We report ab initio calculations of generalized spectroscopic cross-sections for hydrogen deuteride perturbed by helium. From these calculations, collisional line-shape parameters are deduced for the HD electric dipole transitions: from R(0) to R(5) and from P(1) to P(6) in the 0–0 to 5–0 bands. These parameters are necessary for a proper interpretation of HD spectra from the atmospheres of gas giants. We demonstrate that the centrifugal distortion cannot be ignored, not only for pure rotational lines but also for rovibrational lines when one aims at sub–percent accuracy of the collisional line–shape parameters.

中文翻译：

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He对HD振动偶极线的碰撞线形参数和广义光谱截面的从头计算。

我们报告了从头算计算的氘受氢干扰的氘化氢的广义光谱截面。从这些计算中，得出了HD电偶极跃迁的碰撞线形参数：0-0至5-0频带中从R（0）到R（5）和从P（1）到P（6）。这些参数对于正确解释天然气巨人大气中的高清光谱是必不可少的。我们证明了离心变形不仅对于纯旋转线而且对于旋转振动线也不能忽略，因为它的目标是碰撞线形参数的精度低于百分之一。