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A: Atomphysik

A 12: Spektroskopie I

A 12.4: Talk

Wednesday, April 5, 2000, 09:45–10:00, HS II

Theoretical investigations on relativistic, relaxation and correlation effects in the spectra of Cu II — •C. Z. Dong, S. Fritzsche, and B. Fricke — Fachbereich Physik, Universität Kassel, 34109 Kassel.

The Cu II spectrum has attracted considerable interest both, in theory and experiment. This is because it has important applications in plasma diagnostics, for the development of copper vapour lasers as well as for the measurement of Cu abundances in interstellar HI clouds. During the past years, many calculations and measurements regarding the energy levels and lifetimes of Cu II ion have therefore been performed [1,2]. However, results from different computations and experiments scatter quite remarkably. In our present work, the influences of relativistic, relaxation and correlation effects on the low–lying energy levels of the 3d¹⁰ , 3d⁹ 4s and 3d⁹ 4p configurations and on the E1 and E2 transition probabilities have been studied systematically by applying multiconfiguration Dirac–Fock (MCDF) wavefunctions of elaborate size. Comparing with experiment, we not only obtained a clearly improved set of transition data but will also discuss a useful way to investigate others ions along the nickel isoelectronic sequence.

[1] E. H. Pinnington et al., Can. J. Phys. 75, 1 (1997).

[2] J. R. Crespo Lopez-Urruti et al., J. Quant. Spectrosc. Radiat. Transfer 52, 111 (1994).