García-Abenza Adrián, Lozano Ana I, Oller Juan C, Rosado Jaime, Blanco Francisco, Limão-Vieira Paulo, García Gustavo
Instituto de Física Fundamental, Consejo Superior de Investigaciones Científicas, Serrano 113-bis, 28006 Madrid, Spain.
Agencia Estatal de Meteorología (AEMET), Centro Meteorológico de Málaga, Calle Demóstenes 4, 29010 Málaga, Spain.
Molecules. 2025 Feb 27;30(5):1097. doi: 10.3390/molecules30051097.
Total electron scattering cross sections (TCSs), in the energy range of 1-100 eV, have been measured with a high-resolution magnetically confined electron transmission apparatus, with total uncertainty limits estimated to be within ±5%. No previous experimental TCS data have been found for comparison. Electron attachment resonances, corresponding to transient negative ion formation, have been identified for energies below 20 eV by analyzing their contribution to the measured local maxima of the TCSs. Most of these resonances were observed for the first time. By means of our screening-corrected additivity rule (including interference effects) calculation method (IAM-SCAR + I), we extended TCS values to up to 1000 eV. This method also provides integral elastic, electronic excitation, and ionization cross sections for impact energies above 20 eV with total uncertainties of about ±10%. Comparisons, where possible, of the present electron scattering values with other values available in the literature are given.
使用高分辨率磁约束电子传输装置测量了能量范围为1 - 100 eV的总电子散射截面(TCS),估计总不确定度限制在±5%以内。未找到以前的实验TCS数据进行比较。通过分析它们对测量的TCS局部最大值的贡献,已识别出能量低于20 eV时对应于瞬态负离子形成的电子附着共振。这些共振中的大多数是首次观察到的。通过我们的筛选校正加性规则(包括干涉效应)计算方法(IAM - SCAR + I),我们将TCS值扩展到高达1000 eV。该方法还为能量高于20 eV的碰撞提供了积分弹性、电子激发和电离截面,总不确定度约为±10%。在可能的情况下,给出了当前电子散射值与文献中其他可用值的比较。