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Dielectronic recombination(DR) of lithium-like Ti19+(1s2 2s) ions via 2s->2pcore excitations has been measured at the Heidelberg heavy ion storage ringTSR. We find that not only external electric fields (0 <= Ey <= 280 V/cm) butalso crossed magnetic fields (30 mT <= Bz <= 80 mT) influence the DR via high-n(2p_j nl)-Rydberg resonances. This result confirms our previous finding forisoelectronic Cl14+ ions [Bartsch T et al, PRL 82, 3779 (1999)] thatexperimentally established the sensitivity of DR to ExB fields. In the presentinvestigation the larger 2p_{1/2}-2p_{3/2} fine structure splitting of Ti19+allowed us to study separately the influence of external fields via the twoseries of Rydberg DR resonances attached to the 2s -> 2p_{1/2} and 2s ->2p_{3/2} excitations of the Li-like core, extracting initial slopes andsaturation fields of the enhancement. We find that for Ey > 80 V/cm the fieldinduced enhancement is about 1.8 times stronger for the 2p_{3/2} series thanfor the 2p_{1/2} series.

Enhanced dielectronic recombination of lithium-like Ti19+ions in externalE×Bfields

Enhanced dielectronic recombination of lithium-like Ti¹⁹⁺ions in externalE×Bfields