نتایج جستجو برای: the electronic absorption spectral lin
تعداد نتایج: 16136566 فیلتر نتایج به سال:
This study is motivated by the recent discovery of the first all-boron fullerene analogue, a B40 cluster with D(2d) point-group symmetry, dubbed borospherene (Nat. Chem., 2014, 6, 727). Insight into the electronic structures and spectral properties of B40 is timely and important to understand the borospherene and the transition from open-ended plate or ribbon-like structures to a hollow-cage st...
The dissipative electromagnetic energy absorption of tailored metamaterials can be exploited to improve the spectral sensitivity and selectivity of thermal detectors. The desired detector characteristics are engineered by tuning the singleor multiband absorption by resonance frequency, magnitude, and spectral bandwidth, strongly depending on the geometrical design of metamaterials. Here, the op...
Time-resolved X-ray absorption spectroscopy was performed for aqueous ammonium iron(III) oxalate trihydrate solutions using an X-ray free electron laser and a synchronized ultraviolet laser. The spectral and time resolutions of the experiment were 1.3 eV and 200 fs, respectively. A femtosecond 268 nm pulse was employed to excite [Fe(III)(C2O4)3](3-) in solution from the high-spin ground electro...
Optical pump-induced dynamics of the highly asymmetric carotenoid peridinin in methanol was studied by dispersed pump-probe, pump-dump-probe, and pump-repump-probe transient absorption spectroscopy in the visible region. Dispersed pump-probe measurements show that the decay of the initially excited S2 state populates two excited states, the S1 and the intramolecular charge-transfer (ICT) state,...
Forest ecosystems play a key role in sustaining life on this planet, given their functions carbon storage, oxygen production, and the water cycle. To date, calculations of biomass absorption capacity forest ecosystems—especially tropical rainforests—have been quite limited, especially Vietnam. By applying remote sensing materials, geographic information systems (GIS) facilitate synchronized est...
Peroxy radicals form a class of important intermediates in oxidation chemistry. In recent years much effort has been put into the study of the kinetics of peroxy radicals largely via monitoring their broad and structureless A A UV absorption transition. The A A electronic transition of the peroxies, residing in the near-IR region, has also been observed, but due to the relative inaccessibility ...
We present sensitive, high-resolution λ21-cm VLBA+VLA observations of the radio jet and nuclear HI absorption in NGC 4151. The 25-mas (1.6-pc) resolution continuum image reveals a highly collimated radio jet, underlying the discrete components seen previously with MER-LIN and the VLA. Spatially and kinematically complex HI absorption is detected against the whole 3-pc extent of the continuum co...
Nowadays, in business terms, the most important development to arise from the current swathe of technological advances is the electronic commerce. The electronic commerce is one of the most obvious interests in the digital economy. Electronic market in comparison with traditional market has an important challenge about more competition pressures and less customer's loyalty. Therefore in the ele...
Abstract High-resolution absorption, dispersed fluorescence emission, and photoionization cross sections are presented for gas-phase adamantane excited by synchrotron radiation in the exciting-photon energy range of 6–30 eV. Relative absolute absorption so-far unmatched resolution down to 0.27 cm −1 line width region from 6.4–28 eV shown along with newly discovered vibronic substructures around...
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