Alkali halide crystal fluorescence
WebFeb 1, 2001 · In some alkali halides, Cu+ is easily incorporated, while in others only an elaborate and specific procedure yields such samples. Data on Cu+ luminescence in … WebThe weak absorption band caused by oxygen was the same in all three crystals, and did not vary with temperature. The band had maximum absorption at 5.0 ev and a half-width of 1.0 ev. ... Optical Absorption and Fluorescence of Oxygen in Alkali Halide Crystals J. Rolfe, F. R. Lipsett, and W. J. King Phys. Rev. 123, 447 – Published 15 July 1961.
Alkali halide crystal fluorescence
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WebThe alkali-halide disk method. The alkali-halide disk technique is another traditional transmission sample presentation method, in which an intimate mixture of the finely … WebApr 25, 1986 · Pho- toconductivity in alkali halide crystals due to a two- photon process was observed [17]. Two-photon and three-photon absorption coefficients were measured …
WebAlkali metal halide. In chemistry, alkali metal halides, or alkali halides, are the family of inorganic compounds with the chemical formula MX, where M is an alkali metal and X is a halogen. These compounds are the often commercially significant sources of these metals and halides. The best known of these compounds is sodium chloride, table salt. WebLuminescence emission measurements made at 4.2°K on KI crystals containing the ions S2 −, Se2 −, and SeS− revealed characteristic banded emission spectra similar to that of O2 −, though both emission and excitation occur at longer wavelengths. The SeS− emission was always accompanied by S2 − and Se2 − emissions, so the emission spectrum was …
WebMay 21, 2007 · The purpose of this work was to study the structure of defects in alkali halide crystals containing copper or strontium impurity by optical and EXAFS methods. … Webexcited state of the center. F center is the simplest trapped-electron center in alkali halide crystals. Absorption wavelength increases (~from 4000 angstrom to 6000 angstrom) with the size of the alkali ion (from Li to Cs) because the electron at the vacant site are less bound to the larger alkali ions. 5. Other centers.
WebIt is shown that the kinetic emission of electrons from AHC is due to the quasimolecular mechanism for separation of the weakly bound electron from the anion and the ordinary ionization of cation and anion by the Firsov mechanism.
WebAbstract: An attempt is made to interpret the properties of alkali halide‐thallium phosphors. The experimental basis of this interpretation is the work of Pohl and his numerous collaborators on these substances. It is concluded that the long wave‐length absorption peaks of the phosphors which are not contained in the pure alkali halides are to be … futon instruction manualWebThe fluorescence emission spectra consisted of a series of peaks in the wavelength range 4000-10 000 A, with an approximately equal energy separation of 1000 cm -1. At 300°K, … giving me the vapors meaningWebJun 15, 2024 · A typical quadruple node (QN) of triple junctions (TJs) of grain boundaries (GBs) in a Eu 2+-doped KCl 0.52 Br 0.48 solid solution is investigated from the geometrical point of view by epifluorescence microscopy using the doping ion as a fluorochrome. The excitation and fluorescence optical properties of the fluorochrome were previously … futon in store near meWebApr 8, 2016 · Novel Luminescent Heterobimetallic Nanoclusters of Copper (I), Silver (I) and Gold (I) Doped in Different Alkali Halide Crystals The … giving me the courage and the strength i needWebMay 21, 2007 · The purpose of this work was to study the structure of defects in alkali halide crystals containing copper or strontium impurity by optical and EXAFS methods. The choice of the crystal type for study is caused by simplicity of the crystal lattice structure and hence interpretation of obtained results. Section snippets Experimental technique futon frame wood queen couchWebAt low concentration and in quenched crystals the impurity is in site of the lattice. At concentrations higher than 0.15 wt% Sr, the impurity forms SrCl 2 phase. For the crystals containing Cu + impurity, it has been shown that an increase in the impurity concentration leads to the formation of clusters with CuCl structure. At the same time the ... futon frames loveseatWebThe first F centers created were in alkali halide crystals. These halides were exposed to high-energy radiation, such as X-rays, gamma radiation or a tesla coil. There are three mechanisms of energy absorption by radiation:: 209–216 a) Exciton formation. This amounts to an excitation of a valence electron in a halide ion. futon frames wood