Here is a few facts on it:
Dosage in RADS; Clinical effect; Mortality rate
0-25 Practically no effect. 0%
100 Slight nausea. 0%
200. Nausea vomiting, 25%
Hair loss, fatiuge,
Hemmorrages
400. Increased severity of 50%
above symptoms
600 Rapid on set of 75%


For a 20 KT bomb at .10 miles from blast zone metals vaporize. .5 miles metals melt. 1 mile out rubber and plastics melt and wood burns. 2 miles third degree burns. At three miles wooden buildings vaporize.

The energy distrubution is:
50% blast
35% heat
10% residual radiation (remains in matter)
5% initial radiation

Gamma radiation is released in the initial blast. It can pass through soil, water, brick, and concrete and disrupt molucular structure of living tissue.

A 1 MT bomb detonated at 6000 ft only has 1/5 of normal blast. If detonated at 3000 ft it has optimum tactical blast effect.