Far-infrared laser assignments for methylamine
Far-infrared laser assignments for methylamine
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DOI：
10.1007/s10762-007-9309-6
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发表时间：
2008-02-01
期刊：
影响因子：
--
通讯作者：
Xu, Li-Hong
中科院分区：
文献类型：
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作者：
Lees, R. M.;Sun, Zhen-Dong;Xu, Li-Hong
本文报道了用CO_2激光泵浦的CH_3 NH_2的五种不同跃迁系统的远红外激光谱线，通过高分辨率的傅里叶变换红外光谱研究，结合CO_2激光/微波边带宽扫描和兰姆凹陷测量，确定了它们的谱线。根据红外分析和之前对基态振动态的远红外（FIR）结果，对七个甲胺远红外激光跃迁及其与CO2激光线一致的C-N伸缩泵浦吸收进行了量子数分配。通过使用闭合频率组合回路来确认分配，该闭合频率组合回路还提供改进的FIR激光频率以达到光谱精度。
Reported far-infrared laser lines for five different transition systems of CH3NH2 optically pumped by a CO2 laser have been identified spectroscopically through a high-resolution Fourier transform infrared study of the C-N stretching band together with CO2-laser/microwave-sideband broad-scan and Lamb-dip measurements. From the infrared analysis plus previous far-infrared (FIR) results for the ground vibrational state, quantum numbers have been assigned for seven methylamine FIR laser transitions and their C-N stretching pump absorptions coincident with the CO2 laser lines. The assignments are confirmed through the use of closed frequency combination loops that also provide improved FIR laser frequencies to spectroscopic accuracy.