Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 1974
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1974apj...194l..97k&link_type=abstract
Astrophysical Journal, vol. 194, Dec. 1, 1974, pt. 2, p. L97-L101.
Astronomy and Astrophysics
Astrophysics
80
Interstellar Gas, Masers, Molecular Excitation, Population Inversion, Silicon Oxides, Trapped Particles, Astronomical Models, Electron Transitions, Infrared Stars, Molecular Energy Levels, Molecular Rotation, Pumping
Scientific paper
Radiative trapping in the v = 0 to 1 vibrational transitions decreases the rate of de-excitation of a v = 1 level as its rotational quantum number increases. This effect readily leads to population inversions of the v = 1 rotational transitions if population is transferred from v = 0 into v = 1 by collisions or by an indirect radiative route, as for example, through absorptions from v = 0 into v = 2 and the subsequent spontaneous cascade from v = 2 to v = 1.
Kwan Juliana
Scoville Nick
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