Hydrogen and helium spectra in large magnetic fields |
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| Authors: | R H Garstang S B Kemic |
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| Institution: | (1) Joint Institute for Laboratory Astrophysics, University of Colorado and National Bureau of Standards, Boulder, Colo., USA;(2) Dept. of Physics and Astrophysics, University of Colorado, Boulder, Colo., USA |
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| Abstract: | The energy levels and wave functions of hydrogen and helium atoms in the presence of large ( 107G) magnetic fields are found by assuming that the eigenvalues and eigenvectors may be approximated by those of a truncated Hamiltonian matrix. In these atoms, fields of this size produce, in addition to the usual Paschen-Back effect, a quadratic Zeeman effect. This contributes an upward shift to the energy of all levels, which at sufficiently high fields dominates the Paschen-Back splitting.The behavior of a number of eigenvalues and wave functions as a function of magnetic field is presented. The effects of the field on the wavelengths and strengths of the components of H and the helium lines  4471, 4026 and 4120 as well as the forbidden 4025 are examined. In hydrogen the lines are split into components attributed to the now nondegenerate transitionsnlm
l n lml. In helium forbidden lines are excited, which may develop strengths larger than those of the allowed lines. |
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