Dimethyl Ether: Laboratory Assignments and Predictions through 600 GHz
Dimethyl Ether: Laboratory Assignments and Predictions through 600 GHz
复制标题
二甲醚：600 GHz 范围内的实验室分配和预测
DOI：
--
复制
发表时间：
1998
期刊：
影响因子：
--
通讯作者：
F. D. De Lucia
中科院分区：
文献类型：
--
作者：
P. Groner;S. Albert;E. Herbst;F. D. De Lucia
二甲醚（CH3OCH3）是一种众所周知的星际分子，在热核心区具有很大的丰度。我们使用两种实验技术测量了该分子在100-550 GHz频率范围内的许多旋转-扭转过渡线：基于速调管的传统毫米波光谱仪和带有电压可调后向波振荡器的新型快速扫描光谱仪（称为“FASSST”）。由地面振动状态产生的线与以前的数据（主要是在较低频率）相结合，形成一个由1600多条线组成的全球数据集，这些线已通过有效的哈密顿方法进行分配和拟合。从拟合得到的光谱常数使我们能够在600 GHz范围内预测近6000条二甲醚附加谱线的频率。
Dimethyl ether (CH3OCH3) is a well-known interstellar molecule with a large abundance in hot core regions. We have measured many rotational-torsional transition lines of this molecule in the 100-550 GHz frequency range using two experimental techniques: a klystron-based traditional millimeter-wave spectrometer and a new fast scan spectrometer (designated "FASSST") with a voltage-tunable backward wave oscillator. The lines arising from the ground vibrational state have been combined with previous data, mainly at lower frequencies, to form a global data set consisting of over 1600 lines that have been assigned and fitted by an effective Hamiltonian method. The spectral constants obtained from the fit allow us to predict the frequencies of almost 6000 additional lines of dimethyl ether through 600 GHz.