TY CONF TI ESTIMATION OF DETECTION POSSIBILITY OF TRITIUM ISOTOPOLOGUE T218O CONTENT IN WATER VAPOR BY SPECTROSCOPIC METHODS KW radioactive isotopologues of water vapor KW tritium KW heavy water JO International Symposium Atmospheric and Ocean Optics. Atmospheric Physics AU Chencov, A.V. AU Chesnokova, T.Y. AU Kolotkov, G.A. AU Voronin, B.A. AU Voronina, Y.V. PY 2026 PB V.E. Zuev Institute of Atmospheric Optics, Siberian Branch of the Russian Academy of Sciences