Radiative and thermal widths of Landau-excited hydrogen atoms in very strong magnetic fields

Details Radiative and thermal widths of Landau-excited hydrogen atoms in very strong magnetic fields Radiative and thermal widths of Landau-excited hydrogen atoms in very strong magnetic fields

Aug 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983jphb...16.2937w&link_type=abstract

Journal of Physics B - Atomic and Molecular Physics (ISSN 0022-3700), vol. 16, Aug. 28, 1983, p. 2937-2943. Research supported b

Physics

10

Hydrogen Atoms, Landau Factor, Neutron Stars, Radiative Lifetime, Stellar Magnetic Fields, Coulomb Potential, Cyclotron Resonance, Electron Mobility, Magnetic Flux, Protons

Scientific paper

It is proved that in magnetic fields B approximately equal to or greater than 10 to the 7th T, which are characteristic of neutron stars, the lifetime of an electron in an excited Landau level (N equal to or greater than 1) bound to a proton becomes identical to that of an electron moving freely along the magnetic field lines, viz. the lifetime with respect to cyclotron transitions. The associated widths are found to be larger than or at least comparable with the Coulomb binding energies (depending on the magnetic field strength) whence the nature of these states is obliterated. It is also shown that the anomalous magnetic moment of the electron and the finite mass of the proton cause additional level shifts comparable in magnitude with the Coulomb energies. Furthermore thermal line broadening is investigated and it is found that, as a consequence of the pronounced anisotropy of the effective masses for motion parallel and perpendicular to the field, thermal broadening is strongly reduced for emission perpendicular to the field.

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