We investigate the QED Compton process (QEDCS) in $e p o e \\gamma p$ and $ep o e \\gamma X$, together with the major background coming from the virtualCompton scattering (VCS), where the photon is emitted from the hadronic vertex.We suggest new kinematical constraints which suppress...
Since the molecule movement represents charge displacement, electromagnetic radiation (photon particles) is emitted. These photons move at the speed of light and behave according to the known optical principles. They can be deflected, focused with a lens, or reflected by reflective surfaces. The ...
In simple terms, photosynthesis is the process by whichlight energyis used to convert chemical substances to a more energy-filled state. In all photosynthetic organisms, it involves the capture of the energy of a photon of light by a pigment molecule, the formation of an excited electron, and...
When the electron in an atom is excited its potential energy is precisely defined or quantised and when this electron drops to a lower energy state a precise packet of energy is emitted as a photon. The frequency, v, and so the wavelength, λ, of the emitted photon is given by the ...
’s are electrically charged and therefore radiate photons. when a real or virtual photon is emitted from the w one has more than just two w propagators in the matrix element and the question is how to apply the pole expansion in such a case. here, however, one can exploit a partial-...
“When more electrons are in the trion state than their original electron state, a condition called population inversion occurs,” Ning said. “More photons can be emitted than absorbed, leading to a process called stimulated emission and optical amplification or gain. ...
The HEGS exhibits a much broader infrared absorption than common glass systems, which can be attributed to be high-frequency optical branch phonons or allowable multi-phonon processes caused by phonon broadening in the system. A broadened phonon-assisted wideband radiation (BPAWR) is induced if the...
Atom-field interaction is treated in an ab initio way prescribed by quantum electrodynamics. We use the procedure to calculate probability distributions of absorbed photons in the regime of tunneling ionization. We analyze evolution of the reduced photon density matrix describing the state of the ...
emittedphotonsaccompanyingultra-relativisticpositronplanarchannelingthrougha crystalwhichisperiodicallybent,asitisillustratedinfigure1.Thisphenomenonwas describedrecentlyin[1,2]andwascalledAcousticallyInducedRadiation(AIR).It wasnotedthattheperiodicpatternofcrystalbendings(whichcanbeachievedeither ...
All two-quantum processes require an intermediate state in which one photon is absorbed or emitted and the atom is left in an excited state. The fine structure of the 2P states of the exciton from the top valence level in CdS has been studied. In this experiment, a visible dye laser and...