The Ground Zero here is in the original
sense of word, a nuclear blast site. The thermal energy may absorb heat
at a rate of 10 E 23 ergs / cm2 sec and near the bomb all surfaces may
heat to 4000 °C or 7200 °F igniting or vapourizing violently. Source:
US Department of Defense & US Department of Energy, Glasstone - Dolan:
'The Effects of Nuclear Weapons' (1980).
- The thermonuclear bomb used was a 'pure'
hydrogen bomb, so no uranium or plutonium at all. The basic nuclear reaction
is Deuterium + Tritium Alpha + n. The ignition of this is the fine part,
either with a powerful beam array or antimatter (a very certain way to
get the necessary effect of directed energy in order not to level the adjacent
blocks of high-rise buildings, as well).