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

所有 H2 单激发电子态的光子激发光子发射 (PhexPhem) 图的绝对发射概率

• 批准号: 512040818
• 负责人: Professor Dr. Arno Ehresmann
• 金额: --
• 依托单位: Experimentalphysik IV: Funktionalisierte dünne Schichten und Physik mit Synchrotronstrahlung
• 依托单位国家: 德国
• 项目类别: Research Grants
• 资助国家: 德国
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/512040818?language=en
• 关键词: Absolute; emission; probabilities; Photon; excitation

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.

项目“来自PhexPhem映射的所有H2单激发电子态的绝对发射概率”旨在通过对光子吸收和光子发射截面的定量和绝对测定，确定室温下H2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，将覆盖与涉及单激发电子态和基态之间的所有跃迁的过程相关的整个光谱范围。测量将进行足够窄的带宽的激发光子的旋转分辨率的吸收和旋转分辨率的分散的发射光谱。更具体地，其旨在分散地记录在70和180 nm之间的波长范围内的发射光子，并从该数据确定在H2被窄带宽同步辐射激发之后的绝对发射概率，窄带宽同步辐射在11和18 eV之间的激发光子能量范围内以小步变化。所有数据将放在一个联合和绝对强度尺度上。激发能范围涵盖了从室温下H_2X（_^1）_g（^+）（v=0）的转动能级到所有已知的单激发电子态的激发。从实验中确定的能量，吸收和发射概率将进行严格的比较，并以现有的工作为基准，以便建立完整的综合定量实验数据集。合并后的数据集将提供给天体物理学和等离子体物理学界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，特别是因为只有几个单独的发射强度已经确定。据我所知，这样完整的定量实验和统一的数据集，在一个实验中的所有过渡还不存在。