Abstract
Differential cross sections for rotational transitions in D2CO induced by collisions with H2 are measured at a collision energy of 17 meV. The 110 state of D2CO is prepared with high state purity by a combination of rotational cooling in a seeded beam expansion and electrostatic state selection. The final state after scattering is probed as a function of the scattering angle by laser-induced fluorescence detection with excitation at 325 nm. The first results with the final states 110, 111, 211, and 212 are presented. The differential cross section for the ΔJ=1 transition 110→211 displays a relatively large contribution at large angles compared to the cross sections for the other transitions.
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