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heavy water
(redirected from Heavy-water)

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heavy water

Water containing the isotope deuterium instead of hydrogen (relative molecular mass 20 as opposed to 18 for ordinary water).

Its chemical properties are identical with those of ordinary water, but its physical properties differ slightly. It occurs in ordinary water in the ratio of about one part by mass of deuterium to 5,000 parts by mass of hydrogen, and can be concentrated by electrolysis, the ordinary water being more readily decomposed by this means than the heavy water. It has been used in the nuclear industry because it can slow down fast neutrons, thereby controlling the chain reaction.



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? Mentioned in ? References in periodicals archive
 
Canada suspended cooperation on a reactor and heavy-water plant; France sent a congratulatory telegram (and then withdrew it).
INDIA'S NUCLEAR BOMB: The Impact on Global Proliferation by Anderson, Robert (American businessperson and engineer) / Pacific Affairs
The controversy began March 23, 1989, when the two chemists claimed to have devised electrochemical cells, used to break heavy-water molecules into atoms, that produced so much heat energy that only nuclear reactions--such as the fusion of the water's deuterium atoms inside a cell's palladium electrode -- could be responsible (SN: 4/1/89).
Cold fusion: wanted dead or alive by Amato, I. / Science News
Slamming salvos of minuscule heavy-water cannonballs into a thumbnail-sized target containing heavy hydrogen produces micro-thermonuclear reactions in which some of the colliding atoms fuse, report scientists at the Brookhaven National Laboratory in Upton, N.
Colliding clusters hint at new fusion route by Amato, I. / Science News
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