A calculated infrared vibration–rotation spectrum of isotopically modified water, H₂¹⁵O, is presented. Oxygen-15 has a half-life of about 2 minutes and H₂¹⁵O may be formed in the atmosphere during thunderstorms as a result of photonuclear processes or when the atmosphere is irradiated by cosmic γ-rays. Variational nuclear motion calculations of vibrational and vibrational-rotational levels up to 25000 cm⁻¹ and up to J = 10 in angular momentum are performed within the framework of the Born-Oppenheimer approximation using an accurate water potential function. The line shape parameters for H₂¹⁵O are estimated. Spectral ranges that are promising for the detection of H₂¹⁵O in the atmosphere are identified and a search for spectral signatures conducted. A spectral feature is tentatively assigned to the 7₅₂ (0 1 0) - 6₄₃ (0 0 0) line of H₂¹⁵O.

给出了同位素改性水 H ₂ ¹⁵ O的计算红外振动-旋转光谱。Oxygen-15 的半衰期约为 2 分钟，而在雷暴期间，由于光核过程或当大气受到宇宙 γ 射线照射时，大气中可能会形成H ₂ ¹⁵ O。 使用精确的水势函数在 Born-Oppenheimer 近似的框架内执行高达 25000 cm ^-1和高达J = 10的振动和振动-旋转水平的变分核运动计算。H ₂ ¹⁵的线形参数O 估计。确定了有希望检测大气中H ₂ ¹⁵ O 的光谱范围，并进行了光谱特征搜索。光谱特征暂时分配给H ₂ ¹⁵ O的 7 ₅₂ (0 1 0) - 6 ₄₃ (0 0 0) 线。