X-ray linewidth

https://doi.org/10.1351/goldbook.09303
Energy width of the principal characteristic X-ray line.
Notes:
  1. In X-ray photoelectron spectroscopy the X-ray linewidth usually refers to that of the X-ray source.
  2. X-ray linewidth contributes to the photoelectron peak widths.
Source:
PAC, 2020, 92, 1781. 'Glossary of methods and terms used in surface chemical analysis (IUPAC Recommendations 2020)' on page 1819 (https://doi.org/10.1515/pac-2019-0404)