<P> The latter contribution is dominant in the absence of a pure l = 0 contribution, but cannot be calculated without knowing the exact spatial form of the nucleons wavefunction inside the deuterium . </P> <P> Higher magnetic and electric multipole moments cannot be calculated by the above model, for similar reasons . </P> <P> Deuterium has a number of commercial and scientific uses . These include: </P> <P> Deuterium is used in heavy water moderated fission reactors, usually as liquid D O, to slow neutrons without the high neutron absorption of ordinary hydrogen . This is a common commercial use for larger amounts of deuterium . </P>

Mass percentage of deuterium in heavy water is