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Home > Publication > A guided-ion beam study of the O+(4S) + NH3 system at hyperthermal energies.

A guided-ion beam study of the O+(4S) + NH3 system at hyperthermal energies.

Levandier DJ1, Chiu YH, Dressler RA.

J Phys Chem A. 2008 Oct 2;112(39):9601-6. doi: 10.1021/jp803120z. Epub 2008 Sep 5.

We have measured absolute cross section for the reaction of ground-state O(+) with ammonia at collision energies in the range from near-thermal to approximately 15 eV, using the guided-ion beam (GIB) method. Measurements were also performed using ammonia-d3 to aid in mass assignments. The reaction is dominated at low collision energies by charge transfer; however, the cross section for this exothermic channel is rather small, decreasing sharply with energy from approximately 40 A(2) for normal ammonia at near-thermal energies and leveling off at 3.7 A(2) above 6 eV; the cross section is slightly smaller for ammonia-d3. Other channels, corresponding to the production of NH2(+) and NO(+), and possibly OH(+), were detected. The NO(+) channel, although nominally exothermic, is very small and exhibits a threshold at approximately 7 eV. Product recoil velocity distributions were also determined at selected collision energies, using GIB time-of-flight methods.

Chemicals Related in the Paper:

Catalog Number Product Name Structure CAS Number Price
ACM13550497 Ammonia-d3 Ammonia-d3 13550-49-7 Price

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Tel:1-201-478-8534
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Address: 2200 Smithtown Avenue, Room 1 Ronkonkoma, NY 11779-7329 USA