Semiclassical treatment of atom‐asymmetric rotor collisions; rotational excitation of formaldehyde at low energies
摘要:
The formalism necessary for the application of ``classicalS‐matrix'' theory to collisions of an atom with a rigid asymmetric rotor is derived. This is applied to rotational excitation of formaldehyde by H2(taken to be spherically symmetric) at energies from 10 to 15°K. Classical Monte Carlo trajectory calculations were also carried out for the same system in the energy range 10–40°K. The results support the proposal of Townes and Cheung that a collisional mechanism is responsible for the 111→110anomalous absorption of formaldehyde in cool interstellar dust clouds.
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DOI:
10.1063/1.1682471
被引量:
年份:
1974
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