Strontium source materials

Inside the main cavity of the sensor is a strontium source contained in silver foil. The surface layer on the foil that contained the radioactive material must be very thin or the 3 particles will not be able to leave the surface. This tenuous layer protecting the radioactive material is rather vulnerable to mechanical abrasion, which could result in radioactive contamination. The radioactive strength of the... 

Clauer N. (1979) Relationship between the isotopic composition of strontium in newly formed continental clay minerals and their source material. Chem. Geol. 31, 325-334. 

In vivo counting systems are calibrated using tissue-equivalent phantoms. These phantoms have shapes similar to the human torso and are made of polystyrene or other tissue equivalent material. Standard radioactive strontium sources of known activity are inserted at locations where strontium would be expected to accumulate in a human body. Relationships are determined between the radioactive strontium activity measured by the detection system and the known activity in the phantom (Kozheurov 1994). 

For the measurement of thickness and coverage (coatings) of very thin materials, the absorption of alpha radiation may be used as a measure of weight/unit area. For moderately thick materials, the beta radiation emitted by °Sr (strontium-90),35Kr (kryplon-85), or 14C (carbon-14) is used. For greater thicknesses, bremsstrahlung or gamma sources are used. 

Bone and enamel, archaeological, strontium isotope analysis, 102-104 Bone chemistry, principles, 116-117 Bone materials in archaeological soils and sediments, 198, 200-204 Botswana prehistoric mines, specular hermatite source fingerprinting, 460-479... 

The Chernobyl accident involved the largest short-term release from a single source of radioactive materials to the atmosphere ever recorded. Of the materials released from the reactor core, four elements have dominated the short-term and long-term radiological situation in the affected areas of the USSR iodine (primarily caesium ( Cs, Cs), strontium (primarily Sr) and plutonium ( Pu, " Pu). In addition, highly radioactive fuel fragments (hot particles) were released. 

Use Radiation source in industrial thickness gauges, elimination of static charge, treatment of eye diseases, in radio-autography to determine the uniformity of material distribution, in electronics for studying strontium oxide in vacuum tubes, activation of phosphors, source of ionizing radiation in luminous paint, cigarette density control, measuring silk density, atomic batteries, etc. 

Strontium isotopes, reported as the ratio Sr/ Sr, have been used primarily in the study of human movement in the past. There are, however, a number of other potential applications usually involving the sourcing or proveniencing of other kinds of objects and materials such as pottery, stone, textiles, or animals. 

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