plutonium-239

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Related to plutonium 239: Plutonium 240, Plutonium 238

plutonium-239

[plü′tō·nē·əm ¦tü‚thər·dē′nīn]
(nuclear physics)
A synthetic isotope chemically similar to uranium and neptunium; atomic number 94; made by bombardment of uranium-238 with slow neutrons in a nuclear reactor; used as nuclear reactor fuel and an ingredient for nuclear weapons.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
The two options of enriched uranium 235 and plutonium 239 bred from uranium 238 were pursued.
Other radioactive materials used to produce nuclear energy include uranium 238 and thorium 232, which can be converted into plutonium 239 and uranium 233, respectively, and these then serve as fissionable materials.
And it could be enriched to Plutonium 239, also a prime bomb material.
Simeon was two months short of his fifth birthday when he was injected on April 26, 1946, with 0.169 microcuries of plutonium 239, a dose of radiation nearly 24 times what the average person receives in 50 years.
Although all isotopes of plutonium are fissionable and in principle can be used to make nuclear weapons, the dominant isotope, plutonium 239, is most suitable.
At a meeting one day, she says, a group of women issued an unexpected challenge: "if you're so concerned about what Plutonium 239 might do to the child's arm bud you should go see what a suction machine does to his whole body."
Plutonium 238 is 300 times more radioactive than plutonium 239, the radioisotope used as the fuel for atomic bombs, points out Dr.