Results 221 to 230 of about 28,458 (262)

Trapping center parameters in In6S7 crystals

Physica B: Condensed Matter, 2011
Abstract Thermally stimulated current measurements were carried out on In 6 S 7 single crystals in the temperature range of 10–225 K with a constant heating rate of 0.8 K/s. The study of trapping centers was accomplished by the measurements of current flowing along the c -axis of crystals. The analysis of the glow curve according to various methods,
M. Isik, N.M. Gasanly
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Trapping centers in x-irradiated quartz

Soviet Physics Journal, 1969
1. These studies of the effect of annealing on the luminescent and dielectric properties of synthetic quartz confirm the suggestion that electrons localized at traps are responsible for the additional polarization which occurs during irradiation of crystalline quartz; these results also show that the traps are nonimpurity defects which form during ...
V. G. Voevodin, G. I. Potakhova
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Trapped-hole centers in irradiated Li3VO4

Journal of Applied Physics, 1993
Defects in lithium vanadate (Li3VO4) exposed to x rays were studied by electron spin resonance (ESR). 77 K irradiation produces two types of trapped-hole centers. One is supposed to be carbonate radical CO3−, which is thermally stable even at room temperature.
Takuya Murata, Toshikatsu Miki
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Trapping Centers in Thermoluminescent Calcite

Physical Review, 1964
Trapping levels which account for most of the thermoluminescence in natural calcite have been investigated. Results are based on a study of color centers which are shown to be closely associated with the traps involved in thermoluminescence. Optical absorption measurements in a variety of Iceland-spar crystals show that the prominent calcite glow peaks
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Charge Trapping Centers in Ferroelectric Ceramics

MRS Proceedings, 1992
ABSTRACTElectron paramagnetic resonance (EPR), photo-thermal deflection spectroscopy (PDS), and electrical measurements have been used to characterize as-received and UV-lluminated lead lanthanum zirconate titanate (PLZT) and PZT ceramics. Following optical illumination we observe the activation of positively charged Pb+3 and negatively charged Ti+3 ...
C. H. Seager, W. L. Warren, B. A. Tuttle, R. D. Nasby, D. Dimos   +4 more
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One-center trapping of the holes in alkali halide crystals

Physical Review B, 1996
The geometric and electronic structures and electron excitation energies for the one-center hole polaron state and several possible intermediate states corresponding to the hole relaxation in KI are calculated using the static embedded molecular cluster method.
, Shluger, , Gale
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Trap-centers of self-interstitials in silicon

Applied Physics, 1980
Deep-level profiles were measured radially acrossn-type FZ silicon wafers containing A-swirl defects by applying DLTS to an array of Schottky contacts. The trapparameters were obtained very accurately using a computer-fit procedure for the full DLTS peaks. Two acceptor levels atE c −0.49 eV (σ
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Exciton states of the antenna and energy trapping by the reaction center

Photosynthesis Research, 1994
Forward and back energy transfer between antenna and RC in the photosynthetic apparatus of purple bacteria was studied taking into account the exciton states of the antenna. The exciton states were calculated for core antenna configuration in the form of a circular aggregate of N identical BChl molecules with the CN-symmetry.
V I, Novoderezhkin, A P, Razjivin
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Excitons trapped at impurity centers in highly ionic crystals

Physical Review B, 1985
It is shown that there are several examples of impurity ions in ionic host crystals all of whose localized excited states lie above the ionization energy of the impurity in the crystal (${\mathrm{SrF}}_{2}$:${\mathrm{Yb}}^{2+}$, ${\mathrm{BaF}}_{2}$:${\mathrm{Eu}}^{2+}$, and others).
, McClure, , Pedrini
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Trapped-hole centers in neutron-irradiated synthetic quartz

Physical Review B, 1994
EPR signals of two defect centers in neutron-irradiated high-purity quartz have been analyzed. The principal values and the anisotropy of the g tensors suggest an attribution to peroxy radicals and nonbridging oxygen hole centers.
Azzoni, C, MEINARDI, FRANCESCO, PALEARI, ALBERTO MARIA FELICE   +2 more
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