Fundamental Studies in Atomic Collisions (Physics)

原子碰撞基础研究（物理学）

• 批准号: 8809083
• 负责人: John Risley
• 金额: $ 21万
• 依托单位: North Carolina State University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1988
• 资助国家: 美国
• 起止时间: 1988-08-15 至 1991-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8809083&HistoricalAwards=false
• 关键词: Fundamental; Studies; Atomic; Collisions; Physics

Measurements of the density matrix for collisionally produced H atoms for electron transfer collision of H+ on He will be continued. By fully modeling the collision region and calculating the transition amplitudes of the Stark-mixed hydrogenic states, the n=3 density matrix with 14 independent parameters, associated with the newly formed hydrogen atoms, can be fit to the measured signals. Significant improvements in the measuring apparatus and in the analysis associated with the fit of the density matrix to the optical signals will be utilized in the further measurements. The resulting changes have so far produced measured values of the density matrix that are in striking agreement with theory, for the most part. Important differences do remain, and further tests and extension are warranted-especially for the n=2 manifold and for the differential measurement. Because of significant, recent advances in atomic theory the measurement program is now directed toward a detailed understanding of differences and similarities between the calculated density matrix and the measured one.

对H+在He上的电子转移碰撞产生的H原子的密度矩阵的测量将继续进行。通过对碰撞区域进行全面建模并计算stark -混合氢态的跃迁幅度，可以拟合出与新形成氢原子相关的具有14个独立参数的n=3密度矩阵。测量仪器和与密度矩阵与光信号的拟合相关的分析方面的重大改进将用于进一步的测量。由此产生的变化到目前为止，密度矩阵的测量值在很大程度上与理论惊人地一致。重要的差异仍然存在，进一步的测试和扩展是必要的-特别是对于n=2流形和微分测量。由于最近原子理论的重大进展，测量程序现在正朝着详细了解计算密度矩阵与测量密度矩阵之间的异同的方向发展。