Phys. Rev. A 76, 023424 (2007) [6 pages]Atomic hyperfine resonances in a magnetic quadrupole fieldReceived 12 January 2007; revised 2 July 2007; published 28 August 2007 The quantum resonances of an atom possessing a single valence electron which shows hyperfine interaction with the nucleus is investigated in the presence of a three-dimensional magnetic quadrupole field. Particular emphasis is put on the study of the interplay of the hyperfine and quadrupole forces. By analyzing the underlying Hamiltonian, a variety of symmetries are revealed, which give rise to a twofold degeneracy of the resonance energies. Our numerical approach employs the complex scaling method and a Sturmian basis set. Several regimes and classes of short- and long-lived resonances are identified. The energies and decay widths of the resonances are characterized by their electronic and nuclear spin properties. © 2007 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevA.76.023424
DOI:
10.1103/PhysRevA.76.023424
PACS:
32.60.+i, 33.55.Be, 32.10.Dk, 33.80.Ps
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