Meaning of "forbidden transition" in the English dictionary

PRONUNCIATION OF FORBIDDEN TRANSITION

forbidden transition

GRAMMATICAL CATEGORY OF FORBIDDEN TRANSITION

Forbidden transition 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 FORBIDDEN TRANSITION MEAN IN ENGLISH?

Forbidden mechanism

In physics, a forbidden mechanism or forbidden line is a spectral line emitted by atoms undergoing nominally "forbidden" energy transitions not normally allowed by the selection rules of quantum mechanics. In formal physics, this means that the process cannot proceed via the most efficient route. Although the transitions are nominally "forbidden", there is a small probability of their spontaneous occurrence, should an atom or molecule be raised to an excited state. More precisely, there is a certain probability that such an excited atom will make a forbidden transition to a lower energy state per unit time; by definition this probability is much lower than that for any transition permitted by the selection rules. Therefore, if a state can de-excite via a permitted transition it will almost certainly do so rather than choosing the forbidden route. Nevertheless, "forbidden" transitions are only relatively unlikely: states that can only decay in this way usually have lifetimes of order milliseconds to seconds, compared to less than a microsecond for decay via permitted transitions.

Definition of forbidden transition in the English dictionary

The definition of forbidden transition in the dictionary is an electronic transition in an atom, molecule, etc, that is not permitted by electric dipole selection rules.

TRANSLATION OF FORBIDDEN TRANSITION

Find out the translation of forbidden transition to 25 languages with our English multilingual translator.

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

• Translator English - Chinese: 禁戒跃迁
• Translator English - Spanish: transición prohibida
• English: forbidden transition
• Translator English - Hindi: मना संक्रमण
• Translator English - Arabic: الانتقال ممنوع
• Translator English - Russian: запрещается переход
• Translator English - Portuguese: transição proibida
• Translator English - Bengali: নিষিদ্ধ স্থানান্তর
• Translator English - French: transition interdite
• Translator English - Malay: Peralihan yang dilarang
• Translator English - German: verbotenen Übergang
• Translator English - Japanese: 禁制遷移
• Translator English - Korean: 금지 전환
• Translator English - Javanese: Transisi ingkang boten pareng
• Translator English - Vietnamese: chuyển cấm
• Translator English - Tamil: தடை செய்யப்பட்ட மாற்றம்
• Translator English - Marathi: निषिद्ध संक्रमण
• Translator English - Turkish: Yasak geçiş
• Translator English - Italian: transizione proibita
• Translator English - Polish: przejście zabronione
• Translator English - Ukrainian: забороняється перехід
• Translator English - Romanian: tranziție interzis
• Translator English - Greek: απαγορεύεται η μετάβαση
• Translator English - Afrikaans: verbode oorgang
• Translator English - Swedish: förbjuden övergång
• Translator English - Norwegian: forbudt overgang

10 ENGLISH BOOKS RELATING TO «FORBIDDEN TRANSITION»

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

Optical Spectra and Chemical Bonding in Transition Metal ...

Figure 3 shows calculated spectra similar to the fit in Fig. 2a, but for coupling strengths γ varying from 0 cm-1 to 900 cm-1. It is obvious that the forbidden transition, denoted by the circle in Fig. 3a, gains intensity through coupling with the broad, ...

Thomas Schönherr, Christian Klixbüll Jørgensen, 2004

Principles of Lasers

6.22 for the three cases: (1) optically allowed transition, (2) optically forbidden transition involving no change of multiplicity, (3) optically forbidden transition involving a change of multiplicity. In all three cases, the peak value of has been ...

Orazio Svelto, 2010

Chemical Bonds: An Introduction to Atomic and Molecular ...

... an example of such a transition. The e value of the 7r* -» n* band in C2H4 is approximately 104. An important example of a forbidden transition is the excitation of a nonbonding 2p oxygen electron in molecules containing the carbonyl group ...

Harry B. Gray

Spectroscopy

The forbidden transition is a result of the excitation of one electron from the lone pair present on the heteroatom to an antibonding n orbital. For example, the n — > 7t* transition near 300 nm in case of carbonyl compounds with E^ value ...

Dr. B. K. Sharma, 1981

Instrumental Methods of Chemical Analysis

The forbidden transition is a result of the excitation of one electron from the lone pair present on the heteroatom to an antibonding tc* orbital. For example, the n -» 71* transition near 300 nm in case of carbonyl compounds with value between ...

Dr. B. K. Sharma, 2000

Catalog of National Bureau of Standards publications, 1966-1976

Forbidden; Transition probability; Allowed; Atomic; Discrete; SP320. Suppt. 1. SP305-3. Forbidden; Transition probability; Allowed; Atomic; Discrete; M278 Supplement. SP305-1. Forbidden bandgap; Phonpns; Copper oxide; Cuprous oxide; ...

United States. National Bureau of Standards. Technical Information and Publications Division, Betty L. Burris, Rebecca J. Morehouse, 1978

Optical Materials and Applications

... 25–27 direct forbidden transition, 27–28 direct interband transitions direct allowed transition, 25–27 direct forbidden transition, 27–28 fundamentals, 24–25 direct transition, 40–42 dispersion free carrier dispersion, 19 fundamentals, 81 oxide ...

Moriaki Wakaki, 2012

Nuclear Physics: Principles and Applications

In a forbidden transition, we cannot assume that the matrix element M is independent of momentum, as we could for an allowed transition. A consequence of this is that there is an effect on the shape of the B-particle energy spectrum when L is ...

John Lilley, 2013

Techniques and Methods in Biology

Forbidden transition: n —> it * transition is an example. In this transition, a carbonyl n electron of say, a saturated ketone is to be promoted to an orthogonal (perpendicular) 7T * orbital (n 1 7T *). There would be no orbital overlap for such 90° ...

Ghatak K. L.

The Triplet State

In an atom a symmetry-forbidden transition can occur only as an electric quadrupole or a magnetic dipole transition, and this means that the transition probability is at most 10~6 times the probability of an allowed transition. In a molecule a ...

A. B. Zahlan, 1967

3 NEWS ITEMS WHICH INCLUDE THE TERM «FORBIDDEN TRANSITION»

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

Cold-atom random laser simulates stellar clouds

This was done by adjusting the wavelength of the tunable laser such that the emitted light corresponded to that of a forbidden transition in the ... «physicsworld.com, May 13»

Experiment tests underpinnings of quantum field theory, Bose …

... the otherwise bose-statistics forbidden transition. The most common isotopes of barium, barium-138 and barium-136, have zero nuclear spin, ... «UC Berkeley, Jun 10»

Good fortune from a broken mirror

Because boson exchange mixes the state with the ( ) state, there is a tiny transition amplitude for this otherwise forbidden transition. «Physics, Aug 09»