Analytic fits to the recommended electron-impact excitation and ionization cross sections for Be I are presented. The lowest 19 terms of configurations 2$s$ $nl$ ($n$ $\le$ 4) and 2$p^2$ terms below the first ionization limit are considered. The fits are based on the accurate calculations with the convergent close coupling (CCC) method as well as the B-spline R-matrix (BSR) approach. The fitted cross sections provide rate coefficients that are believed to approximate the original data within 10% with very few exceptions. The oscillator strengths for the dipole-allowed transitions between all the considered states are calculated with the relativistic multi-configuration Dirac–Hartree–Fock (MCDHF) approach and compared with the CCC and BSR results. This comparison shows a very good agreement except for a handful of cases with likely strong cancellations.

给出了对于Be I的推荐电子碰撞激发和电离截面的解析拟合。最低19项配置2$s$ $ñ升$ （$ñ$ $\le$ 4）和2$p^2$考虑低于第一电离极限的项。拟合基于基于收敛紧耦合（CCC）方法和B样条R矩阵（BSR）方法的精确计算。拟合的横截面提供速率系数，只有极少数例外，该系数被认为近似于原始数据的10％以内。使用相对论多配置狄拉克-哈特里-福克（MCDHF）方法计算所有考虑状态之间允许偶极跃迁的振荡器强度，并将其与CCC和BSR结果进行比较。这种比较显示出很好的一致性，除了少数几个可能强烈取消的案例。