Laser Photoionization Studies of Excited Atomic States

激发原子态的激光光电离研究

• 批准号: 9109164
• 负责人: David Duquette
• 金额: $ 20.12万
• 依托单位: University of Nebraska-Lincoln
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1991
• 资助国家: 美国
• 起止时间: 1991-08-15 至 1995-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9109164&HistoricalAwards=false
• 关键词: Laser; Photoionization; Studies; Excited; Atomic

Accurate measurements of total photoionization cross sections, of photoelectron angular distributions and of the positions and widths of autoionizing resonances near thresholds will be made for excited states of neutral atoms. Continuously tuned pulsed dye lasers will be used to both excite and ionize free atoms in an atomic beam. Absolute photoionization cross sections will be measured using a fluorescence-reduction technique. An angular-selective electron detector/time-of-flight energy analyzer will be used to measure the angular distributions of ejected electrons.

将对中性原子的激发态进行总光电离截面、光电子角分布以及阈值附近自电离共振的位置和宽度的精确测量。 连续调谐的脉冲染料激光器将用于激发和电离原子束中的自由原子。 绝对光电离截面将使用荧光还原技术进行测量。 角度选择性电子探测器/飞行时间能量分析仪将用于测量喷射电子的角度分布。