Radiative transition probabilities of diatomic N2, O2, N2 + and NO in air plasmas
Radiative transition probabilities of diatomic N2, O2, N2 + and NO in air plasmas
复制标题
空气等离子体中双原子 N2、O2、N2 和 NO 的辐射跃迁概率
DOI：
10.1088/1402-4896/ac2084
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发表时间：
2021
期刊：
影响因子：
2.9
通讯作者：
Fangyan Li
中科院分区：
文献类型：
--
作者：
Rihui Liang;Yanming Liu;Fangyan Li
跃迁几率数据(Frank-Condon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辐射性质不可缺少的参数。建立准确的跃迁概率数据库不仅对光谱模拟具有重要意义，而且对光谱诊断也具有重要意义。虽然已经有一些已发表的跃迁几率数据，但它们是通过相对较旧的电子跃迁矩和光谱常数来确定的。随着从头算方法的迅速发展，人们报道了许多最新的电子跃迁矩和光谱常数的数据。基于这些数据，本研究旨在为高温地球再入产生的大气等离子体中的主要双原子物种重建一个更高精度的跃迁概率数据库。用已有的振动辐射寿命数值和实验数据对计算结果进行了系统的验证。最后，利用所构造的跃迁几率研究了光谱吸收谱线强度，以说明高温下高振动的重要性。
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.