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The hydrogen spectral series can be expressed simply in terms of the Rydberg constant for hydrogen and the Rydberg formula. In atomic physics , Rydberg unit of energy , symbol Ry, corresponds to the energy of the photon whose wavenumber is the Rydberg constant, i.e. the ionization energy of the hydrogen atom in a simplified Bohr model.
This template provides easy inclusion of the latest CODATA recommended values of physical constants in articles. It gives the most recent values published, and will be updated when newer values become available, which is typically every four years.
Johannes (Janne) Robert Rydberg (Swedish: [ˈrŷːdbærj]; 8 November 1854 – 28 December 1919) was a Swedish physicist mainly known for devising the Rydberg formula, in 1888, which is used to describe the wavelengths of photons (of visible light and other electromagnetic radiation) emitted by changes in the energy level of an electron in a hydrogen atom.
The measurement of the splitting between the 2 3 S 1 and the 1 3 S 1 energy levels of positronium yields α −1 = 137.034(16). Measurements of α can also be extracted from the positronium decay rate. Positronium decays through the annihilation of the electron and the positron into two or more gamma-ray photons.
The Rydberg constant describes the energy levels in a hydrogen atom with the nonrelativistic approximation . The only viable way to fix the Rydberg constant involves trapping and cooling hydrogen. Unfortunately, this is difficult because it is very light and the atoms move very fast, causing Doppler shifts.
Rydberg states have energies converging on the energy of the ion. The ionization energy threshold is the energy required to completely liberate an electron from the ionic core of an atom or molecule. In practice, a Rydberg wave packet is created by a laser pulse on a hydrogenic atom and thus populates a superposition of Rydberg states. [3]
Measuring the Rydberg constant confirms the proportions of the values of the other five constants. Melchoir 16:39, 16 January 2006 (UTC) I think user 163.1.146.226 may not have understood that in high-precision measurement of fundamental constants, one normally determines combinations of constants from a single experiment.
Rydberg matter [1] is an exotic phase of matter formed by Rydberg atoms; it was predicted around 1980 by É. A. Manykin, M. I. Ozhovan and P. P. Poluéktov. [2] [3] It has been formed from various elements like caesium, [4] potassium, [5] hydrogen [6] [7] and nitrogen; [8] studies have been conducted on theoretical possibilities like sodium, beryllium, magnesium and calcium. [9]