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An Account of Bound Excitons in Semiconductors
The term “bound exciton,” used in connection with semicon-ductors, is generally taken to describe a state in which a hole and an electron is...
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Ternary Two-Cation Compounds Without Defects
Most of the compounds of this type have a lattice close to that of chalcopyrite CuFeS2, which is regarded as the typical representative of this group...
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Luminescence of II-VI Compounds Doped with Transition Metal Ions
The killer action of transition metal ions in II-VI compounds is a result of their ability to capture a free carrier in one of the excited 3d energy...
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Implantation of Bi into GaP III. Hot-Implant Behavior
Channeling and photoluminescence are studied in GaP implanted with Bi at an elevated temperature (450°C), and comparison is made with samples...
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Optical transitions of Ag− centers in alkali halides
Ag − centers in alkali halides give rise to a strong absorption band in the 300 nm region (formerly called “B band”). Its resolved triplet structure...
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Au−-Zentren in Alkalihalogenidkristallen
Au − ions at anionic places are formed in gold doped crystals by a reducing treatment with F centers. The ultraviolet absorption consists of 4 bands,...
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Anionische Silberzentren („B-Zentren“) in Alkalihalogeniden
It is proposed that negatively charged silver ions on anion sites are responsible for the B bands found in silver doped alkalihalides. Experimental...
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Determination of Plasma Parameters from the Shape of Spectral Lines
The line shapes of spectral lines of atoms or ions in a plasma are distorted as a consequence of various processes, each of which leaves its own mark...
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Hole Centers in Halide Lattices
Irradiation of ionic crystals can produce a large variety of stable defects involving both charge separation and ionic displacement. Some of the...
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Luminescence of Isoelectronic Mn4+ and Cr3+ Ions in Magnesium Orthotitanate
Powder samples of Mg2TiO4:Cr3+ and Mg2TiO4:Mn4+ with activator concentrations from 0.01 to 1.5% have heen prepared hy annealing of MgO/TiO2-mixtures....
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Lithium Donors and the Binding of Excitons at Neutral Donors and Acceptors in Gallium Phosphide
Two interstitial Li donors have heen identified in GaP through the photoluminescence spectra they induce. Donor A exhibits bound exciton and d-a pair...
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Interaction of Photons and Charged Particles with Air Molecules
The photon energies covered in this section are much larger than those which lead to the excitation of a bound electron to another bound state and...
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Spectra of Ions in Crystals
The absorption and emission spectra for ions in solids are usually explained today in terms of the crystal field theory, or ligand field theory, as...
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Isotope Shifts
The atomic electron provides a useful and sensitive probe for the investigation of certain nuclear properties. Spectroscopic studies of hyperfine...
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