同位素环氧乙烷$c$ $_2$ H $_4$ O的转动光谱
Rotational spectroscopy of isotopic oxirane, $c$-C$_2$H$_4$O
摘要：
我们研究了在158 GHz和1093 GHz之间的选定区域的天然同位素组成的样品中的环氧乙烷的旋转光谱。研究具有一个$^{13}$ C或一个$^{18}$ O的同位素是主要的重点，以便于在空间中寻找它们。我们还研究了主要的同位素物种，主要是为了研究沃森的A和S减少在扁圆形和扁长形表示的性能。尽管环氧乙烷是一个相当不对称的扁圆转子，但III $^l$表示中的A还原并没有产生令人满意的拟合，这是以前对其他分子经常观察到的。其他三种组合产生了令人满意的拟合相似的质量在彼此之间;在I $^r$表示的A减少需要两个参数小于两个S减少拟合。
英文摘要：
We studied the rotational spectrum of oxirane in a sample of natural isotopic composition in selected regions between 158 GHz and 1093 GHz. Investigations of the isotopologs with one $^{13}$C or one $^{18}$O were the primary focus in order to facilitate searches for them in space. We also examined the main isotopic species mainly to look into the performance of Watson's A and S reductions both in an oblate and in a prolate representation. Even though oxirane is a rather asymmetric oblate rotor, the A reduction in the III$^l$ representation did not yield a satisfactory fit, as was observed frequently earlier for other molecules. The other three combinations yielded satisfactory fits of similar quality among each other; the A reduction in the I$^r$ representation required two parameters less than both S reduction fits.
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