An Etymological Dictionary of Astronomy and Astrophysics

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فرهنگ ریشه‌شناختی اخترشناسی-اخترفیزیک

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attenuation coefficient
  همگر ِ تنکش  
hamgar-e tonokeš
Fr.: coefficient d'bsorption  

The fraction of a beam of → X-rays or → gamma rays that is absorbed or scattered per unit thickness of the → absorber.

The linear attenuation coefficient, denoted by the symbol μ, appears in the equation I(x) = I0e-μx, where I(x) is the intensity at depth of x cm and I0 is the original intensity.

See also: → attenuation; → coefficient.