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  • Frisch–Peierls memorandum - Wikipedia
    The memorandum contained some of the first calculations about the size of the critical mass of fissile material needed for an atomic bomb It revealed that the amount required might be small enough to incorporate into a bomb that could be delivered by air It also anticipated the strategic and moral implications of nuclear weapons
  • SB 20. 5-20. 6 Flashcards - Quizlet
    Study with Quizlet and memorize flashcards containing terms like Select the statements that correctly describe the process of nuclear fission , What is the definition of critical mass?, Select the correct statements regarding an atomic bomb and more
  • Enriched uranium - Wikipedia
    Enriched uranium is a type of uranium in which the percent composition of uranium-235 (written 235 U) has been increased through the process of isotope separation Naturally occurring uranium is composed of three major isotopes: uranium-238 (238 U with 99 2732–99 2752% natural abundance), uranium-235 (235 U, 0 7198–0 7210%), and uranium-234 (234 U, 0 0049–0 0059%)
  • Manhattan Project: Processes gt; Bomb Design, Development, and . . .
    A smaller critical mass meant that less fissionable material had to be produced and, as a result, that smaller or fewer production plants would be needed Critical-mass estimates in fall 1941 ranged from 2 to 100 kilograms, with an explosive yield of 600 tons of TNT
  • Definition of Weapons-Usable Uranium-233
    All three fissile materials were investigated as components in nuclear weapons Currently, U S nuclear weapons contain WGP or HEU or both Uranium-233 was not chosen as a weapons material (Woods 1966; Smith 1963) for several reasons: (1) methods and facilities to make WGP and HEU were developed in the 1940s, 20 years before methods were
  • Critical mass - Knowledge and References | Taylor Francis
    Although nuclear weapon designs are classified, there is likely a strong correlation between the mass of nuclear material in a weapon and how fissile it is (critical mass) One clear indication of this is the fact that the highly fissile nuclides 239Pu and 233U have a SQ value of 8 kg, while the less fissile 235U has a SQ value of 25 kg when it
  • Verification Required - Princeton University Library
    Security Verification Required Please complete the verification below to continue to oar princeton edu
  • Critical mass and fizzles - MrReid. org
    In nuclear weapon design a critical mass is the minimum amount of nuclear material required to sustain the chain reaction necessary for a nuclear explosion There are a number of factors that affect the critical mass Material, enrichment and purity: Different nuclear materials have different
  • Uranium Enrichment - Nuclear Threat Initiative
    All HEU is weapons-usable, but the lower the enrichment level the greater the amount of material required to achieve a critical mass—the amount of material required to build a bomb States with nuclear weapons typically use so-called weapons-grade HEU, which is typically defined as 90% HEU or above, to minimize weapons’ size Smaller and
  • Initiating a Fission Chain Reaction: What is Critical Mass?
    What is critical mass? A very simple online definition reads: the minimum amount of fissile material needed to maintain a nuclear chain reaction Notice critical mass is required to maintain a fission chain reaction In fact, at least for the production of an atomic weapons, supercritical mass, that is an amount of mass over critical mass, must





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