Lithium deuteride was the fusion fuel of choice in early versions of the hydrogen bomb . When bombarded by neutrons , both 6Li and 7Li produce tritium — this reaction , which was not fully understood when hydrogen bombs were first tested , was responsible for the runaway yield of the Castle Bravo nuclear test . Tritium fuses with deuterium in a fusion reaction that is relatively easy to achieve . Although details remain secret , lithium-6 deuteride apparently still plays a role in modern nuclear weapons as a fusion material
Castle Bravo
Castle Bravo
Lithium