## interfacial layer width, $$\sigma_{\text{S}}$$

in thin films
https://doi.org/10.1351/goldbook.I03086
The @C00977@ defined by the variance of the Gaussian function fitted to the @G02669@ of the @E01986@ profile established by X-ray specular @R05235@ studies of the liquid @I03082@.
Source:
PAC, 1994, 66, 1667. (Thin films including layers: terminology in relation to their preparation and characterization (IUPAC Recommendations 1994)) on page 1674 [Terms] [Paper]