The potential-energy and quadrupole-moment functions of the H${}_2$ ground electronic state are well known in literature (Komasa et al., 2019; Wolniewicz et al., 1998), and the line list of the vibrational–rotational transitions was calculated (Roueff et al., 2019). In this paper, we analyze the calculated intensities in order to learn how the intensities will change when analytic quadrupole-moment functions fitted to the ab initio and experimental data are used instead of spline-interpolated functions. We found that the use of splines does not deteriorate the intensities and does not lead to nonphysical saturation, as in heavier molecules, owing to the high precision of the ab initio data and the high density of the grid. The accuracy of the calculated intensities is estimated up to high overtones. Extraction of new spectroscopic information from the observational data that supplements the laboratory measurements is performed. The laboratory and observational data do not help increase the quality of the analytic functions. Numerous anomalies resulting from the destructive interference are identified in the calculated line lists, some of them being situated within the recently observed spectral regions, 1.5–$2.5\mathrm{\mu }\mathrm{m}$. The intensities of these anomalies can be sensitive to the form of the molecular functions as well as to the proton-to-electron mass ratio. In this connection, the similar Le Roy anomalies (Brown and LeRoy, 1973; Le Roy and Vrscay, 1975) also arising due to the destructive interference in the Lyman and Werner systems are discussed.

H基电子态的势能和四极矩函数在文献中众所周知（Komasa et al., 2019; Wolniewicz et al., 1998），并且计算了振动-旋转跃迁的线列表（Roueff等人，2019）。在本文中，我们分析了计算的强度，以了解当使用从头开始拟合的解析四极矩函数和实验数据而不是样条插值函数时，强度将如何变化。我们发现，由于从头计算数据的高精度和网格的高密度，样条的使用不会降低强度，也不会导致非物理饱和，如在较重的分子中。计算强度的准确性被估计到高泛音。从观测数据中提取新的光谱信息来补充实验室测量。实验室和观察数据无助于提高分析功能的质量。在计算的谱线列表中发现了由相消干涉引起的许多异常，其中一些异常位于最近观察到的光谱区域 1.5– $2.5\mathrm{\mu }\mathrm{m}$ 内。这些异常的强度可能对分子函数的形式以及质子与电子的质量比敏感。在这方面，讨论了由于莱曼和维尔纳系统中的相消干涉而产生的类似勒罗伊异常（Brown和LeRoy，1973；Le Roy和Vrscay，1975）。