Laboratory measurements of ion-molecule reactions pertaining to interstellar hydrocarbon synthesis
Laboratory measurements of ion-molecule reactions pertaining to interstellar hydrocarbon synthesis
复制标题
与星际碳氢化合物合成有关的离子分子反应的实验室测量
DOI：
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发表时间：
1983
期刊：
影响因子：
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通讯作者：
David Smith
中科院分区：
文献类型：
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作者：
E. Herbst;N. Adams;David Smith
对氦存在下烃类离子与氢分子的各种三体缔合反应进行了测量。即使在80 K下，所研究的大多数体系的速率系数也非常小（<1 × 10/sup-30/ cm/sup 6/ s/sup-1/）。这些结果对最近提出的致密星际云中复杂碳氢化合物形成的气相模型提出了严重质疑，其中碳氢化合物离子和分子氢之间的辐射缔合反应起着关键作用。除三体反应外，还研究了碳氢离子与氢分子的二体反应和碳离子（C/sup +/）与碳氢中性分子的反应。
Measurements on a variety of three-body association reactions between hydrocarbon ions and molecular hydrogen in the presence of helium have been undertaken. The rate coefficients of most of the systems studied are vanishingly small (<1 x 10/sup -30/ cm/sup 6/ s/sup -1/) even at 80 K. The results cast severe doubt on a recent gas-phase model of complex hydrocarbon formation in dense interstellar clouds in which radiative association reactions between hydrocarbon ions and molecular hydrogen play a key role. In addition to the three-body reactions, some two-body reactions between hydrocarbon ions and molecular hydrogen and some reactions between carbon ions (C/sup +/) and hydrocarbon neutrals have been studied.