Noun
electron that is not attached to an atom or ion or molecule but is free to move under the influence of an electric field
Source: WordNetBesides these accelerators there is also the free electron laser FLASH, and its offspring XFEL, which is under construction since 2009. Source: Internet
European XFEL main The European x-ray free electron laser (European XFEL) is an X-ray laser currently under construction. Source: Internet
If the electric field is strong enough, the free electron gains sufficient energy to liberate a further electron when it next collides with another molecule. Source: Internet
First, there is scattering from the wire boundaries, whose effect will be very significant whenever the wire width is below the free electron mean free path of the bulk material. Source: Internet
Negatively charged ions are produced when a free electron collides with an atom and is subsequently trapped inside the electric potential barrier, releasing any excess energy. Source: Internet
FLASH FLASH (Free-electron -LASer in Hamburg) is a superconducting linear accelerator with a free electron laser for radiation in the vacuum-ultraviolet and soft X-ray range of the spectrum. Source: Internet