Journal of Quantitative Spectroscopy and Radiative Transfer ( IF 2.3 ) Pub Date : 2021-02-01 , DOI: 10.1016/j.jqsrt.2021.107549 Yoshihiro Iwata , Masabumi Miyabe , Shuichi Hasegawa
Three-step resonance excitation to autoionization states is a promising isotope-selective ionization technique for atomic strontium (Sr). We measured for the first time the DC Stark shifts of ten Rydberg levels ( ) of Sr converging to the 4d D limit using the 5sS 5s5p P 5pD (4d D Rydberg series) transition pathway. The polarizability of each level was evaluated to be [CmJ] depending on the effective principal quantum number which indicates that the external electric field in the ionization region should be of the order of 0.1 V/cm or less to suppress its effect on the observed spectra. Our experimental data on the DC Stark shift and polarizability of the Rydberg levels are useful for future isotope-selective detection of the radioisotope Sr using three-step resonance excitation.
中文翻译:
锶选择性电离态锶选择性电离态的直流斯塔克位移研究
三步共振激发到自电离态是一种用于原子锶(Sr)的有前途的同位素选择性电离技术。我们首次测量了十个里德伯格水平的直流斯塔克频移( ) 的 融合至4d的sr d 限制使用5秒小号 5秒5秒 P 5pd (4天 dRydberg系列)过渡途径。极化率 每个级别的评估为 [C米Ĵ]取决于有效的主量子数 表示外部电场 在电离区域中的“α”应约为0.1 V / cm或更小,以抑制其对观察到的光谱的影响。我们关于Rydberg能级的DC Stark位移和极化率的实验数据对于放射性同位素的未来同位素选择性检测很有用锶采用三步共振激发。