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Each contained not only a conventional spherical atom bomb at its tip, but also a 13-pound rod of plutonium inside a 300-pound compartment filled with the hydrogen isotope lithium-6 deuteride.

Drozdov et al. observed this isotope effect and found that, compared with the lanthanum hydride samples, the critical temperature in lanthanum deuteride samples is lower by almost exactly the amount predicted by the theory.

The Iranian papers repeatedly mention a specific substance used for making neutron initiators: uranium deuteride.

Most every piece of the plane was accounted for except, most notably, a secondary stage cylinder of uranium and lithium deuteride – the nuclear fuel components of one of the bombs.

To another, he expanded on the theme with a sort of minatory thrill: “I think it really not too improbable that a ten cm cube of uranium deuteride . . . might very well blow itself to hell.”