AI 中文总结
研究了Ne³+与电子碰撞重组的速率系数，通过实验和理论计算揭示了等离子体中电离重组行为的温度依赖性及天文物理建模中的应用。
AI 中文摘要
针对Ne³+ + e⁻ → Ne²+的过程，研究了电离重组（DR）在重离子存储环CRYRING@ESR的合并束装置中的情况。测量了从0到25 eV电子-离子碰撞能范围内的能量依赖性DR速率系数α(E)。测量覆盖了与2s→2p壳层激发相关的完整DR共振级联。主要离子束估计由44%的基态离子组成，其余分布在长寿命的亚稳态能级中。除了测量外，还进行了量子力学计算，计算DR截面。理论处理包括来自基态和激发亚稳态初始能级的贡献，权重根据估计的束流组成进行加权。从实验能量分辨光谱中推导出温度依赖的DR等离子体重组速率系数α_exp(T)（PRRC）。在Ne³+在碰撞性电离等离子体中丰富的温度域，当前结果与现有和先前的理论预测良好一致。在具有特征的低温等离子体（如光致电离等离子体）中，实验推导的DR等离子体速率系数略大于已发表的理论值，并且在实验不确定性范围内不一致。给出了实验推导的DR PRRC参数化拟合，以便于方便地纳入天体物理建模代码。
英文摘要
Dielectronic recombination (DR) for the process Ne$^{3+}$ + e$^{-}$ $\rightarrow$ Ne$^{2+}$ was investigated in a merged-beams arrangement at the heavy-ion storage ring CRYRING@ESR. The energy-dependent DR rate coefficient, $α(E)$ was measured over the electron-ion collision energy range from 0 to 25 eV. The measurements cover the complete set of DR resonance series associated with $2s\to2p$ core excitations. The primary ion beam is estimated to have consisted of $44\%$ of the ions in the ground state, with the remainder distributed among long-lived metastable levels. In addition to the measurements we carried out quantum mechanical calculations of DR cross sections. The theoretical treatment includes contributions from the ground and excited metastable initial levels, weighted according to the estimated beam composition. From the experimental energy-resolved spectra, we derive a temperature dependent DR plasma recombination rate coefficient $α_\mathrm{exp}(T)$ (PRRC). In the temperature domain where Ne$^{3+}$ is abundant in collisionally ionized plasmas, the present results show a good agreement with the present and with previous theoretical predictions. In the low-temperature regime characteristic for photoionized plasmas, the experimentally derived DR plasma rate coefficient is slightly larger than the published theoretical ones and does not agree within the experimental uncertainties. Parametrized fits of the experimentally derived DR PRRC are presented in order to facilitate an easy inclusion into astrophysical modelling codes.
