Laser Photoionization Studies of Excited Atomic States

对于中性原子的激发态，将精确测量总的光致电离截面、光电子角分布以及阈值附近自电离共振的位置和宽度。连续调谐脉冲染料激光器将被用来激发和电离原子束中的自由原子。绝对光致电离截面将使用荧光还原技术测量。将使用角度选择性电子探测器/飞行时间能量分析器来测量抛射电子的角分布。

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.