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  2. Uranium-238 - Wikipedia

    en.wikipedia.org/wiki/Uranium-238

    In a fission nuclear reactor, uranium-238 can be used to generate plutonium-239, which itself can be used in a nuclear weapon or as a nuclear-reactor fuel supply. In a typical nuclear reactor, up to one-third of the generated power comes from the fission of 239 Pu, which is not supplied as a fuel to the reactor, but rather, produced from 238 U. [5] A certain amount of production of 239

  3. Technetium - Wikipedia

    en.wikipedia.org/wiki/Technetium

    The fission of a gram of uranium-235 in nuclear reactors yields 27 mg of technetium-99, giving technetium a fission product yield of 6.1%. [28] Other fissile isotopes produce similar yields of technetium, such as 4.9% from uranium-233 and 6.21% from plutonium-239. [64]

  4. Isotopes of protactinium - Wikipedia

    en.wikipedia.org/wiki/Isotopes_of_protactinium

    All of the remaining radioactive isotopes have half-lives less than 1.6 days, and the majority of these have half-lives less than 1.8 seconds. This element also has five meta states , 217m Pa (t 1/2 1.15 milliseconds), 220m1 Pa (t 1/2 = 308 nanoseconds), 220m2 Pa (t 1/2 = 69 nanoseconds), 229m Pa (t 1/2 = 420 nanoseconds), and 234m Pa (t 1/2 ...

  5. List of radioactive nuclides by half-life - Wikipedia

    en.wikipedia.org/wiki/List_of_radioactive...

    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.

  6. List of nuclides - Wikipedia

    en.wikipedia.org/wiki/List_of_nuclides

    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 ...

  7. Commonly used gamma-emitting isotopes - Wikipedia

    en.wikipedia.org/wiki/Commonly_used_gamma...

    A fission product is a nucleus with approximately half the mass of a uranium or plutonium nucleus which is left over after such a nucleus has been "split" in a nuclear fission reaction. Caesium-137 is one such radionuclide. It has a half-life of 30 years, and decays by beta decay without gamma ray emission to a metastable state of barium-137 ...

  8. Actinide - Wikipedia

    en.wikipedia.org/wiki/Actinide

    Actinium-227 (half-life 21.77 years) occurs in all uranium ores, but in small quantities. One gram of uranium (in radioactive equilibrium) contains only 2 × 10 −10 gram of 227 Ac. [30] [57] Actinium-228 is a member of the radioactive thorium series formed by the decay of 228 Ra; [60] it is a β − emitter with a half-life of 6.15 hours.

  9. Gamma spectroscopy - Wikipedia

    en.wikipedia.org/wiki/Gamma_spectroscopy

    This spectrum was taken from a Uranium ore sample from Moab, Utah Gamma-ray spectroscopy is the qualitative study of the energy spectra of gamma-ray sources , such as in the nuclear industry, geochemical investigation, and astrophysics.

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