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Nuclear weapons:' _5 b0 R; o o f
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Weapons of Mass Destruction. (2003). In Harvey Kushner (Ed.), Encyclopedia of Terrorism, Vol. 1. (404-406). Thousand Oaks: Sage Reference. Retrieved October 22, 2008, from Gale Virtual Reference Library via Gale:
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Nuclear Weapons. (2006). Encyclopedia of Modern Europe: Europe Since 1914: Encyclopedia of the Age of War and Reconstruction, Vol. 4. (1891-1898). Retrieved October 22, 2008, from Gale Virtual Reference Library via Gale: 3 Q# l h3 T" d3 K* _. X
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Clark, Roger. (2005). Nuclear Weapons. In Dinah Shelton (Ed.), Encyclopedia of Genocide and Crimes Against Humanity, Vol. 2. (754-761). Detroit: Macmillan Reference USA. Retrieved October 22, 2008, from Gale Virtual Reference Library via Gale:
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! ]' m0 ]+ v( S& d7 C/ xLerner, K. Lee, Gilman, Larry, & Haycock, Dean Allen. (2004). Nuclear Weapons. In K. Lee Lerner & Brenda Lerner (Eds.), Gale Encyclopedia of Science, Vol. 4. (3rd ed., 2816-2821). Detroit: Gale. Retrieved October 22, 2008, from Gale Virtual Reference Library via Gale:
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$ K. |- n" Y( ?critical mass
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3 l& s! o/ E) p- X* f! q1. The smallest mass of a fissionable material that will sustain a nuclear chain reaction at a constant level.0 K% `& J; T# j5 k
2. The amount of matter needed to generate sufficient gravitational force to halt the current expansion of the universe7 f6 T& o+ E8 o) F3 K& z
<http://www.thefreedictionary.com/critical+mass>4 y) O7 K6 W+ ~" x. X
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6 h* A: r. v# m8 t; E* l[ 本帖最后由 墨涟 于 2008-10-24 15:04 编辑 ] |
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