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LMR spectra for v=1←0 transitions of 14N16O in X2Π1/2,3/2 states were observed at 5.6 μm and 5.4 μm of CO laser. Introducing the advanced isotopic molecular constant scaling function to Hund's case (a) diatomic structure model, these spectra were analyzed and fitted together with all reliable previous spectral data of 14N16O as well as 14N17O and 14N18O. A full set of precise molecular parameters and their vibrational dependencies have been determined with much higher precision (1 -2 orders for most parameters). Many of them have been obtained for the first time. Using isotopic scaling function, the molecular constants of 14N17O and 14N18O were deduced. 相似文献
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文章报道与英国剑桥大学合作建立的新型可调远红外激光光谱仪的技术特点和工作原理。该光谱仪利用二极管的非线性特性 ,将CO2 激光泵浦产生的远红外激光与微波进行混频 ,得到边带远红外激光辐射 ,调节微波频率来实现边带远红外激光的扫描。利用该谱仪观测了CHF3 振动基态J =34~ 33,K =0 ~15和SO2 基态的 194,16~ 183 ,15,382 ,3 6~ 373 ,3 5纯转动光谱 ,并对它们进行了标识。 相似文献
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激光大气等离子体光谱特性实验研究 总被引:19,自引:5,他引:14
报道了对波长为1.06μm的脉冲激光在气体样品中产生的等离子体进行光谱研究的结果。气体样品为一个标准大气压的纯氮、纯氧和空气,光谱探测范围为300~900nm。结果表明,各种气体样品的激光等离子体光谱均表现为连续谱和线状谱的叠加,文中分别给出了连续谱和线状谱的基本特征,讨论了这些特征与等离子体物理特性的关系,并分析了纯氮、纯氧与空气激光等离子体光谱之间的异同。给出了激光等离子体光谱的时间演化和空间分布的基本特征,并初步讨论了与这些特征相关的等离子体物理特性。这些结果有助于加深对激光等离子体特性和机理,特别是对等离子体产生后的弛豫过程和复合机制的了解。 相似文献
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本文叙述了在激光磁共振实验中。利用横向磁光旋转效应-Voigt效应来改善信噪比,并给出这种方法的实验结果和理论分析,利用这种方法还可以简便地分别对σ和π跃迁谱进行测量。 相似文献
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采用浓度调制光谱技术研究了连续交流放电产生的氮等离子体喷束。当放电峰峰电压VPP大于9.6kV时,氮离子以脉冲形式产生,每个放电电压周期产生一次。此时监测到交流放电电流上有一反向电流尖峰,该电流尖峰是等离子体喷束中氮离子惯性运动形成的,其强度与浓度调制光谱的强度成正比。根据浓度调制光谱的1f/2f检测结果,提出了一个理论模型,解释了上述现象。 相似文献
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Based on the global analysis of all available and reliable data for isotopic species 14NmO(m=16,17,18), the 14N16O rovibrational spectral lines are calculated with very high accuracy and completely agree with previous results. These lines with relative intensities can be achieved as an infrared frequency standard in the spectral range 1600-5600 cm-1. The calculated rovibrational transitions of 14NmO(m=17,18) have the same accuracy as that for 14N16O although their data are rare due to their small natural abundance. 相似文献