Abstract
A simple and natural source of cold and aligned molecules involves the use of molecular beams seeded with lighter carrier gases: collisions occurring during the supersonic expansion can produce molecules in their lowest rotovibrational states with specific alignment of the rotational angular momentum [1]. Our recent progress on understanding this phenomenon, whose mechanism is qualitatively depicted in Fig. 1, is discussed in this paper. Collisional alignment is by itself an important issue of gas dynamics: after providing the proper background by analyzing the relevant experimental information (section 2), in this paper we present a discussion of the gas dynamics in terms of extensive quantum mechanical calculations of scattering cross sections (section 3) and outline recent applications to scattering experiments providing information on intermolecular forces (section 4).
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Aquilanti, V., Ascenzi, D., Cappelletti, D., de Castro, M., Pirani, F. (2001). Natural Alignment and Cooling in Seeded Supersonic Free Jets: Experiments and a Quantum Mechanical View. In: Campargue, R. (eds) Atomic and Molecular Beams. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-56800-8_17
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DOI: https://doi.org/10.1007/978-3-642-56800-8_17
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