Dissociation threshold of H218O: Validating ab initio calculations by state-selective triple-resonance spectroscopy

We employ state-selective triple-resonance vibrational overtone spectroscopy for a direct measurement of the lowest dissociation energy, Do, in the (H2O)-O-18 molecule. The measured value of 41 154.22 +/- 0.25 cm(-1) is in an excellent agreement with that, predicted by ab initio theoretical calculations. This result validates the computations, adding more confidence to what this theory can predict for water. In addition, we have measured the required for this experiment energy levels of (H2O)-O-18 in the region near 27 000 cm(-1), as well as the laser-induced fluorescence (LIF) spectrum of the (OH)-O-18 isotopologue, for which near 60 electronic transitions have been assigned. (C) 2015 Elsevier B.V. All rights reserved.


Published in:
Chemical Physics Letters, 627, 73-76
Year:
2015
Publisher:
Amsterdam, Elsevier
ISSN:
0009-2614
Laboratories:


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 Record created 2015-04-28, last modified 2018-03-17

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