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Что (кто) такое gallium$30740$ - определение
![Bauxite mine in [[Jamaica]] (1984)](https://commons.wikimedia.org/wiki/Special:FilePath/Bauxite Jamaica 1984.jpg?width=200 "Bauxite mine in [[Jamaica]] (1984)")
![Owing to their low melting points, gallium and its alloys can be shaped into various 3D forms using [[3D printing]] and [[additive manufacturing]]](https://commons.wikimedia.org/wiki/Special:FilePath/Gallium alloy 3D prints (26519727708).jpg?width=200 "Owing to their low melting points, gallium and its alloys can be shaped into various 3D forms using [[3D printing]] and [[additive manufacturing]]")
Википедия
Natural gallium (31Ga) consists of a mixture of two stable isotopes: gallium-69 and gallium-71. The most commercially important radioisotopes are gallium-67 and gallium-68.
Gallium-67 (half-life 3.3 days) is a gamma-emitting isotope (the gamma ray emitted immediately after electron capture) used in standard nuclear medical imaging, in procedures usually referred to as gallium scans. It is usually used as the free ion, Ga3+. It is the longest-lived radioisotope of gallium.
The shorter-lived gallium-68 (half-life 68 minutes) is a positron-emitting isotope generated in very small quantities from germanium-68 in gallium-68 generators or in much greater quantities by proton bombardment of 68Zn in low-energy medical cyclotrons, for use in a small minority of diagnostic PET scans. For this use, it is usually attached as a tracer to a carrier molecule (for example the somatostatin analogue DOTATOC), which gives the resulting radiopharmaceutical a different tissue-uptake specificity from the ionic 67Ga radioisotope normally used in standard gallium scans.
