Transition probabilities data (Frank–Condon factors, Einstein coefficients and absorption oscillator strengths) are the indispensable parameters for the calculations of radiative properties in thermodynamic equilibrium or nonequilibrium plasmas. Constructing an accurate transition probability database is of great significance not only for spectral simulations but also for spectroscopic diagnosis. Although there are already some published transition probabilities data, they are determined by using the relatively old electron transition moments and spectroscopic constants. With the rapid development of ab initio method, many newest data of electron transition moments and spectroscopic constants have been reported. Based upon these data, this study aims to rebuild a higher accuracy transition probabilities database for the main diatomic species in air plasmas produced by high-temperature Earth re-entry. The calculated results were systematically verified by the available numerical and experimental data of vibrational radiative lifetimes. Finally, the spectral absorption line intensities were studied using the constructed transition probabilities to show the importance of high rovibrational at high temperatures.

跃迁概率数据（弗兰克-康登因子、爱因斯坦系数和吸收振子强度）是计算热力学平衡或非平衡等离子体中辐射特性不可或缺的参数。构建准确的跃迁概率数据库不仅对光谱模拟而且对光谱诊断都具有重要意义。虽然已经有一些已发表的跃迁概率数据，但它们是通过使用相对较旧的电子跃迁矩和光谱常数来确定的。随着ab initio的快速发展方法，已经报道了许多最新的电子跃迁矩和光谱常数数据。基于这些数据，本研究旨在为高温再入地球产生的空气等离子体中的主要双原子物种重建更高精度的跃迁概率数据库。计算结果得到了振动辐射寿命的可用数值和实验数据的系统验证。最后，使用构建的跃迁概率研究了光谱吸收线强度，以显示高温下高振动的重要性。