Cross sections are a measure for the probability of a nuclear reaction in dependence of the energy of an incoming projectile. When Fermi and his collaborators started measuring cross sections their values surpassed the theoretical prediction by far. They said, they were as wide as a barn door. That was the hour of birth of the new physical unit barn.

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Cross Sections

  • Wolfgang Osterhage

摘要

Cross sections are a measure for the probability of a nuclear reaction in dependence of the energy of an incoming projectile. When Fermi and his collaborators started measuring cross sections their values surpassed the theoretical prediction by far. They said, they were as wide as a barn door. That was the hour of birth of the new physical unit barn.