electron photon cascade

См. также в других словарях:

• cascade shower — noun : a cosmic ray shower in which a high energy electron produces one or more photons that convert into electrons and positrons, these secondary electrons producing the same effect as the primary, the shower thus building up until the level of… …   Useful english dictionary

• Quantum cascade laser — Quantum cascade lasers (QCLs) are semiconductor lasers that emit in the mid to far infrared portion of the electromagnetic spectrum and were first demonstrated by Jerome Faist, Federico Capasso, Deborah Sivco, Carlo Sirtori, Albert Hutchinson,… …   Wikipedia

• Laser à cascade quantique — Le laser à cascade quantique (abrégé en QCL pour Quantum Cascade Laser) est un laser à semi conducteur, pouvant émettre de l infra rouge moyen à l infra rouge lointain dont le principe d’émission par cascade quantique a été initialement proposé… …   Wikipédia en Français

• Photoemission electron microscopy — (PEEM, also called photoelectron microscopy, PEM) is a widely used type of emission microscopy. PEEM utilizes local variations in electron emission to generate image contrast. The excitation is usually produced by UV light, synchrotron radiation… …   Wikipedia

• Collision cascade — A classical molecular dynamics computer simulation of a collision cascade in Au induced by a 10 keV Au self recoil. This is a typical case of a collision cascade in the heat spike regime. Each small sphere illustrates the position of an atom, in… …   Wikipedia

• Two-photon absorption — (TPA) is the simultaneous absorption of two photons of identical or different frequencies in order to excite a molecule from one state (usually the ground state) to a higher energy electronic state. The energy difference between the involved… …   Wikipedia

• Environmental scanning electron microscope — Wool fibers imaged in an ESEM by the use of two symmetrical plastic scintillating backscattered electron detectors …   Wikipedia

• Georgiy Zatsepin — Georgiy Timofeyevich Zatsepin ( ru. Георгий Тимофеевич Зацепин) (born OldStyleDate|May 28|1917|May 15 in Moscow) Soviet/Russian astrophysicist, known for his works in cosmic rays physics and neutrino astrophysics. Zatsepin graduated from the… …   Wikipedia

• radiation — radiational, adj. /ray dee ay sheuhn/, n. 1. Physics. a. the process in which energy is emitted as particles or waves. b. the complete process in which energy is emitted by one body, transmitted through an intervening medium or space, and… …   Universalium

• Laser diode — Top: a packaged laser diode shown with a penny for scale. Bottom: the laser diode chip is removed from the above package and placed on the eye of a needle for scale …   Wikipedia

• spectroscopy — spectroscopist /spek tros keuh pist/, n. /spek tros keuh pee, spek treuh skoh pee/, n. the science that deals with the use of the spectroscope and with spectrum analysis. [1865 70; SPECTRO + SCOPY] * * * Branch of analysis devoted to identifying… …   Universalium