نتایج جستجو برای: nonresonant
تعداد نتایج: 1070 فیلتر نتایج به سال:
We examine the quantum spin state of a single nitrogen-vacancy (NV) center in diamond at room temperature as it makes a transition from the orbital ground state (GS) to the orbital excited state (ES) during nonresonant optical excitation. While the fluorescence readout of NV-center spins relies on conservation of the longitudinal spin projection during optical excitation, the question of quantu...
ar X iv : h ep - p h / 98 07 44 1 v 1 2 1 Ju l 1 99 8 Signal for CP violation in B ± → PP̄π ± decays
We analyze the partial rate asymmetry in B ± → P ¯ P π ± decays (P = π + , K + , π 0 , η) which results from the interference of the nonresonant decay amplitude and the resonant amplitude for B ± → χc0π ± followed by the decay χc0 → P ¯ P. The CP violating phase γ can be extracted from the measured asymmetry. We find that the partial rate asymmetry for B ± → π + π − π ± is 0.33 sinγ, while for ...
Excitation of localized and delocalized surface plasmon resonances can be used for turning excellent reflectors of visible light, such as gold and silver, into efficient absorbers, whose wavelength, polarization or angular bandwidths are however necessarily limited owing to the resonant nature of surface plasmon excitations involved. Nonresonant absorption has so far been achieved by using comb...
We present a detailed theoretical analysis on the quantum efficiency of a resonant cavity enhanced ~RCE! GaAs homojunction work function internal photoemission far-infrared ~FIR! detector. The quantum efficiency under both resonant and nonresonant conditions has been calculated. All the detector parameters are optimized under the realistically nonresonant condition. The further investigation of...
Quantum-mechanical calculations are reported for hydrogen recombination in the presence of a chemically inert spectator. The calculations employ a square integrable Sturmian basis set to provide a discrete representation of the H2 continuum. Direct three-body recombination is approximated by computing transitions from the nonresonant continuum. Resonant and nonresonant states are handled on equ...
We describe a quasioptical 94 GHz kW pulsed electron paramagnetic resonance spectrometer featuring pi/2 pulses as short as 5 ns and an instantaneous bandwidth of 1 GHz in nonresonant sample holders operating in induction mode and at low temperatures. Low power pulses can be as short as 200 ps and kilowatt pulses as short as 1.5 ns with timing resolution of a few hundred picoseconds. Phase and f...
Fluorescent labels are well suited as tracers for cancer drug monitoring. Identifying cellular target regions of these drugs with a high resolution is important to assess the working principle of a drug. We investigate the applications of label-free nonresonant four-wave mixing (NR-FWM) microscopy in biological imaging in combination with fluorescence imaging of fluorescently labeled cancer dru...
We present the results of a five-dimensional resonant amplitude analysis of the Λc →pK −π+ system based on 946 ± 38 reconstructed decays. These data were produced in 500 GeV/c π-N interactions by Fermilab experiment E791. We report measurements of the amplitudes for Λc decay into nonresonant pK −π+ and to pK ∗0 (890), ∆++(1232)K−, and Λ(1520)π+ and we comment on other possible resonant enhancem...
We calculate the {\em exact} time-resolved ARPES spectrum of a two-band model semiconductor driven out equilibrium by resonant and nonresonant laser pulses, highlighting effects phonon-induced decoherence relaxation. Resonant} excitations initially yield replica valence} band shifted upward energy exciton peak in photoabsorption. This phase is eventually destroyed decoherence: valence-band lowe...
The analytical structure, absolute value, and angular anisotropy of the double differential cross section for bremsstrahlung at nonresonant inelastic scattering an X-ray photon by a multicharged helium-like atomic ion have been theoretically predicted.
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