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Deuterium
Stable isotope of hydrogen with mass (nucleon) number of 2. The nucleus contains one proton and one neutron. Deuterium is widely used in fusion reactors and for fusion-based interplanetary ships. Though more difficult to fuse, it is much more stable and widely available than tritium.
 
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Development Notes
Text by M. Alan Kazlev
Initially published on 09 October 2001.

 
 
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