trans-Ethyl Methyl Ether: Assignments and Predictions up to 400 GHz for the Vibrational-Torsional Ground State
trans-Ethyl Methyl Ether: Assignments and Predictions up to 400 GHz for the Vibrational-Torsional Ground State
复制标题
反式乙基甲基醚：高达 400 GHz 的振动扭转基态的分配和预测
DOI：
10.1086/345100
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发表时间：
2003
期刊：
影响因子：
--
通讯作者：
E. Herbst
中科院分区：
文献类型：
--
作者：
U. Fuchs;G. Winnewisser;P. Groner;F. D. De Lucia;E. Herbst
乙基甲基醚（C2H5OCH3）已在热核中初步检测到，热核是与大质量恒星形成区域相关的静态高密度源。到目前为止，该分子唯一发表的实验室旋转-扭转跃迁位于35 GHz以下的频率。在本文中，我们报道了在350 GHz频率范围内，乙基甲基醚在其振动-扭转基态中的许多旋转-扭转跃迁的测量和分配。对超过1000个新的和先前分配的过渡的实验精度的拟合使我们能够预测高达400 GHz的许多其他过渡的频率。这项工作的结果将使天文学家能够确认在星际源中存在乙基甲基醚。
Ethyl methyl ether (C2H5OCH3) has been tentatively detected in hot cores, which are quiescent high-density sources associated with regions of high-mass star formation. Up to now, the only published laboratory rotational-torsional transitions for this molecule lie at frequencies under 35 GHz. In this paper, we report the measurement and assignment of many rotational-torsional transitions of ethyl methyl ether in its vibrational-torsional ground state at frequencies through 350 GHz. A fit to experimental accuracy of over 1000 new and previously assigned transitions has allowed us to predict the frequencies of many additional transitions up to 400 GHz. The results of this work should enable astronomers to confirm the existence of ethyl methyl ether in interstellar sources.