- Townsend ionization
- Town·send ionization (tounґzənd) [John Townsend, Irish physicist, 1868–1957] see avalanche ionization, under ionization.
Medical dictionary. 2011.
Townsend ionization
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Townsend ionization — avalanche i … Medical dictionary
Townsend discharge — The Townsend discharge is a gas ionization process where an initially very small amount of free electrons, accelerated by a sufficiently strong electric field, give rise to electrical conduction through a gas by avalanche multiplication: when the … Wikipedia
Townsend coefficient — The first Townsend coefficient ( α ), also known as first Townsend avalanche coefficient is a term used in an ionization process where there is a possibility of secondary ionization because the primary ionization electrons gain sufficient energy… … Wikipedia
Ionization chamber — An ionization chamber is a device used for two major purposes: detecting particles in air (as in a smoke detector), and for detection or measurement of ionizing radiation. An ionization chamber is an instrument constructed to measure the number… … Wikipedia
Townsend , Sir John Sealy Edward — (1868–1957) Irish physicist Townsend, the son of a professor of civil engineering from Galway (now in the Republic of Ireland), was educated at Trinity College, Dublin. In 1895 he took advantage of a change in the Cambridge examination statutes… … Scientists
Ramsauer-Townsend effect — The Ramsauer Townsend effect is a physical phenomenon involving the scattering of low energy electrons by atoms of a noble gas. Since its explanation requires the wave theory of quantum mechanics, it demonstrates the need for physical theories… … Wikipedia
John Sealy Townsend — Infobox Scientist box width = 300px name = John Townsend image size = 300px caption = John Sealy Edward Townsend (1868 1957) birth date = birth date|1868|6|7|mf=y birth place = Galway, County Galway, Ireland death date = death date|1957|2|16|mf=y … Wikipedia
avalanche ionization — the multiplicative process in which a single charged particle, accelerated by a strong electric field, produces additional charged particles through collision with neutral gas molecules; called also Townsend i … Medical dictionary
лавинная ионизация — — [А.С.Гольдберг. Англо русский энергетический словарь. 2006 г.] Тематики энергетика в целом EN cumulative ionizationtownsend ionization … Справочник технического переводчика
radiation measurement — ▪ technology Introduction technique for detecting the intensity and characteristics of ionizing radiation, such as alpha, beta, and gamma rays or neutrons, for the purpose of measurement. The term ionizing radiation refers to those… … Universalium
