The radiative decay of an excitation level may proceed to the neutral
ground state and would thus occur at the same energy as the corresponding line in the
absorption spectrum. Such a line is called a
resonance line and the process is called resonance emission.
Source:
PAC, 1991, 63, 735
(Nomenclature, symbols, units and their usage in spectrochemical analysis - VIII.
Nomenclature system for X-ray spectroscopy (Recommendations 1991))
on page 739
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).
XML on-line corrected version: http://goldbook.iupac.org (2006-) created by M. Nic,
J. Jirat, B. Kosata; updates compiled by A. Jenkins. ISBN 0-9678550-9-8.
https://doi.org/10.1351/goldbook.
