observed interface width

synonym: depth resolution

https://doi.org/10.1351/goldbook.09443

In secondary-ion mass spectrometry, Auger electron spectroscopy, and X-ray photoelectron spectroscopy, distance over which a change in signal intensity from \(\pu{16\%}\) to \(\pu{84\%}\), or from \(\pu{84\%}\) to \(\pu{16\%}\), is measured at the junction of two dissimilar matrices, the thicknesses of which are more than six times that distance

Note: The change in signal intensity should be quoted with the observed interface width.

See also: depth resolution parameter

Source:
PAC, 2020, 92, 1781. 'Glossary of methods and terms used in surface chemical analysis (IUPAC Recommendations 2020)' on page 1808 (https://doi.org/10.1515/pac-2019-0404)