An Etymological Dictionary of Astronomy and Astrophysics

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فرهنگ ریشه‌شناختی اخترشناسی-اخترفیزیک

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Thomson cross section
  سکنج‌گاه ِ تامسون  
sekanjgâh-e Thomson
Fr.: section efficace de Thomson  

The → cross section involved the → Thomson scattering of electromagnetic waves by a free electron. It is defined by: σT = 8πre2/3, where re is the classical → electron radius. Its value is 0.665 245 x 10-28 m2.

See also: → Thomson; → cross; → section.