Journalartikel

Jahr der Veröffentlichung: 2016

Zeitschrift: Physical review A

Bandnummer: 93

Heftnummer: 5

ISSN: 2469-9926

eISSN: 2469-9934

DOI Link: https://doi.org/10.1103/PhysRevA.93.052703

Verlag: American Physical Society

Abstract: 
Experimentally measured and theoretically calculated rate coefficients for the recombination of W19+([Kr] 4d(10) 4f(9)) ions with free electrons (forming W18+) are presented. At low electron-ion collision energies, the merged-beam rate coefficient is dominated by strong, mutually overlapping, recombination resonances as already found previously for the neighboring charge-state ions W-18+ and W20+. In the temperature range where W19+ is expected to form in a collisionally ionized plasma, the experimentally derived recombination rate coefficient deviates by up to a factor of about 20 from the theoretical rate coefficient obtained from the Atomic Data and Analysis Structure database. The present calculations, which employ a Breit-Wigner redistributive partitioning of autoionizing widths for dielectronic recombination via multi-electron resonances, reproduce the experimental findings over the entire temperature range.

Harvard-Zitierstil: Badnell, N., Spruck, K., Krantz, C., Novotny, O., Becker, A., Bernhardt, D., et al. (2016) Recombination of W19+ ions with electrons: Absolute rate coefficients from a storage-ring experiment and from theoretical calculations, Physical review A, 93(5), Article 052703. https://doi.org/10.1103/PhysRevA.93.052703

APA-Zitierstil: Badnell, N., Spruck, K., Krantz, C., Novotny, O., Becker, A., Bernhardt, D., Grieser, M., Hahn, M., Repnow, R., Savin, D., Wolf, A., Müller, A., & Schippers, S. (2016). Recombination of W19+ ions with electrons: Absolute rate coefficients from a storage-ring experiment and from theoretical calculations. Physical review A. 93(5), Article 052703. https://doi.org/10.1103/PhysRevA.93.052703