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Science 9 May 2003:
Vol. 300. no. 5621, pp. 966 - 969
DOI: 10.1126/science.1083672
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Reports

State-Specific Correlation of Coincident Product Pairs in the F + CD4 Reaction

Jim J. Lin,1 Jingang Zhou,1 Weicheng Shiu,1 Kopin Liu1,2*

When a chemical reaction forms two molecular products, even if the state-resolved differential cross section (DCS) for each product is obtained individually, the coincident attributes of the coproducts are still lacking. We exploit a method that provides coincidence information by measuring the state-resolved, pair-correlated DCS. Exemplified by the reaction F + CD4 -> DF + CD3, a time-sliced ion velocity imaging technique was used to measure the velocity distribution of a state-selected CD3 product and to reveal the information of the coincident DF in a state-correlated manner. The correlation of different product state pairs shows a striking difference, which opens up a new way to unravel the complexity of a polyatomic reaction.

1 Institute of Atomic and Molecular Sciences, Academia Sinica, Post Office Box 23-166, Taipei, Taiwan 106.
2 Department of Chemistry, National Taiwan University, Taipei, Taiwan 106.

* To whom correspondence should be addressed. E-mail: kpliu{at}gate.sinica.edu.tw

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