coincidence counting

coincidence counting

      in physics, the almost simultaneous detection of two nuclear or subatomic particles (e.g., within a time of 10−5 second). Coincidence counting involves two or more particle counters exposed to the same source of particles and connected to an electronic coincidence circuit. One use of the coincidence technique is to detect particles emitted simultaneously from the same nucleus—e.g., a beta particle and a gamma ray photon. The technique is also important in the study of cosmic rays and in experiments with subatomic particles.

      In anticoincidence counting, two counters are connected so that a pulse is recorded by one of them only if there is no simultaneous pulse in the other. This is useful in rejecting particles that do not originate from the source being studied.

* * *


Universalium. 2010.

Игры ⚽ Нужно сделать НИР?

Look at other dictionaries:

  • coincidence counting — sutapčių skaičiavimas statusas T sritis fizika atitikmenys: angl. coincidence counting vok. Koinzidenzzählung, f rus. счёт совпадений, m pranc. calcul des coïncidences, m …   Fizikos terminų žodynas

  • Coincidence counting (physics) — In quantum physics, coincidence counting is used in experiments testing particle non locality and quantum entanglement. In these experiments two or more particles are created from the same initial packet of energy, inexorably linking/entangling… …   Wikipedia

  • Index of coincidence — In cryptography, coincidence counting is the technique (invented by William F. Friedman[1]) of putting two texts side by side and counting the number of times that identical letters appear in the same position in both texts. This count, either as …   Wikipedia

  • Coinidence counting — In quantum physics, coincidence counting is used in experiments testing particle non locality and quantum entanglement. In these experiments two particles are created from the same initial energy, inexorably linking/entangling their physical… …   Wikipedia

  • Liquid scintillation counting — is a standard laboratory method in the life sciences for measuring radiation from beta emitting nuclides. Scintillating materials are also used in differently constructed counters in many other fields. Samples are dissolved or suspended in a… …   Wikipedia

  • Kasiski examination — In cryptanalysis, Kasiski examination (also referred to as Kasiski s Test or Kasiski s Method) is a method of attacking polyalphabetic substitution ciphers, such as the Vigenère cipher. It was independently developed by Charles Babbage and later… …   Wikipedia

  • Фридман, Уильям Фредерик — Уильям Фредерик Фридман William Frederick Friedman …   Википедия

  • Уильям Фредерик Фридман — (рожд. Вольф Фридман, англ. William Frederick Friedman; 24 сентября 1891, Кишинёв Бессарабской губернии 12 ноября 1969, Вашингтон, США) американский криптолог и криптоаналитик, обыкновенно именуемый «отцом американской криптологии» (The Father or …   Википедия

  • Уильям Фридман — Уильям Фредерик Фридман (рожд. Вольф Фридман, англ. William Frederick Friedman; 24 сентября 1891, Кишинёв Бессарабской губернии 12 ноября 1969, Вашингтон, США) американский криптолог и криптоаналитик, обыкновенно именуемый «отцом американской… …   Википедия

  • Фридман, Уильям — Уильям Фредерик Фридман (рожд. Вольф Фридман, англ. William Frederick Friedman; 24 сентября 1891, Кишинёв Бессарабской губернии 12 ноября 1969, Вашингтон, США) американский криптолог и криптоаналитик, обыкновенно именуемый «отцом американской… …   Википедия

Share the article and excerpts

Direct link
… Do a right-click on the link above
and select “Copy Link”