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Science 15 September 2006:
Vol. 313. no. 5793, p. 1537
DOI: 10.1126/science.313.5793.1537f
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Figure 1 During the past 30 years, molecular beam techniques have uncovered numerous details of molecular collisions and reactions. A major limitation, however, has been the inherent velocity spread in these beams, which hinders the study of collisions at very low energy. This regime is of interest because of the complexes that can form when weakly attractive forces are not overwhelmed by translational momentum. Gilijamse et al. (p. 1617) use inhomogeneous electric fields to slow down a beam of OH radicals through Stark deceleration, while maintaining a very narrow velocity spread. The rotational-state dependence of OH scattering events with a beam of xenon atoms was determined for a collision-energy range extending below 1 kilocalorie per mole.

CREDIT: GILIJAMSE ET AL.




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