The paper discusses calculations of vibrational energy levels for radioactive oxygen isotopologues of water vapor H2XO (where X=11,...,26). A full range of possible water vapor oxygen isotopologues considered. The vibrational levels were calculated in two ways: using the DVR3D variational nuclear motion program and the isotope substitution technique were used. Vibrational energy levels for H2 11O, H2 12O, H2 13O, H2 14O, H2 15O, H2 16O, H2 17O, H2 18O, H2 19O, H2 20O, H2 21O, H2 22O, H2 23O, H2 24O, H2 25O и H2 26O are presented.
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