electron transition
81White dwarf — For other uses, see White dwarf (disambiguation). Image of Sirius A and Sirius B taken by the Hubble Space Telescope. Sirius B, which is a white dwarf, can be seen as a faint pinprick of light to the lower left of the much brighter Sirius A …
82Spontaneous emission — is the process by which a light source such as an atom, molecule, nanocrystal or nucleus in an excited state undergoes a transition to the ground state and emits a photon. Spontaneous emission of light or luminescence is a fundamental process… …
83Lyman-alpha line — In physics, the Lyman alpha line is a spectral line of hydrogen, or more generally of one electron ions, in the Lyman series, emitted when the electron falls from the n = 2 orbital to the n = 1 orbital, where n is the principal quantum number. In …
84Rubredoxin — Rubredoxins are a class of low molecular weight iron containing proteins found in sulfur metabolizing bacteria and archaea. Sometimes rubredoxins are classified as iron sulfur proteins; however, in contrast to iron sulfur proteins, rubredoxins do …
85Laporte rule — The Laporte rule is a spectroscopic selection rule named after Otto Laporte. [cite journal | author = Laporte, O. | coauthors = Meggers, W.F. | year = 1925 | title = Some rules of spectral structure | journal = Journal of the Optical Society of… …
86Atomic absorption spectroscopy — In analytical chemistry, atomic absorption spectroscopy is a technique for determining the concentration of a particular metal element in a sample.cite book |author=Sperling, Michael B.; Welz, Bernhard |title=Atomic Absorption Spectrometry… …
87Orion Nebula — The entire Orion Nebula in visible light. Credit: NASA/ESA Observation data: J2000 epoch …
88commutation — [ kɔmytasjɔ̃ ] n. f. • déb. XIIe; lat. commutatio « changement » 1 ♦ Didact. Substitution, remplacement. Commutation et permutation. Spécialt Substitution d un élément par un autre, dégageant des distinctions pertinentes (notamment en… …
89TNP1 — Transition protein 1 (during histone to protamine replacement), also known as TNP1, is a human gene.cite web | title = Entrez Gene: TNP1 transition protein 1 (during histone to protamine replacement)| url =… …
90Électrons de coeur — Électron de cœur Cet article court présente un sujet plus amplement développé ici : Liaison chimique et Orbitale atomique. En physique ou en chimie, on introduit l expression électron de cœur pour désigner les électrons dont on considère qu… …
