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activation cross section
A measure of the probability of the occurrence of a nuclear reaction. The cross section is the apparent surface which a target nucleus exposes to an arriving particle. The cross section is indicated in surface units. Neutron cross sections are frequently measured in units called barns, symbol: b. 1 barn is equal to 10-28 m2.
Related category
• ATOMIC AND NUCLEAR PHYSICSSource: European Nuclear Society
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