"Within about 1ms after the explosion, some 70-80% of the explosion energy... is emitted as primary thermal radiation, most of which consists of soft X-rays."

Diagram of a Chain Reaction

|
|
|
|
[1]------------------------------> o
. o o .
. o_0_o . <-----------------------[2]
. o 0 o .
. o o .
|
\|/
~
. o o. .o o .
[3]-----------------------> . o_0_o"o_0_o .
. o 0 o~o 0 o .
. o o.".o o .
|
/ | \
|/_ | _\|
~~ | ~~
|
o o | o o
[4]-----------------> o_0_o | o_0_o <---------------[5]
o~0~o | o~0~o
o o ) | ( o o
/ o \
/ [1] \
/ \
/ \
/ \
o [1] [1] o
. o o . . o o . . o o .
. o_0_o . . o_0_o . . o_0_o .
. o 0 o . <-[2]-> . o 0 o . <-[2]-> . o 0 o .
. o o . . o o . . o o .
/ | \
|/_ \|/ _\|
~~ ~ ~~
. o o. .o o . . o o. .o o . . o o. .o o .
. o_0_o"o_0_o . . o_0_o"o_0_o . . o_0_o"o_0_o .
. o 0 o~o 0 o . <--[3]--> . o 0 o~o 0 o . <--[3]--> . o 0 o~o 0 o .
. o o.".o o . . o o.".o o . . o o.".o o .
. | . . | . . | .
/ | \ / | \ / | \
: | : : | : : | :
: | : : | : : | :
\:/ | \:/ \:/ | \:/ \:/ | \:/
~ | ~ ~ | ~ ~ | ~
[4] o o | o o [5] [4] o o | o o [5] [4] o o | o o [5]
o_0_o | o_0_o o_0_o | o_0_o o_0_o | o_0_o
o~0~o | o~0~o o~0~o | o~0~o o~0~o | o~0~o
o o ) | ( o o o o ) | ( o o o o ) | ( o o
/ | \ / | \ / | \
/ | \ / | \ / | \
/ | \ / | \ / | \
/ | \ / | \ / | \
/ o \ / o \ / o \
/ [1] \ / [1] \ / [1] \
o o o o o o
[1] [1] [1] [1] [1] [1]

Diagram Outline

1
- Incoming Neutron
2
- Uranium-235
3
- Uranium-236
4
- Barium Atom
5
- Krypton Atom

More
The history of the atomic bomb

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