Laser analysis of the relative content of ortho- and para-water molecules for the diagnostics of spin-selective processes in gaseous media

The physical principles of laser spectral analysis of the relative content of ortho- and para-water molecules, which is aimed at studying the spin-selective processes in gaseous media, are considered. An analyzer of the content of water spin isomers is described. It is based on a tunable diode laser and implies high-precision measurement of the near-IR absorption in vibrational-rotational lines of the H 2 O molecule. The efficiency of the diagnostic method developed is demonstrated in the diagnostics of spin-selective adsorption in nanoporous polymer sorbents. There was confirmed the existence of the effects of spin-selective adsorption of ortho- and para-water molecules, which had been previously observed by only submillimeter spectroscopy.