Berlin 2001 – wissenschaftliches Programm
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A: Atomphysik
A 20: Atoms in Fields
A 20.11: Vortrag
Freitag, 6. April 2001, 18:15–18:30, H1058
Finite-difference calculations for atoms and simple diatomic molecules in strong magnetic and static electric fields — •Mikhail Ivanov — Institute of Precambrian Geology and Geochronology (IPGG), Russian Academy of Sciences, Nab. Makarova 2, St.Petersburg, 199034, Russia
Fully numerical mesh solution of 2D and 3D quantum equations of the Schroedinger and Hartree-Fock type allows us to work with wavefunctions which have much more flexible geometry than the wavefunctions in the traditional basis-set approach. This flexibility is important for calculations of atoms and molecules in strong external electric and magnetic fields. For the magnetic fields we provide Hartree-Fock calculations for He, Li, Be, B, and C [1-2] including the first comprehensive investigation of the ground state configurations of these atoms in fields from B=0 up to B=2.35· 109T and a study of all the atoms with 1≤ Z≤ 10 and their ions A+ in the high-field fully spin-polarised regime. The results on strong electric fields are the correct solution of the Schroedinger equation for the H2+ ion (energies and decay rates) and the hydrogen atom in strong parallel electric and magnetic fields.
[1] M.V. Ivanov, J. Phys. B: At. Mol. Opt. Phys., 27, 4513 (1994); 31, 2833 (1998); Phys. Lett. A, 239, 72 (1998)
[2] M.V. Ivanov and P. Schmelcher, Phys. Rev. A, 57, 3793 (1998); 60, 3558 (1999); 61, 022505 (2000)