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POLYCHROMATIC BEAM [3 records]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 2021-07-29

English

Subject field(s)
  • Radiological Physics (Theory and Application)
CONT

Since attenuation coefficients are very dependent on x-ray energy, the altered energies of a polychromatic beam lead to different attenuations of the same material.

French

Domaine(s)
  • Physique radiologique et applications

Spanish

Save record 1

Record 2 2010-12-09

English

Subject field(s)
  • Physics of Solids
  • Radiological Physics (Theory and Application)
DEF

A method of studying crystalline structures by x-ray diffraction, in which a finely collimated beam of polychromatic x-rays falls on a single crystal whose orientation can be set as desired, and diffracted beams are recorded on a photographic film.

French

Domaine(s)
  • Physique des solides
  • Physique radiologique et applications
CONT

Outre [l’] expérience classique de biocristallographie, deux techniques sont développées en parallèle et sont exclusives du rayonnement synchrotron. La première est la méthode MAD (multiple wavelength anomalous diffraction) qui consiste à exploiter la diffusion anomale d’un atome lourd inclus dans la protéine et à déterminer sa position, puis à aider au phasage, à partir de la collecte de données autour du seuil d’absorption. La seconde, méthode de Laue, consiste à travailler avec un faisceau blanc, ce qui permet des collectes de données avec des temps d’exposition excessivement courts, de la microseconde à la picoseconde.

Spanish

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Record 3 2003-02-04

English

Subject field(s)
  • Optical Telecommunications
DEF

In optical communication systems, the multiplexing of channels on a single transmission medium; e. g. using each color in a transmitted polychromatic light beam as a channel in optical fiber of bundle of fibers.

Key term(s)
  • colour-division multiplexing

French

Domaine(s)
  • Télécommunications optiques

Spanish

Save record 3

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