The beryllium atom and beryllium positive ion in strong magnetic fields

Abstract

The ground and a few excited states of the beryllium atom in external uniform magnetic fields are calculated by means of our 2D mesh Hartree-Fock method for field strengths ranging from zero up to 2.35*10^9T. With changing field strength the ground state of the Be atom undergoes three transitions involving four different electronic configurations which belong to three groups with different spin projections S_z=0,-1,-2. For weak fields the ground state configuration arises from the 1s^2 2s^2, S_z=0 configuration. With increasing field strength the ground state evolves into the two S_z=-1 configurations 1s^22s 2p_{-1} and 1s^2 2p_{-1}3d_{-2}, followed by the fully spin polarised S_z=-2 configuration 1s2p_{-1}3d_{-2}4f_{-3}. The latter configuration forms the ground state of the beryllium atom in the high field regime γ>4.567. The analogous calculations for the Be^+ ion provide the sequence of the three following ground state configurations: 1s^22s and 1s^22p_{-1} (S_z=-1/2) and 1s2p_{-1}3d_{-2} (S_z=-3/2).

15 pages, 7 figures

Cited by in corpus (11)

• A review on non-relativistic fully numerical electronic structure calculations on atoms and diatomic molecules
• Lithium in strong magnetic fields
• Cold and Ultracold Rydberg Atoms in Strong Magnetic Fields
• Beryllium in strong magnetic fields
• Helium in superstrong magnetic fields
• Fully numerical electronic structure calculations on diatomic molecules in weak to strong magnetic fields
• Hydrogen and Helium atoms in strong magnetic fields
• Accurate Anisotropic Gaussian Type Orbital Basis Sets for Atoms in Strong Magnetic Fields
• The carbon atom in intense magnetic fields
• A two-dimensional pseudospectral Hartree-Fock method for low-Z atoms in intense magnetic fields
• Insight on Gaussian basis set truncation errors in weak to intermediate magnetic fields with an approximate Hamiltonian