论文标题
氘分子离子中的超细结构和电四极转变
Hyperfine structure and electric quadrupole transitions in the deuterium molecular ion
论文作者
论文摘要
分子氢离子具有计量学相关性，这是因为对其光谱和外部场诱导的移位进行精确的理论评估。在同核分子离子中，电偶极子$ E1 $过渡受到了强烈抑制，而初级激光光谱兴趣的是电二极管（$ e2 $）的过渡光谱。在继续在H $ _2^+$离子上进行以前的工作时，我们在这里报告了激光诱导的电力四极杆型d $ _2^+$的RO振动状态之间的激光诱导的电二极管过渡的计算结果；先前评估的不准确性已得到纠正。详细研究了激光极化的影响。我们表明，可以通过比较此处介绍的结果与D $ _2^+$的精确光谱的未来数据来确定杜特隆的电动四极矩原则上的电动倍数。
Molecular hydrogen ions are of metrological relevance due to the possibility of precise theoretical evaluation of their spectrum and of external-field-induced shifts. In homonuclear molecular ions the electric dipole $E1$ transitions are strongly suppressed, and of primary laser spectroscopy interest is the electric quadrupole ($E2$) transition spectrum. In continuation of previous work on the H$_2^+$ ion, we report here the results of the calculations of the hyperfine structure of the laser-induced electric quadrupole transitions between a large set of ro-vibrational states of D$_2^+$; the inaccuracies of previous evaluations have been corrected. The effects of the laser polarization are studied in detail. We show that the electric quadrupole moment of the deuteron can in principle be determined with low fractional uncertainty $(\simeq1\times10^{-4})$ by comparing the results presented here with future data from precision spectroscopy of D$_2^+$.
