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This is a list of radioactive nuclides (sometimes also called isotopes), ordered by half-life from shortest to longest, in seconds, minutes, hours, days and years. Current methods make it difficult to measure half-lives between approximately 10 −19 and 10 −10 seconds.
Radioactive material, excepted package-instruments or articles UN 2912: 7: Radioactive material, low specific activity (LSA-I) [non fissile or fissile-excepted] Radon gas UN 2913: 7: Radioactive material, surface contaminated objects (SCO-I or SCO-II) [non fissile or fissile-excepted] UN 2914-(UN No. no longer in use) UN 2915: 7: Radioactive ...
Naturally occurring radioactive materials (NORM) and technologically enhanced naturally occurring radioactive materials (TENORM) consist of materials, usually industrial wastes or by-products enriched with radioactive elements found in the environment, such as uranium, thorium and potassium-40 (a long-lived beta emitter that is part of natural potassium on earth) and any of the products of the ...
A material derived from alien Protomolecule, used as hull protective plating for ships. The Rocinante was one such ship upgraded to use the material, whilst other ships were constructed with it as an original part of the hull. The material itself contains no protomolecule, having been developed by simply observing the molecular structure. Cargonite
The next group is the primordial radioactive nuclides. These have been measured to be radioactive, or decay products have been identified in natural samples (tellurium-128, barium-130). There are 35 of these (see these nuclides), of which 25 have half-lives longer than 10 13 years. With most of these 25, decay is difficult to observe and for ...
Radioactive material, low specific activity (LSA-III), fissile: UN 3326: 7: Radioactive material, surface contaminated objects (SCO-I or SCO-II), fissile: UN 3327: 7: Radioactive material, Type A package, fissile, non-special form UN 3328: 7: Radioactive material, Type B (U) package, fissile: UN 3329: 7: Radioactive material, Type B (M) package ...
Radioactive nonprimordial, but naturally occurring on Earth. 61 347 Carbon-14 (and other isotopes generated by cosmic rays) and daughters of radioactive primordial elements, such as radium, polonium, etc. 41 of these have a half life of greater than one hour. Radioactive synthetic half-life ≥ 1.0 hour). Includes most useful radiotracers. 662 989
bismuth (the radioactive isotope, 210 Bi, is found as a daughter product of Pb210 from Th in thorium minerals). These minerals emit alpha, beta and gamma ionising radiations, as well as radioactive gases such as radon and thoron. Appropriate precautions should be taken by collectors to store their specimens, especially to avoid inhaling radon gas..