首页> 外文期刊>The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory >O(~1D_2-~3P_(2,1,0) 630.0,636.4,and 639.2 nm Forbidden Emission Line Intensity Ratios Measured in the Terrestrial Nightglow
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O(~1D_2-~3P_(2,1,0) 630.0,636.4,and 639.2 nm Forbidden Emission Line Intensity Ratios Measured in the Terrestrial Nightglow

机译:在地面夜光中测得的O(〜1D_2-〜3P_(2,1,0)630.0、636.4和639.2 nm禁止发射线强度比

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摘要

The intensity ratio of the neutral oxygen "red" emission lines O(~1D_2-~3P_(2,1)) 630.0 nm to 636.4 nm has been measured in terrestrial nightglow spectra obtained from astronomical instrumentation.The observed intensity ratio,I(630.0 nm)/I(636.4 nm) = 2.997 +- 0.016,is consistent with the value of 2.997 determined from the recent spontaneous emission coefficient calculations of Storey and Zeippen (2000),distinctly lower than the value of 3.10 calculated from those coefficients recommended by the National Institutes of Standards and Technology (NIST),and lower than the value of 3.1 measured by laboratory experiment (Kernahan and Pang,1975).A weak emission line measured at 639.174 +- 0.003 nm has also been observed in these spectra and identified as the highly optically forbidden transition O(~1D_2-~3P_0) 639.1773 nm of the same multiple!as the red lines.The observed intensity ratio,I(636.4 nm)/I(639.2 nm) = 1700 +- 700,is a factor of 2 lower than that predicted by most recent theoretical calculations.
机译:在从天文仪器获得的地面夜光光谱中测量了中性氧“红色”发射线O(〜1D_2-〜3P_(2,1))630.0 nm至636.4 nm的强度比。观察到的强度比I(630.0 nm)/ I(636.4 nm)= 2.997 +-0.016,与最近由Storey和Zeippen(2000)计算的自发发射系数计算得出的2.997值一致,远低于由美国国家标准与技术研究院(NIST),并且低于通过实验室实验测得的3.1值(Kernahan和Pang,1975年)。在这些光谱中还观察到了弱光谱发射线,测得的光谱为639.174±0.003 nm作为高度光学禁止的跃迁O(〜1D_2-〜3P_0)639.1773 nm,与红线的倍数相同。观察到的强度比I(636.4 nm)/ I(639.2 nm)= 1700 +-700为a比最近的理论预测的低2倍l计算。

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