B and Barn

B noun - (physics) a unit of nuclear cross section; the effective circular area that one particle presents to another as a target for an encounter.

Barn is a synonym for b. In some cases you can use "Barn" instead a noun "B".

Barn noun - (physics) a unit of nuclear cross section; the effective circular area that one particle presents to another as a target for an encounter.

B is a synonym for barn. You can use "B" instead a noun "Barn".