Journal article

Publication year: 2000

Journal: Physical review A

Volume number: 62

Issue number: 2

ISSN: 2469-9926

eISSN: 2469-9934

Open access status: Green

DOI Link: https://doi.org/10.1103/PhysRevA.62.022708

Publisher: American Physical Society

Abstract: 
Absolute dielectronic recombination (DR) rates for lithiumlike Ni25+(1s(2)2s) 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 Delta n = 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 Delta n = 0 DR at electron temperatures between 0.5 and 200 eV are provided. For increasing electric-field strength we find that for both the 2p(1/2) and 2p(3/2) series of Ni24+(1s(2)2p(j)nl) 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 Ni25+ is remarkably lower than that found in previous measurements with lighter isoelectronic Si11+, Cl14+, and Ti19+ ions [T. Bartsch et al., Phys. Rev. Lett. 79, 2233 (1997); 82, 3779 (1999); J. Phys. B 33, L453 (2000)], 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 Delta n = 0 DR of Ni25+ 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 lithiumlike Ni2⁢5+ ions: High-resolution rate coefficients and influence of external crossed electric and magnetic fields, Physical review A, 62(2), Article 022708. https://doi.org/10.1103/PhysRevA.62.022708

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 lithiumlike Ni2⁢5+ ions: High-resolution rate coefficients and influence of external crossed electric and magnetic fields. Physical review A. 62(2), Article 022708. https://doi.org/10.1103/PhysRevA.62.022708