normal X-ray level

https://doi.org/10.1351/goldbook.N04217
Synonymous with @D01663@.
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 738 [Terms] [Paper]