E-paper

Publication year: 2000

Journal: arXiv

DOI Link: https://doi.org/10.48550/arXiv.physics/0002036

Publisher: Arxiv.org

Abstract: 

Absolute dielectronic recombination (DR) rates for lithium-like Ni   (   ) ions were measured at high-energy resolution at the Heidelberg heavy-ion storage ring TSR. We studied the center-of-mass energy range 0--130 eV which covers all  =0 core excitations. The influence of external crossed electric (0--300 V/cm) and magnetic (41.8--80.1 mT) fields was investigated. For the measurement at near-zero electric field resonance energies and strengths are given for Rydberg levels up to n 32; also Maxwellian plasma rate coefficients for the  =0 DR at electron temperatures between 0.5 and 200 eV are provided. For increasing electric field strength we find that for both the     and the     series of Ni   (     ) Rydberg resonances with n>30 the DR rate coefficient increases approximately linearly by up to a factor of 1.5. The relative increase due to the applied electric field for Ni    is remarkably lower than that found in previous measurements with lighter isoelectronic Si   , Cl    and also Ti    ions, [T. Bartsch et al, Phys. Rev. Lett. {\bf 79}, 2233 (1997); {\bf 82}, 3779 (1999) and to be published] and in contrast to the results for lighter ions no clear dependence of the electric field enhancement on the magnetic field strength is found. The Maxwellian plasma rate coefficients for  =0 DR of Ni    are enhanced by at most 11% in the presence of the strongest experimentally applied fields.

Harvard Citation style: Schippers, S., Bartsch, T., Brandau, C., Müller, A., Gwinner, G., Wissler, G., et al. (2000) Dielectronic recombination of lithium-like Ni25+ ions - high resolution rate coefficients and influence of external crossed E and B fields [Preprint]. arXiv, Article physics/0002036. https://doi.org/10.48550/arXiv.physics/0002036

APA Citation style: Schippers, S., Bartsch, T., Brandau, C., Müller, A., Gwinner, G., Wissler, G., Beutelspacher, M., Grieser, M., Wolf, A., & Phaneuf, R. (2000). Dielectronic recombination of lithium-like Ni25+ ions - high resolution rate coefficients and influence of external crossed E and B fields. arXiv. https://doi.org/10.48550/arXiv.physics/0002036