|
|
|
|
|
|
|
|
|
Thermionic emission (rt)
| Глоссарий терминов по технологиям неразрушающего контроля (NDT) |
The emission of electrons from the surface of a heated material by virtue of their thermal energy.
|
|
|
Linear energy transfer (let) (rt), английский
The energy lost by a charged particle per unit distance of material traversed. it can be expressed as electron volts per meter, or some convenient multiple or submultiple, such as kev per millimeter.
Fluorescent (rt), английский
The emission of electromagnetic radiation by a substance as the result of the absorption of electromagnetic or corpuscular radiation having greater unit energy than that of the fluorescent radiation. fluorescence is characterized by the fact that it occurs only so long as the stimulus responsible for it is maintained. the characteristic x-radiation emitted, as a result of absorption of x-rays of higher frequency is a typical example of fluorescence. property of emitting visible light as the result of and only during, the absorption of radiant energy from some other source (i.e., black light).
|
|
|
|
|
|
|
