TERMIUM Plus^®

Record 1,  Textual support,  English

Record number: 1, Textual support number: 1 CONT

Karmen reported a hydrogen flame ionization detector sensitive only to compounds containing phosphorus, bromine, chlorine, and iodine. He noted that halogens or phosphorus increased the electrical conductivity of the flame in the presence of a wire, ceramic, or glass probe containing a sodium compound.  1, record 1, English, - probe

Record number: 1, Textual support number: 1 PHR

Glass probe.  2, record 1, English, - probe

Record 1,  Textual support,  French

Record 1,  Textual support,  Spanish

Record 2,  Textual support,  English

Record number: 2, Textual support number: 1 CONT

A number of devices are available to assay Contact Handled-Transuranic(CH-TRU) for fissile material. One assay technique employs a pulsed fast-neutron source of 10^{8 neutron/second} to provide interrogation neutrons that upon thermalization produce fissions in any fissile material. The fission neutrons, counted using^{3sup>He detector packs, are separated from the interrogation neutrons by their longer die-away time.  1, record 2, English, - interrogation%20neutron}

Record 2,  Textual support,  French

Record number: 2, Textual support number: 1 CONT

La quantification non destructive de la masse de noyaux lourds au moyen de la mesure neutronique active repose sur la stimulation de la réaction de fission et la mesure des neutrons qui en découlent. Cela suppose une source de particules interrogatrices (source isotopique, générateur de neutrons, accélérateur d’électrons...), une enceinte de thermalisation destinée à ralentir et à maintenir les neutrons interrogateurs à des énergies où les sections efficaces de fission associées aux isotopes recherchés sont optimales et, enfin, un dispositif de détection pour la mesure des neutrons. Le signal neutronique de fission est directement lié à la masse de matière qui a fissionné. Sa connaissance permet, étalonnage à l’appui, de quantifier cette masse.  1, record 2, French, - neutron%20interrogateur

Record 2,  Textual support,  Spanish

Record 3,  Textual support,  English

Record number: 3, Textual support number: 1 CONT

A cadmium sleeve on the outside of the detector reduces the background rate from low-energy neutrons in the room. A cadmium sleeve in the detector well removes thermal neutrons from the interrogation flux and improves the shielding between the^{³sup>He detectors and the AmLi source …  1, record 3, English, - interrogation%20flux}

Record 3,  Textual support,  French

Record number: 3, Textual support number: 1 DEF

Faisceau de particules élémentaires projetées sur un objet, par exemple un colis de déchets radioactifs, afin d’analyser et de mesurer les particules réémises et de déterminer ainsi la composition de cet objet.  2, record 3, French, - flux%20interrogateur

Record number: 3, Textual support number: 1 CONT

Mesure des neutrons prompts (méthode DDT). […] Après quelques périodes de ralentissement (la période de ralentissement dépend de la géométrie de la cellule, des matériaux la composant et enfin de la matrice du colis à contrôler), environ 700 [microsecondes] après la fin de l’impulsion neutronique, la majorité du flux interrogateur est à l’état thermique (0,025 [électronvolts]). À cet instant, peut débuter l’acquisition du signal prompt des fissions induites par ce flux thermalisé.  1, record 3, French, - flux%20interrogateur

Record 3,  Textual support,  Spanish

Record 4,  Textual support,  English

Record number: 4, Textual support number: 1 CONT

³He detectors have higher efficiency because of high neutron absorption cross-section for thermal neutrons and higher possible fill pressures up to 4 atm.  1, record 4, English, - hellium3%20detector

Record 4,  Textual support,  French

Record number: 4, Textual support number: 1 CONT

Les détecteurs à ³He sont, de loin, les plus utilisés pour les mesures neutroniques passives et actives, car ils présentent une excellente efficacité de détection tout en étant relativement insensibles aux rayonnements gamma.  2, record 4, French, - d%C3%A9tecteur%20%C3%A0%20h%C3%A9lium%203

Record 4,  Textual support,  Spanish

Record 5,  Textual support,  English

Record number: 5, Textual support number: 1 OBS

Form of detector using mw of carrier gas(He or Ar) in capillary gas chromatography.  1, record 5, English, - microwave%20induced%20plasma

Record 5,  Textual support,  French

Record 5,  Textual support,  Spanish

Record 6,  Textual support,  English

Record number: 6, Textual support number: 1 CONT

Kaye adapted a Beckman far-ultraviolet DK-2 spectrophotometer as a gas chromatographic effluent detector to record the spectra of eluted, absorbing materials. Using heated flow-through cells... coupled directly to the thermal conductivity cell' s outlet, he found that absorptivities of most organic vapors were sufficiently large to permit quantitative analysis, and in some instances identification, where specific absorption patterns could be attributed directly to a functional group in certain molecular species. Furthermore, the sensitivity of the far-ultraviolet detector for many compounds possessing intense absorption bands exceeds that of the normal thermal conductivity detector and, in some cases, the hydrogen flame ionization detector.  1, record 6, English, - ultraviolet%20spectrophotometer%20detector

Record 6,  Textual support,  French

Record 6,  Textual support,  Spanish

Record 7,  Textual support,  English

Record number: 7, Textual support number: 1 CONT

Recently, Behrendt noted that the high resolution afforded by open tubular columns is often of no help in analysis since the samples handled are too small to permit further examination of separated components. To circumvent this disadvantage, he developed an infrared microspectrometer using a molecular beam detector to monitor chromatographic open-tube effluents.  1, record 7, English, - molecular%20beam%20detector

Record 7,  Textual support,  French

Record 7,  Textual support,  Spanish