After German physicists split a uranium nucleus in 1938, a number of scientists concluded that a nuclear chain reaction was feasible and possible.

That is how energy is extracted by breaking up uranium nuclei in nuclear power reactors.

Hahn, in a letter to Meitner, called this new reaction a "bursting" of the uranium nucleus.

Typically, uranium nucleus is divided into two fragments with the release of 2-3 neutrons, for example:

Hahn calls this new phenomenon a 'bursting' of the uranium nucleus.

Since 1939 he was the chief of a research program investigating the fission of uranium nuclei.

The uranium nuclei had already stacked into the Collider to the running density.

The uranium nuclei were gliding right on through.

There were uranium nuclei in the cosmic rays.

A uranium nucleus is about as close as you can get to a nuclear force black hole.