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A study of isotope effects in the reaction O+ + H2O/D2O → OH+/OD+ + OH/OD using guided-ion beams

✍ Scribed by Dale J. Levandier; Rainer A. Dressler; Edmond Murad

Publisher
Elsevier Science
Year
1996
Tongue
English
Weight
550 KB
Volume
251
Category
Article
ISSN
0009-2614

No coin nor oath required. For personal study only.

✦ Synopsis

Guided-ion beam methods were used to measure the absolute cross sections for OH+/OD + derived from O + and H20/D20 collisions over the range of 0.25-20 eV relative energy. The cross sections for the isotopic homologues have the same form, a bimodal behavior that appears to be related to the thermochemical thresholds for two reaction channels that give rise to OH+/OD +. The analysis of time-of-flight (TOF) measurements, based on the osculating complex model, is compared to phase-space theory calculations. The results indicate that the low-energy channel involves atom transfer via an orbiting complex.

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