Electron-ion recombination rate coefficients for C II forming C I

Ali, SafdarStockholms universitet,Fysikum,Univ Stockholm, Dept Phys, S-10691 Stockholm, Sweden (författare)

We have determined absolute dielectronic recombination rate coefficients for C II, using the CRYRING heavy-ions storage ring. The resonances due to 2s-2p (∆n = 0) core excitations are detected in the center-of-mass energy range of 0-15 eV. The experimental results are compared with intermediate coupling AUTOSTRUCTURE calculations. Plasma rate coefficients are obtained from the DR spectrum by convoluting it with a Maxwell-Boltzmann energy distribution for temperatures in the range of 103-106 K. The derived temperature dependent plasma recombination rate coefficients are presented graphically to compare with the theoretical data available in literature and parameterized by using a fit formula for convenient use in plasma modelling codes. In the temperature range of 103-2×104 K, our experimental results show that previous calculations severely underestimate the plasma rate coefficients and also our AUTOSTRUCTURE calculation does not reproduce the experimental plasma rate coefficients well. Above 2×104 K the agreement between the experimental and theoretical rate coefficients is much better, and the deviations are smaller than the estimated uncertainties.

Orban, IstvanStockholms universitet,Fysikum,Univ Stockholm, Dept Phys, S-10691 Stockholm, Sweden(Swepub:su)orban (författare)
Mahmood, Sultan,1969-Stockholms universitet,Fysikum,Univ Stockholm, Dept Phys, S-10691 Stockholm, Sweden(Swepub:su)sultan (författare)
Altun, ZikriMarmara Univ, Dept Phys, TR-81040 Istanbul, Turkey (författare)
Glans, PeterMittuniversitetet,Institutionen för tillämpad naturvetenskap och design (-2013)(Swepub:miun)petgla (författare)
Schuch, ReinholdStockholms universitet,Fysikum,Univ Stockholm, Dept Phys, S-10691 Stockholm, Sweden(Swepub:su)schuch (författare)
Stockholms universitetFysikum (creator_code:org_t)

Av författaren/redakt...: Ali, Safdar; Orban, Istvan; Mahmood, Sultan, ...; Altun, Zikri; Glans, Peter; Schuch, Reinhold

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