 4 with spin triplet in the shape of a distorted tetrahedron is proposed in this article, which is 0.4 eV above the spin-singlet planar ground state of the tetramer.
Journal ArticleDOI
Molecular beam photoionization and fragmentation of D2S, (H2S)2, (D2S)2, and H2S⋅H2O
TL;DR: In this paper, a molecular beam photoionization study of (H2S)2 and (D2S2, generated in the supersonic expansion of H2S and d2S through a nozzle is reported.
Journal ArticleDOI
AB initio many body perturbation theoretic study of small sodium clusters
TL;DR: In this article, the many-body perturbation theory has been applied to investigate the properties of neutral sodium clusters and the results have been compared with available theoretical and experimental data in the literature.
Journal ArticleDOI
The role of surface defects in laser-induced thermal desorption from metal surfaces
TL;DR: In this paper, the laser-induced thermal desorption of Na dimers from rough sodium surfaces adsorbed on quartz substrates has been studied, where laser pulses with λ = 532 and 1064 nm and 7 ns duration were used.
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.