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Atoms spectra

  • Carlo Ferrari
Part of the International Centre for Mechanical Sciences book series (CISM, volume 146)

Abstract

Consider an atom in an excited state: it is possible to calculate the probability of the transition of this atom to another state of lower energy-level, and a basic postulate of the quantum theory is that, when an atom jumps from one state of energy є n to another state of less energy є m′ spontaneously, it emits radiation in accordance with the law
(3.1)
In this relation є nm is the quantum of energy (or photon) emitted by the atom; while v nm is the frequency of the radiation: thus, for the Bohr-Sommerfeld model of the H atom, the possible frequencies of the emitted radiation are
(3.2)
where μ is the reduced mass of the electron (μ = mame/ma + me ≅ me) if ma and me are respectively the masses of the atom and of the electron); Ry = 2 π 2 μe4/h3 (and therefore hRy = 13.957 e v = 21.8368 × 10−12 erg.) is the so called Rydberg constant.

Keywords

Spectral Line Statistical Weight Discrete Spectrum Source Function Atom Spectrum 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Wien 1974

Authors and Affiliations

  • Carlo Ferrari
    • 1
  1. 1.Technical UniversityTurinItaly

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