The experimental determination of vibrational transition moments for HF dimer

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Abstract
The vibrational transition moments for the proton acceptor and proton donor HF stretches in (HF)2 have been measured by vibrational predissociation spectroscopy under saturated conditions in a molecular beam using mass spectrometric detection. The proton acceptor transition moment shows only slight enhancement (approximately 10%) over the HF monomer value of 0.0997 D. The proton donor transition moment is substantially enhanced by a factor of approximately 2, as a result of hydrogen bonding. The enhancements are in excellent agreement with predictions from ab initio calculations.

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