TERMIUM Plus^®

Record 1,  Textual support,  English

Record number: 1, Textual support number: 1 DEF

An analytical technique analogous to x-ray diffraction in which an incident beam of neutrons is scattered by the atoms of a crystal.  2, record 1, English, - neutron%20diffraction

Record number: 1, Textual support number: 1 CONT

Because elements that are close to each other in the Periodic Table differ considerably in their neutron-scattering ability, neutron diffraction is capable of distinguishing between them. For example, carbon nitrogen, and oxygen atoms can be readily identified by neutron diffraction, where as they appear almost identical by the x-ray method. More accurate determination of the bond lengths of light atoms and distribution of molecular bonding electrons is also possible. Details of molecular structure that can only be inferred by other techniques can often be observed directly by neutron diffraction. Investigations using this method include hydrogen bonding, so-called metal cluster compounds(C. H. M relationships) and electronic charge distributions.  2, record 1, English, - neutron%20diffraction

Record 1,  Textual support,  French

Record number: 1, Textual support number: 1 CONT

En réalité la seule méthode capable de déceler la structure atomique de la plupart des macromolécules est la diffraction des rayons X par des cristaux. [...] La diffraction neutronique est surtout utilisée pour placer les atomes d'hydrogène, trop légers pour être normalement détectés par diffraction des rayons X, dans des modèles atomiques obtenus par cette dernière méthode.  4, record 1, French, - diffraction%20neutronique

Record 1,  Textual support,  Spanish

Record number: 1, Textual support number: 1 DEF

Difracción de los neutrones térmicos que por tener una longitud de onda asociada aproximadamente igual a la distancia entre los átomos de los cristales, son difractados por éstos.  1, record 1, Spanish, - difracci%C3%B3n%20de%20neutrones

Record 2,  Textual support,  English

Record number: 2, Textual support number: 1 CONT

Powder diffraction is X-ray diffraction on a powdered crystalline substance. Powder X-ray diffraction gives less information than single crystal X-ray diffraction, but is much simpler and faster.  1, record 2, English, - powder%20diffraction

Record number: 2, Textual support number: 1 PHR

Neutron, X-ray powder diffraction.  2, record 2, English, - powder%20diffraction

Record 2,  Textual support,  French

Record number: 2, Textual support number: 1 CONT

Diffraction des poudres. En diffraction des échantillons polycristallins, on irradie une fine poudre par un faisceau monochromatique, par exemple le rayonnement d'un tube à anode de cuivre. On observe de cette manière, à des angles déterminés, nommés angles de diffraction, les faisceaux diffractés par les plans cristallins. La relation entre l'angle de diffraction et la distance interatomique du réseau cristallin est donnée par la loi de Bragg [...]  1, record 2, French, - diffraction%20des%20poudres

Record 2,  Textual support,  Spanish

Record 3,  Textual support,  English

Record number: 3, Textual support number: 1 CONT

Recent kinetic in situ neutron diffraction measurements of the crystallization and phase formation processes in amorphous metallic alloys have shown that it is possible to create entirely new, intermetallic compounds with extremely novel structures and magnetic properties. The technique therefore offers the opportunity of probing the interplay of structural, magnetic and electronic properties in more detail than ever before.  2, record 3, English, - intermetallic%20compound

Record 3,  Textual support,  French

Record number: 3, Textual support number: 1 DEF

Composés ne comportant que des métaux.  2, record 3, French, - interm%C3%A9tallique

Record number: 3, Textual support number: 1 CONT

Nous avons mentionné que les quasi-cristaux sont durs, mais fragiles. Les duretés caractéristiques, appréciables pour un alliage léger, sont comparables aux duretés des intermétalliques comme Al-Fe ou des aciers martensitiques de haut de gamme.  3, record 3, French, - interm%C3%A9tallique

Record 3,  Textual support,  Spanish