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GAUSSIAN BEAM [1 record]

Filter results by subject field Alphabetical list of terms

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Alphabetical list of terms

Record 1 2012-06-04

English

Subject field(s)
  • Chemistry
DEF

[In in situ microanalysis], diameter of the beam between which 68% of the electrons fall.

OBS

For Gaussian beam shapes this corresponds to the 2 [sigma]-value of the intensity distribution of the beam. Measurement can be carried out by scanning a beam across a sufficiently sharp edge and recording the transmitted electrons.

OBS

The word "sigma" must be replaced by the corresponding Greek letter.

French

Domaine(s)
  • Chimie
DEF

[En microanalyses in situ], diamètre du faisceau dans lequel on retrouve 68 % des électrons.

OBS

Pour des faisceaux de forme gaussienne, ceci correspond à la valeur de 2 [sigma] de la distribution d'intensité du faisceau. La mesure peut être faite en balayant un faisceau à travers une fente suffisamment fine et en enregistrant les électrons transmis.

OBS

Le mot «sigma» doit être remplacé par la lettre grecque correspondante.

Spanish

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