transmission

in mass spectrometry
https://doi.org/10.1351/goldbook.T06478
The ratio of the number of ions leaving a region of a @[email protected] to the number entering that region.
Source:
PAC, 1991, 63, 1541. (Recommendations for nomenclature and symbolism for mass spectroscopy (including an appendix of terms used in vacuum technology). (Recommendations 1991)) on page 1546 [Terms] [Paper]