Direct Measurement of Rotationally Inelastic Cross Sections at Astrophysical and Quantum Collisional Temperatures

Details Direct Measurement of Rotationally Inelastic Cross Sections at Astrophysical and Quantum Collisional Temperatures Direct Measurement of Rotationally Inelastic Cross Sections at Astrophysical and Quantum Collisional Temperatures

Jul 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998phrvl..81..305b&link_type=abstract

Physical Review Letters, Volume 81, Issue 2, July 13, 1998, pp.305-308

Statistics

Methodology

14

Scientific paper

The first measurements of rotationally inelastic collision cross sections over the 1-40 K temperature range characteristic of much of the interstellar medium are reported. Measurements of the 11,0-10,1 transition of H2S in collision with He are based on a collisional cooling methodology, which allows the direct observation of collision processes at temperatures far below the limits ordinarily imposed by vapor pressure. These cross sections are also of fundamental interest because resonant formation of quasibound complexes mediates rotational energy transfer at low collision energy.

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