penetration depth 

https://doi.org/10.1351/goldbook.P04474
Citation: 'penetration depth' 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.P04474 RIS BibTex EndNote
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