A five-dimensional potential-energy surface for the rotational excitation of SO2 by H2 at low temperatures.
A five-dimensional potential-energy surface for the rotational excitation of SO2 by H2 at low temperatures.
复制标题
低温下 H2 旋转激发 SO2 的五维势能面。
DOI：
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发表时间：
2009
影响因子：
4.4
通讯作者：
N. Feautrier
中科院分区：
文献类型：
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作者：
A. Spielfiedel;M. Senent;F. Dayou;C. Balança;L. Cressiot;A. Faure;Laurent Wiesenfeld;N. Feautrier
SO（2）分子在许多天体中都被发现，特别是在分子云和恒星形成区。观测的精确建模需要非常好地了解与H（2）的碰撞激发速率，因为激发和淬灭SO（2）不同转动能级的碰撞和辐射过程之间存在竞争。本文给出了SO（2）-H（2）的五维刚体相互作用势。作为第一个应用，我们提出了在低温下对-H（2）激发/去激发SO（2）的31个第一能级的速率常数。讨论了倾向性规则。
The SO(2) molecule is detected in a large variety of astronomical objects, notably molecular clouds and star-forming regions. An accurate modeling of the observations needs a very good knowledge of the collisional excitation rates with H(2) because of competition between collisional and radiative processes that excite and quench the different rotational levels of SO(2). We report here a five-dimensional, rigid-body, interaction potential for SO(2)-H(2). As a first application, we present rate constants for excitation/de-excitation of the 31 first levels of SO(2) by para-H(2) at low temperatures. Propensity rules are discussed.