Absolute emission probabilities from Photon-excitation Photon-emission (PhexPhem) maps for all H2 singly excited electronic states

“PhexPhem图中H2所有单激发态的绝对发射概率”项目旨在通过光子吸收和光子发射截面的定量和绝对测定，确定H2在室温下的绝对光子吸收和发射概率的完整定量实验数据集。在发射中，涉及到单激发态和基态之间所有跃迁过程的全光谱范围将被覆盖。测量将在足够窄的激发光子带宽下进行，以达到吸收中的旋转分辨率和分散发射光谱中的旋转分辨率。更具体地说，它旨在色散记录波长范围在70到180 nm之间的发射光子，并从这些数据确定H2被窄带宽同步辐射激发后的绝对发射概率，在11到18 eV之间的激发光子能量范围内以小步变化。所有数据将以联合和绝对强度标度显示。激发能范围涵盖了从H_2 X （_^1）Σ（_g）（^+） （v=0）的室温填充旋转能级到所有已知的单激发态的激发。将对从实验中确定的能量、吸收和发射概率进行严格比较，并将其与现有工作进行基准比较，从而建立完整统一的定量实验数据集。合并的数据集将提供给天体物理学和等离子体物理学团体，用于建模和数据解释。这些数据集将作为进一步发展描述这些原型分子的理论模型的基础，特别是因为只有少数分离的个体发射强度已经确定。据我所知，目前还不存在这样完整的定量实验和一次实验中所有过渡的统一数据集。

The project “Absolute emission probabilities from PhexPhem maps for all H2 singly excited electronic states” aims at determining complete quantitative experimental data sets for absolute photon absorption and emission probabilities of H2 at room temperature from a quantitative and absolute determination of photon absorption and photon emission cross sections. In emission the full spectral range will be covered relevant to the processes involving all transitions between the singly excited electronic states and the ground state. Measurements will be performed with narrow enough bandwidth of the exciting-photons for rotational resolution in absorption and with rotational resolution in the dispersed emission spectra. More specifically it is intended to dispersively record emitted photons in the wavelength range between 70 and 180 nm and determine from this data absolute emission probabilities after H2 has been excited by narrow bandwidth synchrotron radiation, varied in small steps through the exciting-photon energy range between 11 and 18 eV. All data will be put on a joint and absolute intensity scale. The excitation energy range covers excitation from room temperature populated rotational levels of H_2 X (_^1)Σ(_g)(^+) (v=0) to all known singly excited electronic states. Energies, absorption, and emission probabilities determined from the experiments will be critically compared and benchmarked to existing work such that complete consolidated quantitative experimental data sets will be established. The consolidated data sets will be made available to the astrophysics and plasma physics communities for modelling and data interpretation. The data sets will serve as a basis for a further development of the theoretical models describing these prototype molecule, particularly as only a few separated individual emission intensities have been determined. To the best of my knowledge such complete quantitative experimental and consolidated data sets for all transitions in one experiment do not exist yet.