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  2. Neutron source - Wikipedia

    en.wikipedia.org/wiki/Neutron_source

    Some isotopes undergo spontaneous fission (SF) with emission of neutrons.The most common spontaneous fission source is the isotope californium-252. 252 Cf and all other SF neutron sources are made by irradiating uranium or a transuranic element in a nuclear reactor, where neutrons are absorbed in the starting material and its subsequent reaction products, transmuting the starting material into ...

  3. Californium neutron flux multiplier - Wikipedia

    en.wikipedia.org/wiki/Californium_neutron_flux...

    A californium neutron flux multiplier (CFX) is a source of neutrons for research purposes. It contains a small amount of californium-252 and several plates of highly enriched uranium (uranium-235) in a subcritical configuration. As the californium undergoes spontaneous nuclear decay, it

  4. Isotopes of californium - Wikipedia

    en.wikipedia.org/wiki/Isotopes_of_californium

    Californium-252 production diagram. Californium-252 (Cf-252, 252 Cf) undergoes spontaneous fission with a branching ratio of 3.09% and is used in small neutron sources. Fission neutrons have an energy range of 0 to 13 MeV with a mean value of 2.3 MeV and a most probable value of 1 MeV. [11]

  5. Today’s NYT ‘Strands’ Hints, Spangram and Answers for ...

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    In today's puzzle, there are eight theme words to find (including the spangram). Hint: The first one can be found in the top-half of the board. Here are the first two letters for each word: BU. DI ...

  6. Californium - Wikipedia

    en.wikipedia.org/wiki/Californium

    Though californium-251 has the longest half-life, its production yield is only 10% due to its tendency to collect neutrons (high neutron capture) and its tendency to interact with other particles (high neutron cross section). [23] 252 Cf is a very strong neutron emitter, which makes it extremely radioactive and harmful.

  7. Einsteinium - Wikipedia

    en.wikipedia.org/wiki/Einsteinium

    Its density of 8.84 g/cm 3 is lower than that of californium (15.1 g/cm 3) and is nearly the same as that of holmium (8.79 g/cm 3), despite einsteinium being much heavier per atom than holmium. Einsteinium's melting point (860 °C) is also relatively low – below californium (900 °C), fermium (1527 °C) and holmium (1461 °C).

  8. Award-winning radioisotope separation methods at ORNL are ...

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    Californium-252 from HFIR is used to treat brain and cervical cancers, to start up nuclear reactors, to help find belowground oil or gas and to detect hidden explosives and landmines.

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