We describe a time-of-flight apparatus that uses core extraction to determine nascent product laboratory velocity distributions from which differential cross sections may be deduced. We emphasize the characterization of the instrument, the reaction conditions, and the calibration procedure. For this purpose, we have measured H-atom velocity distributions from HBr photolysis, as well as the velocity distribution arising from the reaction under quasi-monoenergetic collision conditions at 1.9 eV. Collisional energy spread and reagent internal state distributions were determined from the rotational and translational temperatures of the HBr photolytic precursor and the diatomic reagent. The differential cross section for at is presented and found to peak near with an approximate full width at half maximum (FWHM) of 40°.
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15 July 1999
Research Article|
July 15 1999
Measurement of the product differential cross section for the exchange reaction at using the photoloc technique Available to Purchase
Félix Fernández-Alonso;
Félix Fernández-Alonso
Department of Chemistry, Stanford University, Stanford, California 94305
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Brian D. Bean;
Brian D. Bean
Department of Chemistry, Stanford University, Stanford, California 94305
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Richard N. Zare
Richard N. Zare
Department of Chemistry, Stanford University, Stanford, California 94305
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Félix Fernández-Alonso
Department of Chemistry, Stanford University, Stanford, California 94305
Brian D. Bean
Department of Chemistry, Stanford University, Stanford, California 94305
Richard N. Zare
Department of Chemistry, Stanford University, Stanford, California 94305
J. Chem. Phys. 111, 1022–1034 (1999)
Article history
Received:
January 19 1999
Accepted:
March 30 1999
Connected Content
A companion article has been published:
Differential cross sections for at 1.7 eV
Citation
Félix Fernández-Alonso, Brian D. Bean, Richard N. Zare; Measurement of the product differential cross section for the exchange reaction at using the photoloc technique. J. Chem. Phys. 15 July 1999; 111 (3): 1022–1034. https://doi.org/10.1063/1.479294
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