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Science 11 June 1993:
Vol. 260. no. 5114, pp. 1605 - 1610
DOI: 10.1126/science.260.5114.1605
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Articles

Reaction Product Imaging: The H + D2 Reaction

Theofanis N. Kitsopoulos 1, Mark A. Buntine 2, David P. Baldwin 3, Richard N. Zare 4, and David W. Chandler 1

1 Combustion Research Facility, Sandia National Laboratories, Livermore, CA 94551
2 Department of Chemistry, Yale University, New Haven, CT 06511
3 Ames Laboratory, Iowa State University, Ames, IA 50011
4 Department of Chemistry, Stanford University, Stanford, CA 94305

The differential cross section for the H + D2 rarr HD + D reaction has been measured using a technique called reaction product imaging. In this experiment, a photolytically produced beam of hydrogen (H) atoms crossed a beam of cold deuterium (D2) molecules. Product D atoms were ionized at the intersection of the two particle beams and accelerated toward a position-sensitive detector. The ion images appearing on the detector are two-dimensional projections of the three-dimensional velocity distribution of the D atom products. The reaction was studied at nominal center-of-mass collision energies of 0.54 and 1.29 electron volts. At the lower collision energy, the measured differential cross section for D atom production, summed over all final states of the HD(v,J) product, is in good agreement with recent quasi-classical trajectory calculations. At the higher collision energy, the agreement between the theoretical predictions and experimental results is less favorable.


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
Interference of Quantized Transition-State Pathways in the H + D2 -> D + HD Chemical Reaction.
D. Dai, C. C. Wang, S. A. Harich, X. Wang, X. Yang, S. Der Chao, and R. T. Skodje (2003)
Science 300, 1730-1734
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Experimental Studies and Theoretical Predictions for the H + D2 rarr > HD + D Reaction.
L. Schnieder, K. Seekamp-Rahn, J. Borkowski, E. Wrede, K. H. Welge, F. J. Aoiz, L. Baniares, M. J. D'Mello, V. J. Herrero, V. S. Rabanos, et al. (1995)
Science 269, 207-210
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Theory, Experiment, and the H + D2 Reaction.
M. J. D'Mello, D. E. Manolopoulos, and R. E. Wyatt (1994)
Science 263, 102
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