标题： D2的Lyman和Werner带的真空紫外傅里叶变换吸收研究 显示英文标题

标题： VUV Fourier-transform absorption study of the Lyman and Werner bands in D2

摘要： 对D2吸收光谱进行了广泛的调查，使用了SOLEIL同步辐射光源的DESIRS光束线的高分辨率真空紫外傅里叶变换光谱仪。 90 000-119 000 cm-1的频率范围覆盖了B 1{\Sigma }+u、B' 1{\Sigma }+u和C 1{\Pi }u电子态势阱的完整深度，直到D(1s) + D(2\ell )解离极限。 确定了转动振动态能级的改进能量值，分别达到v = 51、v = 13和v = 20。 通过在分子气体喷嘴中以狭缝几何结构探测吸收，以及在液氦冷却的静态气体池中探测吸收，实现了最高分辨率，导致线宽约为0.35 cm-1。 采用扩展的校准方法，以绝对精度0.03 cm-1提取D2线的线位置。 D1{\Pi }u和B" 1{\Sigma }+u电子态与D(1s) + D(3\ell )解离极限相关，但分别在第二个解离极限以下支持少量振动态，分别为v = 0-3和v = 0-1，并且也包含在本研究中。 所得出的完整能级集合是D2最全面和准确的数据集。 观察结果与以前的研究进行了比较，包括实验和理论研究。 显示英文摘要

摘要： An extensive survey of the D2 absorption spectrum has been performed with the high-resolution VUV Fourier-transform spectrometer of the DESIRS beamline at the SOLEIL synchrotron. The frequency range of 90 000-119 000 cm-1 covers the full depth of the potential wells of the B 1{\Sigma}+u, B' 1{\Sigma}+u, and C 1{\Pi}u electronic states up to the D(1s) + D(2\ell) dissociation limit. Improved level energies of rovibrational levels have been determined up to respectively v = 51, v = 13, and v = 20. Highest resolution is achieved by probing absorption in a molecular gas jet with slit geometry, as well as in a liquid helium cooled static gas cell, resulting in line widths of ~0.35 cm-1. Extended calibration methods are employed to extract line positions of D2 lines at absolute accuracies of 0.03 cm-1. The D1{\Pi}u and B" 1{\Sigma}+u electronic states correlate with the D(1s) + D(3\ell) dissociation limit, but support a few vibrational levels below the second dissociation limit, respectively v = 0-3 and v = 0-1, and are also included in the presented study. The complete set of resulting level energies is the most comprehensive and accurate data set for D2. The observations are compared with previous studies, both experimental and theoretical.