原子与分子物理学报2016，Vol.33Issue(6)：1042-1047,6.DOI:10.3969/j.issn.1000-0364.2016.12.014
铝原子激发态近阈限光电离截面测量
Photoionization cross section measurements of the excited states of aluminum in the above-threshold region
摘要
Abstract
In this paper, we present the photoionization cross sections of the excited states of aluminum by using the technique of the laser pump-probe and resonance ionization in conjunction with a molecular beam and time of flight ( TOF) mass spectrometer. The photoionization cross sections are deduced from the dependence of ion yields on the laser intensity of the probe laser. The ionizing energy dependent behavior of the measured photoion-ization cross sections from the 3s23d 2 D3/2 and 3s23d 2 D5/2 states of aluminum is reported . The photoionization cross-sections at threshold and above threshold regions(0-2. 98 eV) are measured. The measured values are in the range from 15. 6 ± 1. 7 Mb to 2. 3 ± 0. 9 Mb. The measured lifetimes of the 3s23d(2D3/2) and 3s23d(2D5/2) states are 17. 6 ± 1. 8 ns and 16. 9 ± 1. 7 ns, respectively. The upper limit of the overall root-mean-square er-ror in the absolute photoionization cross-section measurements is 17%.关键词
光电离截面/激发态寿命/电离富余能Key words
The ionization cross-section/Pump-probe/Excited-state/Aluminum分类
数理科学引用本文复制引用
程在起,周晓雨,曲泽华,李春胜,周健熙,姚关心,郑贤锋,崔执凤..铝原子激发态近阈限光电离截面测量[J].原子与分子物理学报,2016,33(6):1042-1047,6.基金项目
国家自然科学基金(20973001,11074003) （20973001,11074003）
