<title>Temperature dependence of light-induced absorption in reduced Co:KNSBN crystal with multiple-shallow traps</title>
3
Citation
0
Reference
10
Related Paper
Citation Trend
Abstract:
We studied the dependence of light-induced absorption on temperature in reduced Co:KNSBN crystal. The changes of light-induced absorption decrease as temperature decrease at high pump intensity, which can not be explained by previous two centers model. The dynamic behaviors of light-induced absorption reveal that there are multiple shallow levels in crystals. The thermal exciting rate and active energy of shallow levels are determined by the dependence of dynamics of light-induced absorption on pump intensity and temperature, respectively. The deep levels of reduced Co:KNSBN can be shown in transmission spectra of crystal. A model assuming both electron and hole with three shallow traps is used to explain our experimental results.Keywords:
Crystal (programming language)
Intensity
Acceleration records and their corresponding intensity materials of recent destructive earthquakes in West China were collected in this article.The relativity between various strong ground motion indices and intensity was compared with a method based on hypothesis testing,which indicated that spectral intensity with 20% damping ratio(SI0.2) was the index that most significantly related to intensity.As an improvement,SI0.2 was modified depending on the predominant period of spectral acceleration and the site condition of the station.The instrumental intensity determined by modified SI0.2 was identical with the actual intensity for 70 percents of the stations,which indicated that modified SI0.2 was efficient and reliable in instrumental intensity determination.So modified SI0.2 defined in this article was proposed to determine the instrumental intensity for destructive earthquakes in West China.
Intensity
Radiant intensity
Spectral acceleration
Cite
Citations (3)
The K-absorption spectra of sulfur and metal ions in a series of transition-metal disulfides MS2 (M=Fe, Co, Ni) have been measured with two-crystal spectrometers. Considerable differences in the profiles are observed between the spectra of metal and sulfur ions, while the respective spectra are alike among different compounds. Consideration about the similarity and the dissimilarity in the spectral features suggests that the simple energy-band picture or the simple molecular-orbital picture is not adequate for the explanation of the observed spectra.
Crystal (programming language)
Cite
Citations (10)
Intensity
Epicenter
Cite
Citations (12)
FeSO4.4H2O is an important single crystal and there are many potential applications in optical aspect.The research about absorption spectrum of FeSO4.4H2O crystal playS a significant promoter action on its applications.This article quots an average covalent factor N and considers the electrostatic and cubic crystal field interaction.Crystal absorption spectra of the FeSO4.4H2O crystal is calculated and by using the complete diagonalizing method and some major absorption peaks of experimental results are assigned.The result shows that the calculated results are in good agreement with the experiments of the absorption spectra
Crystal (programming language)
Cite
Citations (0)
We investigate the effect of exciton coupling on the optical absorption spectra of polymer molecules under conditions of strong inhomogeneous broadening. It is shown that the dependence of the maximum in the rescaled absorption spectrum on the number of monomers is determined by their resonant exciton coupling and is insensitive to inhomogeneous broadening. Thus the absorption spectrum can be used to determine optical interactions between monomers. Using our theory and semiempirical calculations we determine exciton coupling between adjacent AT pairs in DNA to be 0.04 eV and discuss exciton localization in DNA hairpins composed of AT pairs.
Cite
Citations (10)
Cite
Citations (0)
Intensity
Cite
Citations (138)
The Er3 /Yb3+:KGW crystal with the dimensions of 30 mm x 25 mm x 15 mm was grown from K2W2O7 solvent by modified Czochralski method. The absorption spectrum was measured at room temperature and its absorption peaks were assigned. The emission spectrum was obtained under the excitation of 980 nm. There are two broad emission bands at 1024 and 1535 nm, whose FHWM are 60 and 36 nm respectively. It shows that this crystal is suitable for InGaAs LD pumping, and may be a promising laser crystal tunable at near 1 024 and 1 535 nm.
Crystal (programming language)
Czochralski method
Cite
Citations (0)
We report structural and dynamical properties of water confined within reverse micelles (RMs) ranging in size from R = 10 A to R = 23 A as determined from molecular dynamics simulations. The low-frequency infrared spectra have been calculated using linear response theory and depend linearly on the fraction of bulklike water within the RMs. Furthermore, these spectra show nearly isosbestic behavior in the region near 660 cm(-1). Both of these characteristics are present in previously measured experimental spectra. The single dipole spectra for interfacial trapped, bound, and bulklike water within the RMs have also been calculated and show region-dependent frequency shifts. Specifically, the bound and trapped water spectra have a peak at lower frequencies than that for the inner core water. We therefore assign the low-frequency band in the IR spectra to bound and trapped interfacial water. Finally, region-dependent hydrogen bonding profiles and spatial distribution functions are also presented.
Bound water
Cite
Citations (66)
Burst spectra over a restricted energy range look like a power law plus some curvature. Such spectra can be well fit by most models or mechanisms, and hence reveal little of the underlying physics. With the launch of the Compton Gamma Ray Observatory, we can construct composite spectra from tens of keV to tens of GeV. This wide spectral range yields burst spectra that can sharply confront models. We have constructed wide-range composite spectra for several bursts, two of which are presented here: GRB910601 and GRB910814. The energy ranges are 28 keV to 10 MeV and 100 keV to 200 MeV. These spectra were constructed from spectra by BATSE, EGRET, COMPTEL, and OSSE. The spectral shape of GRB910601 shows a continuous turnover between 100 keV and 1 MeV, with peak νFν at 500 keV. The spectral shape of GRB910814 is dominated by a sharp and strong spectral break near 2 MeV. In addition to these two broad spectra, we have derived an ‘average’ spectral shape for 20 bright bursts from 40 keV to 1500 keV. This average spectra will be useful for studies of the red shifting of average spectra.
Spectral shape analysis
Spectral slope
Cite
Citations (1)