Electromagnetic transitions of the helium atom in superstrong magnetic fields

Abstract

We investigate the electromagnetic transition probabilities for the helium atom embedded in a superstrong magnetic field taking into account the finite nuclear mass. We address the regime γ=100-10000 a.u. studying several excited states for each symmetry, i.e. for the magnetic quantum numbers 0,-1,-2,-3, positive and negative z parity and singlet and triplet symmetry. The oscillator strengths as a function of the magnetic field, and in particular the influence of the finite nuclear mass on the oscillator strengths are shown and analyzed.

10 pages, 8 figures

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• Hydrogen and Helium atoms in strong magnetic fields
• Diffusion Monte Carlo calculations for the ground states of atoms and ions in neutron star magnetic fields
• Radiative transitions of the helium atom in highly magnetized neutron star atmospheres
• The carbon atom in intense magnetic fields
• A two-dimensional pseudospectral Hartree-Fock method for low-Z atoms in intense magnetic fields
• Resonances of the helium atom in a strong magnetic field
• Partially ionized atmospheres of neutron stars with strong magnetic fields