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IEVref:395-01-26ID:
Language:enStatus: Standard
Term: absorption coefficient
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Symbol: μabs
Definition: for a parallel beam of specified radiation in a given substance, the quantity μabs describes the fraction of energy absorbed in passing through a thin layer of thickness Δx

Note 1 to entry: The absorption coefficient is primarily energy dependent.

Note 2 to entry: According to whether the thickness Δx is expressed in terms of length, mass per unit area, moles per unit area or atoms per unit area, it is called the linear, mass, molar or atomic absorption coefficient.

Note 3 to entry: This entry was numbered 393-14-46 in IEC 60050-393:2003.


Publication date:2014-03
Source:ISO 921:1997, definition 6, modified
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