interfacial layer width, \(\sigma_{\text{S}}\)

in thin films
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@.
PAC, 1994, 66, 1667. (Thin films including layers: terminology in relation to their preparation and characterization (IUPAC Recommendations 1994)) on page 1674 [Terms] [Paper]