IEVref: 395-01-23 ID: Language: en Status: Standard Term: cross-section, Synonym1: Synonym2: Synonym3: Symbol: σ Definition: measure of the probability of a nuclear reaction of a specific type, stated as the effective area which target particles present to incident particles for that process Note 1 to entry: The standard unit for measuring a nuclear cross-section is the barn, which is equal to 10−28 m2 or 10−24 cm2.Note 2 to entry: A microscopic cross-section can be measured for each process of nuclear reaction (capture, fission, n-n′, n-2n, n-g, …..). Note 3 to entry: The macroscopic cross-section allows the calculation of the number of interactions for a given nuclear reaction in a given material; this value is the produce between the corresponding cross-section and the volumic number of particles in this material; it is expressed in m−1 or cm−1. Note 4 to entry: This entry was numbered 393-14-37 in IEC 60050-393:2003. Publication date: 2014-03 Source: Replaces: Internal notes: 2016-06-13: Editorial errors corrected (en and fr). The following paragraph deleted from the English:

The French needs to be adapted! JGO 2020-03-31: Editorial maintenance action approved via C00053: replace "cross section" by "cross-section". JGO CO remarks: TC/SC remarks: VT remarks: Domain1: Domain2: Domain3: Domain4: Domain5: