thallium-activated

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• thallium — /thal ee euhm/, n. Chem. a soft, malleable, rare, bluish white metallic element: used in the manufacture of alloys and, in the form of its salts, in rodenticides. Symbol: Tl; at. wt.: 204.37; at. no.: 81; sp. gr.: 11.85 at 20°C. [1860 65; < NL,… …   Universalium

• radiation measurement — ▪ technology Introduction       technique for detecting the intensity and characteristics of ionizing radiation, such as alpha, beta, and gamma rays or neutrons, for the purpose of measurement.       The term ionizing radiation refers to those… …   Universalium

• scintillation counter — a device for detecting and measuring radioactivity, having a crystal scintillator, a photoelectric cell sensitive to the light from scintillations, and an amplifier. Also called scintillometer /sin tl om i teuhr/. [1945 50] * * * ▪ instrument… …   Universalium

• scintillator — A substance that emits visible light when hit by a subatomic particle or x or gamma ray. SEE ALSO: scintillation counter. liquid s. a liquid with the properties of a s., in which the substance whose radioactivity is to be measured can be… …   Medical dictionary

• scintillator — n. a substance that produces a fluorescent flash when struck by high energy radiation, such as beta or gamma rays. In medicine the most commonly used scintillator is a crystal of thallium activated sodium iodide, which forms the basis of a gamma… …   The new mediacal dictionary

• Poison — This article is about the type of substance. For other uses, see Poison (disambiguation). The EU s standard toxic symbol, as defined by Directive 67/548/EEC. The skull and crossbones has long been a standard symbol for poison. In the context of… …   Wikipedia

• Antidote — For other uses, see Antidote (disambiguation). An antidote is a substance which can counteract a form of poisoning.[1] The term ultimately derives from the Greek αντιδιδοναι antididonai, given against . The antidotes for some particular toxins… …   Wikipedia

• Rodenticide — A wild rat Rat poison redirects here. For the window manager, see ratpoison. Rodenticides are a category of pest control chemicals intended to kill rodents. Single feed baits are chemicals sufficiently dangerous that the first dose is sufficient… …   Wikipedia

• Scintillator — Scintillation crystal surrounded by various scintillation detector assemblies …   Wikipedia

• diagnosis — /duy euhg noh sis/, n., pl. diagnoses / seez/. 1. Med. a. the process of determining by examination the nature and circumstances of a diseased condition. b. the decision reached from such an examination. Abbr.: Dx 2. Biol. scientific… …   Universalium

• Industrial wastewater treatment — covers the mechanisms and processes used to treat waters that have been contaminated in some way by anthropogenic industrial or commercial activities prior to its release into the environment or its re use.Most industries produce some wet waste… …   Wikipedia