A weapon deriving a large portion of its energy from
the nuclear fusion of hydrogen isotopes.
lighter elements are joined together to form heavier
elements, and the end product weighs less than the
components forming it. The difference in mass is converted
into energy. Because extremely high temperatures are
required to initiate fusion reactions, a hydrogen
bomb is also known as a thermonuclear bomb.
structure of a hydrogen bomb is as follows an Atomic
Bomb is surrounded by a layer of lithium deuteride
(compound of lithium and deuterium) and then by a
tamper, or thick outer layer, frequently of fissionable
material, that holds the content together in order
to obtain a larger explosion.
The atomic explosion
produces neutrons that fission the lithium into helium,
tritium, and energy, and also produces the extremely
high temperature needed for the subsequent fusion
of deuterium with tritium and tritium with tritium.
The first thermonuclear bomb was exploded in 1952
at Enewetak by US the second in 1953 by the U.S.S.R.