An Etymological Dictionary of Astronomy and Astrophysics

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فرهنگ ریشه‌شناختی اخترشناسی-اخترفیزیک

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collisional decay
  تباهی ِ همکوبشی  
tabâhi-ye hamkuneši
Fr.: désexcitation collisionnelle  

The process when the energy difference between the excited and non excited states of an atom is taken away by an electron during a collision.

See also: → collisional; → decay.