Collisional excitation of interstellar cyclopropenylidene |
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| Authors: | Green S DeFrees D J McLean A D |
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| Institution: | NASA/Goddard Space Flight Center, Institute for Space Studies, New York, USA. |
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| Abstract: | Theoretical rotational excitation rates were computed for C3H2 in collisions with He atoms at temperatures from 30 to 120 K. The intermolecular forces were obtained from accurate self-consistent field and perturbation theory calculations, and collision dynamics were treated within the infinite-order sudden approximation. The accuracy of the latter was examined by comparing with the more exact coupled states approximation. |
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