Differential of a
direct spectrum with respect to energy by an analogue electrode modulation method or by the numerical differentiation of that spectrum.
Notes: - Used in Auger electron spectroscopy and, rarely, in X-ray photoelectron spectroscopy.
- The modulation amplitude (for example in unit \(\pu{eV}\)) or the number of points and the type of differentiating function should be given.
Source:
PAC, 2020, 92, 1781. 'Glossary of methods and terms used in surface chemical analysis (IUPAC Recommendations 2020)' on page 1823 (https://doi.org/10.1515/pac-2019-0404)