Chemical physics: Molecular clouds, clusters, and corrals

Details Chemical physics: Molecular clouds, clusters, and corrals Chemical physics: Molecular clouds, clusters, and corrals

Mar 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999rvmps..71..411h&link_type=abstract

Reviews of Modern Physics, Volume 71, Issue 2, March 1999, pp.S411-S418

Physics

Atomic and Molecular Clusters

11

Surveys And Tutorial Papers, Resource Letters, Molecular Clouds, H2 Clouds, Dense Clouds, And Dark Clouds, Molecular Clouds, H2 Clouds, Dense Clouds, And Dark Clouds, Optical Cooling Of Atoms, Trapping, Atomic And Molecular Clusters, Mechanical Effects Of Light On Atoms, Molecules, Electrons, And Ions, Atomic And Molecular Beam Sources And Techniques, Ion-Molecule, Ion-Ion, And Charge-Transfer Reactions, Surveys And Tutorial Papers, Resource Letters, Molecular Clouds, H2 Clouds, Dense Clouds, And Dark Cloud

Scientific paper

Vignettes of three frontier areas illustrate the eclectic scope of modern chemical physics. (1) Radioastronomy has revealed a profusion of organic molecules in interstellar clouds, now attributed to sequences of exoergic, bimolecular ion-molecule reactions proceeding far from thermodynamic equilibrium. The organic profusion occurs because He+ ions react far more readily with CO than with the much more abundant H2 molecules. (2) Molecular clusters, generated by supersonic expansions, have become a favorite medium for study of reactions and spectra. Exemplary episodes are the discovery of carbon-60 and kindred fullerene molecules and the observation of sharp rotational spectra of guest molecules in superfluid helium clusters. (3) New means to control molecular trajectories are being developed. These include spatial orientation or alignment by field-induced hybridization of rotational states, corralling (or trapping) molecules after collisional or mechanical quenching of translational kinetic energy, and laser control of photochemical reaction pathways.

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