Rotational-State Dependence of the Collisional Pumping Rate for Astrophysical Masers

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概要

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• We study rotational-vibrational pumping and rotational-vibronic pumping by nonreactive collisions. The maser molecules are assumed to be linear, symmetric-top or asymmetric-top rotators. We apply the energy-sudden approximation with respect to the rotational motion. The rates for pumping to various different rotational states are expressible in a simple form; it includes the rotational energy and a small number of overall collision rate constants rather than the set of the individual rotational-vibrational (rotational-vibronic) rate constants. For pumping to low-lying rotational states Γ' the rates prove to be independent of Γ'. This agrees with a result obtained by Watson et al. for the special case of rotational-vibrational pumping of a linear rotator. We discuss validity of the energy-sudden approximation and modifications that are necessary for purely rotational pumping of a dipolar molecule by a charged particle.

• 理論物理学刊行会の論文
• 1982-07-25

著者

• Shimamura Isao

  The Institute Of Space And Astronautical Science

• SHIMAMURA Isao

  The Institute of Physical and Chemical Research

関連論文

• Intramolecular Nuclear Fusion in Hydrogen-Isotope Molecules : Atomic and Statistical Physics
• Rotational-State Dependence of the Collisional Pumping Rate for Astrophysical Masers

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