A pulsed field ionization study of the dissociative photoionization reaction CD4+hν→CD3 ++D+e-

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Original languageEnglish
Pages (from-to)51-58
Journal / PublicationChemical Physics Letters
Volume347
Issue number1-3
Publication statusPublished - 19 Oct 2001
Externally publishedYes

Abstract

We have examined the titled dissociation reaction near its 0 K threshold using the pulsed field ionization-photoelectron (PFI-PE) and PFI-PE-photoion coincidence methods. This study yields a value of 14.4184±0.0010 eV for the 0 K threshold. The PFI-PE spectrum for CD4 exhibits a sharp step at the 0 K threshold, indicating that the dissociation of excited CD4 in high-n (n≥100) Rydberg states at energies above the dissociation threshold occurs in ≤10-7 s. The energetic data for CD3/CD3 + and CD4/CD4 + are found to be in excellent agreement with those for CH3/CH3 + and CH4/CH4 + after taking into account the zero-point-vibrational-energy corrections.