Electronic Resource
College Park, Md.
:
American Institute of Physics (AIP)
The Journal of Chemical Physics
108 (1998), S. 1601-1609
ISSN:
1089-7690
Source:
AIP Digital Archive
Topics:
Physics
,
Chemistry and Pharmacology
Notes:
Product HD kinetic energy distributions are reported for the incident gas phase H atom abstraction of D adsorbed on a monodeuteride-terminated Si(100) surface. The H atoms are generated by laser photolysis of HI and have well-defined kinetic energies in the range of 1–3 eV. For an incident H atom average kinetic energy of 〈EH〉=1.1 eV, the HD product kinetic energy distribution has a mean value of 〈EHD〉=1.2–1.3 eV and extends up to the nominal available-energy limit, providing dynamical evidence for a direct Eley–Rideal mechanism for this abstraction reaction. For 〈EH〉=1.5 and 3.2 eV, the HD product kinetic energy distribution broadens relative to that for 〈EH〉=1.1 eV while 〈EHD〉 remains unchanged, suggesting that energy loss to the substrate becomes more significant and the reaction becomes less Eley–Rideal-like for these higher energies. The results are compared with recent classical trajectory calculations. © 1998 American Institute of Physics.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.475530
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