Journal article

Publication year: 2001

Pages: 1027-1037

Journal: The Astrophysical Journal

Volume number: 555

Issue number: 2

ISSN: 0004-637X

Open access status: Green

DOI Link: https://doi.org/10.1086/321512

Publisher: American Astronomical Society

Abstract: 
The low-energy C IV dielectronic recombination (DR) rate coefficient associated with 2s --> 2p Deltan = 0 excitations of this lithium-like ion has been measured with high-energy resolution at the heavy-ion storage ring TSR of the Max-Planck-Institut Kernphysik in Heidelberg, Germany. The experimental fur procedure and especially the experimental detection probabilities for the high Rydberg states produced by the recombination of this ion are discussed in detail. From the experimental data a Maxwellian plasma rate coefficient is derived with +/-15% systematic uncertainty and parameterized for ready use in plasma-modeling codes. Our experimental result especially benchmarks the plasma rate coefficient below 10(4) K where DR occurs predominantly via C III (1s(2)2p4l) intermediate states and where existing theories differ by orders of magnitude. Furthermore, we find that, to within our systematic uncertainty of 15%, the total dielectronic and radiative C IV recombination can be represented by the incoherent sum of our DR rate coefficient and the radiative recombination rate coefficient of Pequignot and coworkers.

Harvard Citation style: Schippers, S., Müller, A., Gwinner, G., Linkemann, J., Saghiri, A. and Wolf, A. (2001) Storage Ring Measurement of the C IV Recombination Rate Coefficient, The Astrophysical Journal, 555(2), pp. 1027-1037. https://doi.org/10.1086/321512

APA Citation style: Schippers, S., Müller, A., Gwinner, G., Linkemann, J., Saghiri, A., & Wolf, A. (2001). Storage Ring Measurement of the C IV Recombination Rate Coefficient. The Astrophysical Journal. 555(2), 1027-1037. https://doi.org/10.1086/321512