primary electron

primary electron

[′prī‚mer·ē i′lek‚trän]
(electronics)
An electron which bombards a solid surface, causing secondary emission.
References in periodicals archive ?
The validity of the density scaling method in primary electron transport for photon and electron beams.
In case that the ionized ion traps an electron nearby and emits a scintillation photon, one may measure the primary electron in coincidence with the scintillation photon.
The surface relief was visualized by scanning electron microscopy using secondary electron detection mode with resolution down to 2 nm at the primary electron energy of 3 keV [28].
In the case of the BChl dimer, [(BChl).sub.2]--the special pair, which is the primary electron donor of the RC protein (see the next paragraph)--this value is about 860 nm.
The nanoprobe will perform chemical analyzes of surface conductive materials, semi-conductors and insulators by detecting Auger spectrometry electrons emitted from the surface after ionization induced by the primary electron beam.
As the primary electron donor, water is oxidized to release dioxygen and protons in the electron transport chain.
If there is a mismatch or misalignment between the SEM scanning lines and the specimen grating, the difference in the amount of emitted secondary electrons per primary electron will produce the SEM moire fringes which consists of periodically distributed bright and dark parts [22].
The AES measurements were performed with a primary electron beam of energy 2 keV and anode current 15 [micro]A, while the electrons were collected and analyzed by a Varian cylindrical mirror analyzer (CHA).
This hole is scattered back into the NM layer, but it does not interfere with the primary electron. In order to take place an interference at the NM layer, the hole should be reflected at the NM/FS interface, be propagated into the electron state (5 in Figure 1(b)) by the FS order parameter, and then propagate into the NM layer as an electron.
The pion-decay gamma-ray spectrum could ride on top of the continuum deriving from primary electron bremsstrahlung.
In the reaction centers of the two photosystems excitation energy generated in the antenna as a result of light absorption is converted into electrochemical potential, through the transfer of the high energy electron located in excited specialized chlorophyll molecules (the primary electron donors) to neighbouring acceptor molecules (the primary electron acceptors).
The analytical resolution of the device is comparable to the instrument's primary electron beam diameter--ten times the spatial resolution of the most sensitive x-ray systems.