Rotationally resolved infrared spectra of helium solvated methyl fluoride in the C−H and C−F stretching bands reveal peaks with linewidths that span several orders of magnitude. Stark spectroscopy probes the dependence of rotational linewidth on field strength, to see if it is affected by the reduced gap between the rotational energy of methyl fluoride and the roton-gap of superfluid helium.

中文翻译：

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4He 纳米液滴中甲基氟化物的红外激光斯塔克光谱

氦溶剂化氟化甲烷在 C−H 和 C−F 伸缩带中的旋转分辨红外光谱显示线宽跨越几个数量级的峰。斯塔克光谱探测旋转线宽对场强的依赖性，看看它是否受到氟化甲烷旋转能与超流氦旋转能隙之间间隙减小的影响。