The difference between the energy of the exciting photon and the @I03199@.
Source: PAC, 1976, 45, 221. (Nomenclature and Spectral Presentation in Electron Spectroscopy Resulting from Excitation by Photons) on page 223 [Terms] [Paper]
Cite as: IUPAC. Compendium of Chemical Terminology, 2nd ed. (the "Gold Book"). Compiled by A. D. McNaught and A. Wilkinson. Blackwell Scientific Publications, Oxford (1997). Online version (2019-) created by S. J. Chalk. ISBN 0-9678550-9-8. https://doi.org/10.1351/goldbook.