Kr原子偶宇称4p^5(~2P_(1/2))nl′[K′]J(l′=1,3)自电离态共振增强激发光谱线形研究

Line-profile analysis of excitation spectroscopy in the even 4p^5(~2P_(1/2))nl′[K′]J(l′=1,3) autoionizing resonances of Kr

在单光子29000~40000 cm 1能量范围内,获得亚稳态4p55s[3/2]2和4p55s′[1/2]0Kr原子向其4p5np′[3/2]1,2,[1/2]1和4p5nf′[5/2]3序列自电离Rydberg态跃迁的共振增强激发光谱,光谱线宽≈0.1 cm 1.这些偶宇称自电离态的激发谱呈现明显的不对称线形,如此高分辨的激发谱大部分是首次报道.根据Fano线形关系对激发谱进行系统地分析,获得许多新的系统的能级位置、量子亏损、线性因子、共振宽度、共振态寿命和衰减宽度等数据,基于实验拟合所得的系统参数,我们发现线形因子和共振宽度相对有效量子数呈线性关系.另外还分析了4p5np′序列的能级间距.

The even-parity autoionizing resonance series 4pSnp＇ [3/211,2, [1/2]1, and 4pSnf＇ [5/2]3 of krytpon were investigated exciting from the two metastable states 4p55s [3/2]2 and 4p55s＇ [1/2]0 in the photon energy range of 29000-40000 cm^-1 at experimental bandwidth of -0.1 cm-1. The excitation spectra of the even-parity autoionizing resonance series showed typical asymmetric line shapes, most of which had never been observed previously. A wealth of new and systematic level energies, quantum defects, line profile indices and resonance widths, resonance lifetimes and reduced widths of the autoionizing resonances were derived by a Fano-type line-shape analysis. Based on the systematic experimental parameters, we found that the line profile index （q） and the resonance width （/-） were shown to be approximately proportional to the effective principal quantum number （n＊）. Furthermore, the line separation of the 4pSnp＇ autoionizing resonances was discussed, and the experimental data were consistent with the theoretical ones.