Recombination of W19+ ions with electrons: Absolute rate coefficients from a storage-ring experiment and from theoretical calculations
Recombination of W19+ ions with electrons: Absolute rate coefficients from a storage-ring experiment and from theoretical calculations
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DOI：
10.1103/physreva.90.032715
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发表时间：
2014-09
影响因子：
2.9
通讯作者：
K. Spruck;N. Badnell;C. Krantz;O. Novotn'y;A. Becker;D. Bernhardt;M. Grieser;M. Hahn;R. Repnow;D. Savin;A. Wolf;A. Muller;S. S. I. F. A. U. Molekulphysik-S.;Justus-Liebig-University Giessen;Leihgesterner Weg 217;35392 Giessen;G. D. O. Physics;U. Strathclyde;107 Rottenrow;G. 0NG;United Kingdom Max-Planck-Institut fur Kernphysik;1. Saupfercheckweg;69117 Heidelberg;Germany Columbia Astrophysics Laboratory;C. University;550 West 120th Street;New York.;NY 10027;Usa
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文献类型：
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作者：
K. Spruck;N. Badnell;C. Krantz;O. Novotn'y;A. Becker;D. Bernhardt;M. Grieser;M. Hahn;R. Repnow;D. Savin;A. Wolf;A. Muller;S. S. I. F. A. U. Molekulphysik-S.;Justus-Liebig-University Giessen;Leihgesterner Weg 217;35392 Giessen;G. D. O. Physics;U. Strathclyde;107 Rottenrow;G. 0NG;United Kingdom Max-Planck-Institut fur Kernphysik;1. Saupfercheckweg;69117 Heidelberg;Germany Columbia Astrophysics Laboratory;C. University;550 West 120th Street;New York.;NY 10027;Usa
我们提出了通过实验测量和理论计算得出的 W18+([Kr]4d104f10) 电子-离子复合形成 W17+ 的速率系数。在低电子-离子碰撞能量下，合并束流速率系数由强的、相互重叠的复合共振主导。在 W18+ 的分数丰度预计在聚变等离子体中达到峰值的温度范围内，实验得出的麦克斯韦复合率系数比当前推荐用于等离子体建模的系数大 5 至 10 倍。所研究的open-4f系统原子结构的复杂性使得理论计算的要求极高。尽管如此，目前的 Breit-Wigner 分区双电子复合计算结果与实验结果相当吻合。这也使人们对该理论为其他复杂离子的等离子体建模生成足够准确的原子数据的能力充满信心。
We present experimentally measured and theoretically calculated rate coefficients for the electron-ion recombination of W18+([Kr]4d104f10) forming W17+. At low electron-ion collision energies, the merged-beam rate coefficient is dominated by strong, mutually overlapping recombination resonances. In the temperature range where the fractional abundance of W18+ is expected to peak in a fusion plasma, the experimentally derived Maxwellian recombination rate coefficient is 5 to 10 times larger than that which is currently recommended for plasma modeling. The complexity of the atomic structure of the open-4f system under study makes the theoretical calculations extremely demanding. Nevertheless, the results of the present Breit-Wigner partitioned dielectronic recombination calculations agree reasonably well with the experimental findings. This also gives confidence in the ability of the theory to generate sufficiently accurate atomic data for the plasma modeling of other complex ions.