Basic Ionization, Airglow and Auroral Processes

基本电离、气辉和极光过程

• 批准号: 9988461
• 负责人: Alexander Dalgarno
• 金额: $ 48.42万
• 依托单位: Harvard University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2000
• 资助国家: 美国
• 起止时间: 2000-06-15 至 2004-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9988461&HistoricalAwards=false
• 关键词: Basic; Ionization; Airglow; Auroral; Processes

ATM-9988461DalgarnoThe role of hot oxygen atoms on the chemistry, composition and the thermal structure of the atmosphere will be studied. Doppler profiles of emissions from electronically excited O(1D) atoms will be calculated. They are extensively used to determine thermospheric temperatures and neutral wind velocities. A major source of energetic oxygen atoms in ground (3P) and excited (1D) states is phototodissociation of O2 by solar ultraviolet radiation. Theoretical procedures will be applied to the quantitative determination of the cross sections, branching ratio and energy distributions of O (3P) and O (1D) atoms in the photodissociation of O2.Hot oxygen atoms are an important heating source of the neutral thermosphere. Their rate of thermalization strongly influences the heat and energy balance of the thermosphere. Semiclassical and quantum mechanical scattering calculations will be performed to evaluate the cross sections for collisions with both gases which thermalize the hot O atoms. By inserting the cross sections in the solutions of the Boltzmann equation, the non-equilibrium energy distribution functions of these atoms will be determined.

将研究热氧原子在化学，组成和大气的热结构上的ATM-9988461DALGARNOTHE。 将计算来自电子激发O（1D）原子的发射的多普勒曲线。 它们广泛用于确定热圈温度和中性风速。 地面（3p）和激发（1D）状态中的能量氧原子的主要来源是太阳能紫外线辐射对O2的光暂停分解。理论程序将应用于横截面的定量确定，O（3p）和O（1d）原子在O2.Hot氧原子的光解离时O（3p）和O（1d）原子的能量分布是中性热层的重要加热来源。 它们的热化速率强烈影响热圈的热量和能量平衡。 将执行半古典和量子机械散射计算，以评估两种气体碰撞的横截面，这些气体会造成热O原子的热量。 通过将横截面插入玻尔兹曼方程的溶液中，将确定这些原子的非平衡能量分布函数。