| 词条 | Langmuir–Taylor detector |
| 释义 |
A Langmuir–Taylor detector, also called surface ionization detector or hot wire detector, is a kind of ionization detector used in mass spectrometry, developed by John Taylor[1] based on the work of Irving Langmuir and K. H. Kingdon.[2] ConstructionThis 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. ApplicationsThis detector is mostly used with alkali atoms, having a low ionization potential, with applications in mass spectrometry and atomic clocks. References1. ^{{cite journal|last=Taylor|first=John|title=The Reflection of Beams of the Alkali Metals from Crystals|journal=Physical Review|year=1930|volume=35|issue=4|pages=375–380|doi=10.1103/PhysRev.35.375|bibcode=1930PhRv...35..375T}} {{Mass spectrometry}}{{DEFAULTSORT:Langmuir-Taylor detector}}{{science-stub}}2. ^{{cite journal|last=Langmuir|first=Irving|authorlink=Irving Langmuir|title=Thermionic Effects Caused by Vapours of Alkali Metals|journal=Proceedings of the Royal Society A |year=1925|volume=107|issue=741|pages=61–79|doi=10.1098/rspa.1925.0005|bibcode=1925RSPSA.107...61L}} 1 : Mass spectrometry |
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