Meaning of "delayed neutron" in the English dictionary

PRONUNCIATION OF DELAYED NEUTRON

delayed neutron

GRAMMATICAL CATEGORY OF DELAYED NEUTRON

Delayed neutron is a noun.

A noun is a type of word the meaning of which determines reality. Nouns provide the names for all things: people, objects, sensations, feelings, etc.

WHAT DOES DELAYED NEUTRON MEAN IN ENGLISH?

Delayed neutron

In nuclear engineering, a delayed neutron is a neutron emitted after a nuclear fission event, by one of the fission products, any time from a few milliseconds to a few minutes after the fission event. Neutrons born within seconds of the fission are termed "prompt neutrons". In a nuclear reactor large nuclides fission in two neutron-rich fission products. Many of these fission products then undergo radioactive decay and the resulting nuclides are left in an excited state. These usually immediately undergo gamma decay but a small fraction of them are excited enough to be able to decay by emitting a neutron in addition. The moment of beta decay of the precursor nuclides - which are the precursors of the delayed neutrons - happens orders of magnitude later compared to the emission of the prompt neutrons. Hence the neutron that originates from the precursor's decay is termed a delayed neutron. However, the "delay" in the neutron emission is due to the delay in beta decay, since neutron emission, like gamma emission, happens almost immediately after the beta decay.

Definition of delayed neutron in the English dictionary

The definition of delayed neutron in the dictionary is a neutron produced in a nuclear reactor by the breakdown of a fission product and released a short time after neutrons produced in the primary process.

TRANSLATION OF DELAYED NEUTRON

Find out the translation of delayed neutron to 25 languages with our English multilingual translator.

The translations of delayed neutron from English to other languages presented in this section have been obtained through automatic statistical translation; where the essential translation unit is the word «delayed neutron» in English.

• Translator English - Chinese: 缓发中子
• Translator English - Spanish: retardada de neutrones
• English: delayed neutron
• Translator English - Hindi: देरी न्यूट्रॉन
• Translator English - Arabic: تأخر النيوترون
• Translator English - Russian: запаздывающих нейтронов
• Translator English - Portuguese: nêutrons atraso
• Translator English - Bengali: বিলম্বিত নিউট্রন
• Translator English - French: neutrons retardés
• Translator English - Malay: Neutron ditangguhkan
• Translator English - German: verzögerter Neutronen
• Translator English - Japanese: 遅延中性子
• Translator English - Korean: 지연 중성자
• Translator English - Javanese: Nyuda neutron
• Translator English - Vietnamese: chậm neutron
• Translator English - Tamil: தாமதமாக நியூட்ரான்
• Translator English - Marathi: विलंबित न्युट्रॉन
• Translator English - Turkish: Gecikmeli nötron
• Translator English - Italian: neutrone ritardato
• Translator English - Polish: opóźnione neutronów
• Translator English - Ukrainian: запізнілих нейтронів
• Translator English - Romanian: neutron întârziată
• Translator English - Greek: καθυστερημένη νετρονίων
• Translator English - Afrikaans: vertraag neutron
• Translator English - Swedish: fördröjd neutron
• Translator English - Norwegian: forsinkede nøytroner

10 ENGLISH BOOKS RELATING TO «DELAYED NEUTRON»

Discover the use of delayed neutron in the following bibliographical selection. Books relating to delayed neutron and brief extracts from same to provide context of its use in English literature.

Delayed Neutron Group Parameters from Photofission

This dissertation presents a theoretical basis and the experimental procedure for the determination of delayed neutron group parameters resulting from photofission for three fissionable materials (238U, 232Th, and 239Pu).

Mathew Thomas Kinlaw, 2007

Nuclear Principles in Engineering

Delayed neutron precursors Not all neutrons are released at the same time following a fission event. Nearly 99% of all neutrons are released virtually instantaneously (within about 10–13 s) after the actual fission event. These neutrons are ...

Tatjana Jevremovic, 2009

Improved Neutron Kinetics for Coupled Three-dimensional ...

0.940 0.945 0.950 0.955 0.960 0.965 0.970 0.975 0.980 0.985 0 1 2 3 4 5 6 7 Burnup (GWd/t) Delayed Neutron Group 1 Delayed Neutron Group 2 Delayed Neutron Group 3 Delayed Neutron Group 4 Delayed Neutron Group 5 Delayed ...

Bedirhan Akdeniz, 2007

Nuclear Reactor Physics

Moreover, for a transient below prompt critical, the largest part of the neutron source is due to the decay of delayed neutron precursors, which tends to hold back a flux tilt until the delayed neutron precursor distribution also tilts. The point  ...

Weston M. Stacey, 2007

Activation Analysis

Echo, M. W. and Turk, E. H., Quantitative determination of U-235 by delayed neutron counting, U.S. AEC Report PTR-143, January 28, 1957; and report TID 7531 (Pt 1) p. 153, A conference: Modern Approaches to Isotopic Analysis of Uranium, ...

Zeev Alfassi, 1990

Nuclear Systems: Elements Of Thermal Design

where N(t) = neutron density Cj(t) = effective precursor concentration for group i p = reactivity /* = mean neutron generation time /3 = total effective delayed neutron fraction (j8 = Sf=,j8,) j8, = effective delayed neutron fraction of group i A, ...

Neil E. Todreas, 1992

Nuclear Reactor Kinetics and Plant Control

1.3 Prompt Neutron and Delayed Neutron Most neutrons (99.35 % for 235U fission by thermal neutrons) are emitted immediately by a nuclear fission event. These are called “prompt neutrons.” A few neutrons are emitted a little after nuclear ...

Yoshiaki Oka, Katsuo Suzuki, 2013

Neutron Fluctuations: A Treatise on the Physics of Branching ...

Here, however, we shall instead use the traditional derivation with the forward and backward equations. In order to calculate the moments, a master equation will be considered for the joint distribution of neutrons, one group of delayed neutron ...

Imre Pazsit, Lenard Pal, 2007

Fast Spectrum Reactors

The delayed neutron fraction, β, can be estimated from a zero-dimensional neutronics calculation by weighting the delayed neutron fraction of each fissionable isotope with the number of neutrons produced from fissions by that isotope, ...

Alan E. Waltar, Donald R. Todd, Pavel V. Tsvetkov, 2011

Reactor Dosimetry: Methods, Applications, and Standardization

The relation between the number of counts in a delayed neutron counter and the neutron flux, *, based on the empirical Keepin [11] six- group representation of the delayed neutron data is given by where e = efficiency of the detector, P = mass ...

Harry Farrar, E. P. Lippincott, 1989

3 NEWS ITEMS WHICH INCLUDE THE TERM «DELAYED NEUTRON»

Find out what the national and international press are talking about and how the term delayed neutron is used in the context of the following news items.

Public Release: 18-Feb-2015 Getting a grip on exotic atomic nuclei

Delayed neutron emission is also of importance here on Earth: it makes it relatively easy to monitor the progression of nuclear reactions in ... «EurekAlert, Feb 15»

Where Does the Energy Come From in LENR?

... beta-delayed neutron emissions and beta-delayed alpha decays among others. Different values of energy release are associated with each ... «New Energy Times, Jan 12»

Recreating a Stellar Electron Catch

GT- distributions do not directly constrain electron capture rates, but they are relevant for the determination of half-lives, beta-delayed neutron ... «Physical Review Focus, Nov 11»