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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Ionization energies of K2X (X=F, Cl, Br, I) clusters.
TL;DR: The presently obtained results support previous theoretical predictions that the excess electron in dipotassiummonohalide clusters is delocalized over two potassium atoms, which is characteristic for F-center clusters.
Journal ArticleDOI
A chemical process producing a continuous laser amplifier in the visible region
TL;DR: In this paper, the reaction dynamics of the Na3-X metathesis were studied and a maximum laser gain of 1% of the input laser power was observed at 5270 A, corresponding to a gain coefficient of ≈ 2 × 10−3 cm−1.
Journal ArticleDOI
Photoionization and fragmentation of alkali metal clusters in supersonic molecular beams
TL;DR: In this article, a supersonic molecular beam, pulsed laser and time-of-flight mass spectrometer are arranged together in order to study photo-and auto-ionization, two-photon ionization and fragmentation processes of alkali clusters as a function of the laser wavelength.
Journal ArticleDOI
Photoionization studies of KH2O, KNH3, K2NH2, and K2OH molecular complexes
T.‐C. Kuan,R.‐C. Jiang,T.‐M. Su +2 more
TL;DR: In this paper, the photoionization threshold energies of K2O, KNH3, K2NH2, and K2OH molecular complexes were measured using a quadrupole mass spectrometer, a conventional light source, and a flow reactor.
Journal ArticleDOI
The static dipole polarizabilities of the lithium dimer, its cation and anion
David M. Bishop,Claude Pouchan +1 more
TL;DR: The static dipole polarizability of Li2, Li+2, and Li−2 in their electronic ground states have been calculated using a pseudopotential treatment for the core electrons as mentioned in this paper.
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.