Threshold ion-pair production spectroscopy (TIPPS) has been applied to two isotopomers, HF and DF. From the high resolution TIPP spectra, the ion-pair thresholds of have been precisely measured. Combined with the ionization energy of H(D), the electron affinity of F, and the zero point energies of , the difference between their classical bond dissociation energies was obtained as . Our result provides an experimental estimate of the Born-Oppenheimer breakdown in the ground electronic state. The present work also measured the total ion-pair yield spectra of HF and DF in the threshold region, and the ion-pair formation mechanisms of these two molecules were discussed in light of the high resolution results.
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Research Article| February 17 2006
Energetics and dynamics of threshold photoion-pair formation in
Q. J. Hu;
Q. J. Hu, J. W. Hepburn; Energetics and dynamics of threshold photoion-pair formation in . J. Chem. Phys. 21 February 2006; 124 (7): 074311. https://doi.org/10.1063/1.2172606
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