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  2. Free neutron decay - Wikipedia

    en.wikipedia.org/wiki/Free_neutron_decay

    For the free neutron, the decay energy for this process (based on the rest masses of the neutron, proton and electron) is 0.782 343 MeV.That is the difference between the rest mass of the neutron and the sum of the rest masses of the products.

  3. International Space Station - Wikipedia

    en.wikipedia.org/wiki/International_Space_Station

    The US Orbital Segment also hosts the Columbus module contributed by the European Space Agency and built in Germany, the Kibō module contributed by Japan and built at the Tsukuba Space Center and the Institute of Space and Astronautical Science, along with the Canadarm2 and Dextre, a joint Canadian-U.S. endeavor. All of these components were ...

  4. Isotopes of neodymium - Wikipedia

    en.wikipedia.org/wiki/Isotopes_of_neodymium

    In all, 35 radioisotopes of neodymium have been characterized up to now, with the most stable being naturally occurring isotopes 144 Nd (alpha decay, a half-life (t 1/2) of 2.29 × 10 15 years) and 150 Nd (double beta decay, t 1/2 of 9.3 × 10 18 years), and for practical purposes they can be considered to be stable as well.

  5. Cobalt-60 - Wikipedia

    en.wikipedia.org/wiki/Cobalt-60

    The decay scheme of 60 Co and 60m Co.. The diagram shows a simplified decay scheme of 60 Co and 60m Co. The main β-decay transitions are shown. The probability for population of the middle energy level of 2.1 MeV by β-decay is 0.0022%, with a maximum energy of 665.26 keV.

  6. Project Excalibur - Wikipedia

    en.wikipedia.org/wiki/Project_Excalibur

    The movement of space-based assets in well-known orbital paths also made them much easier to attack and exposed to attack for longer times compared to the same systems being used to attack ICBMs, whose initial positions were unknown and disappeared in minutes. [79] The report noted this was particularly true of pop-up X-ray lasers. They noted that:

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

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

    isotope half-life 10 −6 seconds ; lead-196m2 <1 polonium-192m ~1 radon-210m3: 1.04 thorium-219: 1.05 polonium-206m2: 1.05 radon-210m2: 1.06 curium-243m: 1.08 actinium-218

  8. 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

  9. Branching fraction - Wikipedia

    en.wikipedia.org/wiki/Branching_fraction

    In particle physics and nuclear physics, the branching fraction (or branching ratio) for a decay is the fraction of particles that decay by an individual decay mode or with respect to the total number of particles which decay. It applies to either the radioactive decay of atoms or the decay of elementary particles. [1]