Sm原子奇宇称Rydberg态光谱  

Spectra of Odd-parity Rydberg States of Samarium Atom

作　　者：许照锦[1] 张小虎 张文纳 黄朝宏 沈礼[1] XU Zhao-jin;ZHANG Xiao-hu;ZHANG Wen-na;HUANG Chao-hong;SHEN Li(School of Science, Tianjin University of Technology, Tianjin 300384, China)

机构地区：[1]天津理工大学理学院,天津300384

出　　处：《发光学报》2020年第8期999-1008,共10页Chinese Journal of Luminescence

基　　金：国家自然科学基金(11604243);天津市高等学校创新团队培养计划项目(TD3-5029);国家级大学生创新创业训练计划(201810060026)资助项目。

摘　　要：结合共振激发和场电离探测技术,通过总角动量量子数0→1→0→1的激发路径,研究了第一电离阈附近的Sm原子奇宇称Rydberg态4f66snp(J=1)。首先,在45200~45500 cm^-1能量范围内共发现了94个奇宇称Rydberg能级。其次,通过对有效量子数和Rydberg能级结构特点的分析,将其中68个能级归属为3个束缚Rydberg系列,另外26个能级也给出了能级位置。然后,利用Rydberg-Ritz公式,对3个Rydberg系列分别进行了拟合,获得了Sm原子的电离阈为(45519.61±0.79)cm^-1。最后,采用6种偏振组合激发,由偏振选择定则,进一步验证了这些奇宇称Rydberg态总角动量量子数为1。这些结果首次证实了场电离探测技术对Sm原子高激发Rydberg态的适用性,并且通过对奇宇称Rydberg系列拟合得到的Sm原子电离阈与文献中通过偶宇称Rydberg系列获得的值(45519.64±1.39)cm^-1基本一致。With resonance excitation and field ionization detection technology,the samarium atom odd-parity Rydberg states 4f66snp(J=1)near the first ionization limit were studied via the excitation path of the total angular momentum quantum number 0→1→0→1.Firstly,a total of 94 odd-parity Rydberg levels were found in the energy range of 45200~45500 cm^-1.Secondly,68 of these levels were assigned to three bound Rydberg series through the analysis of effective quantum number and structural characteristics of Rydberg energy levels,and energies of other 26 levels were given.Then,using the Rydberg-Ritz formula,the three series were fitted respectively,and the ionization limit of the samarium atom was(45519.61±0.79)cm^-1.Finally,six kinds of polarization combination were used to excite the samarium atom,and the polarization selection rule further verified that the total angular momentum quantum number of the Rydberg states was 1.The results confirm the applicability of the field ionization detection technology to the highly excited Rydberg states of the samarium atom.Meanwhile,ionization limit of the samarium atom obtained by fitting from the odd-parity Rydberg series is corresponded to the value(45519.64±1.39)cm^-1 obtained by fitting from the even-parity Rydberg series from the reference.

关 键 词：Sm原子 奇宇称 RYDBERG态 场电离 偏振光谱 

分 类 号：O433.1[机械工程—光学工程] O433.2[理学—光学]