Vibronic transition

Vibronic transition

A vibronic transition denotes the simultaneous change of vibrational and electronic quantum number in a molecule. According to the separability of electronic and nuclear motion in the Born-Oppenheimer approximation, the vibrational transition and electronic transition may be described separately. The selection rule for electronic transitions is given by Koopmans' theorem, while that for vibrational transitions is described by the Franck-Condon principle.

Most processes leading to the absorption and emission of visible light, and therefore the colorful world around us, are due to vibronic transitions. This may be contrasted to pure electronic transitions which occur in atoms and lead to sharp monochromatic lines (e.g. in a sodium vapor lamp) or pure vibrational transitions which only absorb or emit infrared light.

See also

* Vibronic coupling

External links

* [http://www.iupac.org/goldbook/V06618.pdf Definition of "vibronic transition"] in the IUPAC Compendium of Chemical Terminology


Wikimedia Foundation. 2010.

Игры ⚽ Поможем решить контрольную работу

Look at other dictionaries:

  • vibronic transition — vibroninis šuolis statusas T sritis fizika atitikmenys: angl. vibronic transition vok. vibronischer Übergang, m rus. вибронный переход, m pranc. transition vibronique, f …   Fizikos terminų žodynas

  • Transition vibronique — Une transition vibronique désigne une modification simultanée des nombres quantiques électronique et vibrationnel d un composé chimique (une molécule par exemple). Dans l approximation de la séparation des mouvements électronique et nucléaire… …   Wikipédia en Français

  • transition vibronique — vibroninis šuolis statusas T sritis fizika atitikmenys: angl. vibronic transition vok. vibronischer Übergang, m rus. вибронный переход, m pranc. transition vibronique, f …   Fizikos terminų žodynas

  • Transition metal — The term transition metal (sometimes also called a transition element) has two possible meanings: The IUPAC definition[1] states that a transition metal is an element whose atom has an incomplete d sub shell, or which can give rise to cations… …   Wikipedia

  • Franck-Condon principle — The Franck Condon principle is a rule in spectroscopy and quantum chemistry that explains the intensity of vibronic transitions. Vibronic transitions are the simultaneous changes in electronic and vibrational energy levels of a molecule due to… …   Wikipedia

  • Principe Franck-Condon — Figure 1. Diagramme énergétique illustrant le principe Franck Condon. Les transitions électroniques étant très rapides comparées aux mouvements nucléaires, les niveaux vibrationnels sont favorisés lorsqu ils correspondent à une modification… …   Wikipédia en Français

  • Energy level — A quantum mechanical system or particle that is bound that is, confined spatially can only take on certain discrete values of energy. This contrasts with classical particles, which can have any energy. These discrete values are called energy… …   Wikipedia

  • Molecular vibration — A molecular vibration occurs when atoms in a molecule are in periodic motion while the molecule as a whole has constant translational and rotational motion. The frequency of the periodic motion is known as a vibration frequency, and the typical… …   Wikipedia

  • vibroninis šuolis — statusas T sritis fizika atitikmenys: angl. vibronic transition vok. vibronischer Übergang, m rus. вибронный переход, m pranc. transition vibronique, f …   Fizikos terminų žodynas

  • vibronischer Übergang — vibroninis šuolis statusas T sritis fizika atitikmenys: angl. vibronic transition vok. vibronischer Übergang, m rus. вибронный переход, m pranc. transition vibronique, f …   Fizikos terminų žodynas

Share the article and excerpts

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