Abstract:
It has been found that molecules (e.g., SF6, CF3I) excited in a molecualr beam by intense infrared laser radiation into high vibrational states (with energy Ev ≥ 0.5–2.0 eV) pass through a multichannel metal plate, which is cooled to Ts ≅ 80–85 K and inclined to the beam axis, much more efficiently than unexcited (vibrationally cold) molecules. This property provides the possibility of separating excited and unexcited molecules in the beam. The method is described and the first experimental results are reported.