hydrogen fine structure

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• Fine structure — Interference fringes, showing fine structure (splitting) of a cooled deuterium source, viewed through a Fabry Pérot étalon. In atomic physics, the fine structure describes the splitting of the spectral lines of atoms due to first order… …   Wikipedia

• Fine-structure constant — The fine structure constant or Sommerfeld fine structure constant, usually denoted alpha ,, is the fundamental physical constant characterizing the strength of the electromagnetic interaction.It is a dimensionless quantity, and thus its numerical …   Wikipedia

• fine structure — /fuyn/, Physics. a group of lines that are observed in the spectra of certain elements, as hydrogen, and that are caused by various couplings of the azimuthal quantum number and the angular momentum quantum number. Cf. hyperfine structure. [1915… …   Universalium

• fine structure — fine′ struc′ture [[t]faɪn[/t]] n. 1) phs a group of lines that are observed in the spectra of certain elements, as hydrogen 2) cbl the aggregate of components of the cytoskeleton • Etymology: 1915–20 …   From formal English to slang

• Structure fine — de l hydrogène : influence de la levée partielle de la dégénérescence du niveau d énergie n = 2 sur la raie Lyman α. En physique atomique, la structure fine de la raie spectrale d un atome correspond à sa séparation en plusieurs composantes… …   Wikipédia en Français

• Hydrogen atom — Stable Isotope isotope name = Hydrogen 1 isotope filename = hydrogen 1.png alternate names = protium mass number = 1 symbol = H num neutrons = 0 num protons = 1 abundance = 99.985% mass = 1.007825 spin = ½+ excess energy = 7288.969 error1 = 0.001 …   Wikipedia

• Structure hyperfine — La structure hyperfine d un niveau d énergie dans un atome consiste en une séparation de ce niveau en états d énergie très proches. Il s observe essentiellement par une raie spectrale dans le domaine radio ou micro onde, comme la raie à 21… …   Wikipédia en Français

• Hydrogen line — For hydrogen lines in general, see Hydrogen spectral series. The hydrogen line, 21 centimeter line or HI line refers to the electromagnetic radiation spectral line that is created by a change in the energy state of neutral hydrogen atoms. This… …   Wikipedia

• Fine-tuned Universe — The fine tuned Universe is the idea that the conditions that allow life in the Universe can only occur when certain universal physical constants lie within a very narrow range, so that if any of several fundamental constants were only slightly… …   Wikipedia

• Hyperfine structure — In atomic physics, hyperfine coupling is the weak magnetic interaction between electrons and nuclei. Hyperfine coupling causes the hyperfine splitting of atomic or molecular energy levels. The totality of energy levels spawned by hyperfine… …   Wikipedia

• Secondary structure prediction — is a set of techniques in bioinformatics that aim to predict the local secondary structures of proteins and RNA sequences based only on knowledge of their primary structure amino acid or nucleotide sequence, respectively. For proteins, a… …   Wikipedia