"Then let's go back to the fission bomb again for a moment.

Our signal to begin would be the flash of the fission bomb.

Theoretically, it should be possible to use Np-237 as fission bomb material.

With only fission bombs, nuclear war was something that possibly could be limited.

"Jack, the fission bomb was it in the mass murder department.

"We're using uranium research and the possibility of a fission bomb as a cover story.

They're telling us we better not be first to escalate past tactical fission bombs.

I wish we had a suitcase fission bomb, Arvid thought.

Because this lets them develop the fission bomb first.

They tentatively confirmed that a fission bomb was theoretically possible.

The fusion idea was put aside to concentrate on producing fission bombs.

It was a thousand feet underground, proof against tactical fission bombs.

The requirement of a fission bomb makes the method impractical for power generation.

Mooney was as close as 7 miles from fission bomb tests.

Depleted uranium is used as a tamper in fission bombs.

Most of the energy released by a fission bomb is in the form of x-rays.

Fast fission of uranium-238 does also occur in fission bombs.

"A small fission bomb is the power source.

High-explosive weapons just weren't effective enough when the enemy was firing at you with fission bombs.

They are lined with a special concrete that Hellstrom says is proof against a fission bomb.

Under what circumstances could he have dropped a nuclear fission bomb on Hiroshima?'

The German Empire was the first state suspected of having a program to develop fission bombs.

The mass was less than earlier estimates and suggested that development of a fission bomb was practical.

Hydrogen bombs can be many hundreds of times more powerful than fission bombs.

Tritium is used in both fission bombs and fusion bombs.