linear Napierian absorption coefficient

symbol: $\alpha$
synonyms: absorption coefficient, Napierian absorption coefficient
https://doi.org/10.1351/goldbook.08265
Napierian absorbance (\(A_{\rm{e}}\)) divided by path-length (\(l\)). \(\alpha = A_{\rm{e}}/l\).
Note:
\(\alpha\) is the reciprocal of the optical absorption depth.
See also: molar Napierian absorption coefficient, molar decadic absorption coefficient
Source:
PAC, 2021, 93, 647. (Glossary of methods and terms used in analytical spectroscopy (IUPAC Recommendations 2019)) on page 665 [Terms] [Paper]
Citation: 'linear Napierian absorption coefficient' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. https://doi.org/10.1351/goldbook.08265 RIS BibTex EndNote
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