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Fine-structure effects in relativistic calculations of the static polarizability of the helium atom |
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| Authors: | A. Derevianko W. R. Johnson V. D. Ovsyannikov V. G. Pal’chikov D. R. Plante G. von Oppen |
| Affiliation: | 1. Department of Physics, University of Notre Dame, Notre Dame, Indiana, 46556, USA 2. Voronezh State University, 394693, Voronezh, Russia 3. National Research Institute of Physicotechnical and Radio-Engineering Measurements (State-Owned), 141570, Mendeleevo, Moscow Region, Russia 4. Department of Mathematics & Computer Science, Stetson University, De Land, Florida, 32720, USA 5. Institute für Atomare und Analytische Physik, Technische Universit?t, D-10623, Berlin, Germany |
| Abstract: | We use the relativistic configuration-interaction method and the model potential method to calculate the scalar and tensor components of the dipole polarizabilities for the excited states 1s3p 3 P 0 and 1s3p 3 P 2 of the helium atom. The calculations of the reduced matrix elements for the resonant terms in the spectral expansion of the polarizabilities are derived using two-electron basis functions of the relativistic Hamiltonian of the atom, a Hamiltonian that incorporates the Coulomb and Breit electron-electron interactions. We formulate a new approach to determining the parameters of the Fuss model potential. Finally, we show that the polarizability values are sensitive to the choice of the wave functions used in the calculations. Zh. éksp. Teor. Fiz. 115, 494–504 (February 1999) |
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