Conversion of water nuclear-spin isomers by the quantum relaxation phenomenon is revisited and the high stability of water isomers is predicted. As an example, the isomer lifetime is found equal to 18 hours at room temperature and the water vapor pressure equal to $\simeq 5$ torr. Our calculations correct the prediction of rather short lifetime of water spin isomers, $\approx 1$ s, made by Cacciani et al. [Phys. Rev. A 85, 012521 (2012)].

中文翻译：

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重访H2O中的核自旋转换

重新审视了量子弛豫现象对水核自旋异构体的转化，并预测了水异构体的高稳定性。例如，发现异构体寿命在室温下等于 18 小时，水蒸气压等于$\simeq 5$托。我们的计算纠正了水自旋异构体寿命相当短的预测，$\approx 1$ s，由 Cacciani等人制作。[物理。修订版 A 85 , 012521 (2012)]。