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19 April 2024 |
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Enhanced dielectronic recombination of lithium-like Ti19+ ions in external ExB fields | | Timo Bartsch
; Stefan Schippers
; Michael Beutelspacher
; Sebastian Boehm
; Manfred Grieser
; Gerald Gwinner
; Amir A. Saghiri
; Guido Saathoff
; Reinhold Schuch
; Dirk Schwalm
; Andreas Wolf
; Alfred Mueller
; | | Date: |
23 Mar 2000 | | Journal: | Journal of Physics B 33, L453 (2000) | | Subject: | Atomic Physics | physics.atom-ph astro-ph | | Abstract: | Dielectronic recombination(DR) of lithium-like Ti19+(1s2 2s) ions via 2s->2p core excitations has been measured at the Heidelberg heavy ion storage ring TSR. We find that not only external electric fields (0 <= Ey <= 280 V/cm) but also 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 for isoelectronic Cl14+ ions [Bartsch T et al, PRL 82, 3779 (1999)] that experimentally established the sensitivity of DR to ExB fields. In the present investigation 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 two series 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 and saturation fields of the enhancement. We find that for Ey > 80 V/cm the field induced enhancement is about 1.8 times stronger for the 2p_{3/2} series than for the 2p_{1/2} series. | | Source: | arXiv, physics/0003055 | | Services: | Forum | Review | PDF | Favorites | |
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