Barn
Unit of area
A barn is a metric unit of area equal to 10⁻²⁸ m². Originally used in nuclear physics for expressing the cross sectional area of nuclei and nuclear reactions, today it is also used in all fields ... Wikipedia
1 b in: is equal to
equivalent: 100 fm2
Named after: the broad side of a barn
SI base units: 10−28 m2
Symbol: b
Unit system: particle physics