This detector usually consists of a heated thin filament or ribbon of a metal with a high work function (typically tungsten or rhenium). Neutral atoms or molecules that strike the filament can boil off as positive ions in a process known as surface ionization, and these may be either measured as a current or detected, individually, using an electron multiplier and particle counting electronics.
- Taylor, John (1930). "The Reflection of Beams of the Alkali Metals from Crystals". Physical Review. 35 (4): 375–380. doi:10.1103/PhysRev.35.375.
- Langmuir, Irving (1925). "Thermionic Effects Caused by Vapours of Alkali Metals". Proceedings of the Royal Society A. 107: 61–79. doi:10.1098/rspa.1925.0005.
|This science article is a stub. You can help Wikipedia by expanding it.|