This study introduced a new model for quantitative analysis of the state-resolved laser-induced fluorescence signal of diatomic molecules, namely StaR-LIF. This model is built upon a master equation of the collisional-radiative transfer processes, which incorporated the latest data on the collisional energy transfer rates between individual spin- and parity-resolved rovibronic quantum levels, together with the most recent updates on the energy levels, line strengths and broadening/shift parameters of the relevant absorption and fluorescence transitions. To facilitate the use of this model, a web-based graphic user interface has been developed and made available at https://starlif.pku.edu.cn. Example applications of the current model have been demonstrated for NO, OH and CH, including parametric studies on the effects of variable pulse width and saturating excitation, as well as the temporal evolution of fluorescence spectrum during collisional transfer. The StaR-LIF model can provide quantitative modeling and analysis capabilities over a wide range of gasdynamic and excitation conditions, and promises to be useful in future LIF studies of complex reacting flows.

中文翻译：

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StaR-LIF：双原子分子的状态分辨激光诱导荧光建模


本研究引入了一种定量分析双原子分子状态分辨激光诱导荧光信号的新模型，即 StaR-LIF。该模型建立在碰撞-辐射转移过程的主方程之上，该方程结合了有关单个自旋和奇偶解析 rovibric 量子能级之间碰撞能量转移速率的最新数据，以及有关相关吸收和荧光跃迁的能级、线强和展宽/偏移参数的最新更新。为了方便使用此模型，已经开发了一个基于 Web 的图形用户界面，并在 https://starlif.pku.edu.cn 上提供。当前模型的示例应用已经证明用于 NO、OH 和 CH，包括对可变脉冲宽度和饱和激发影响的参数研究，以及碰撞转移过程中荧光光谱的时间演变。StaR-LIF 模型可以在广泛的气体动力学和激励条件下提供定量建模和分析功能，并有望在未来复杂反应流的 LIF 研究中发挥作用。