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Sensitive fluorescence spectroscopy of jet cooled (NO2)-N-15

机译:喷射冷却(NO2)-N-15的灵敏荧光光谱

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摘要

A spectroscopic setup designed for high resolution spectroscopy of jet cooled molecules is described. The primary features of the new setup are an exceedingly low gas consumption and a high detection efficiency, which are achieved by optimizing the detection geometry of the time gated fluorescence in combination with a special piezo valve. This makes the setup particularly suitable for studying expensive gases that come in small supply. The performance of the setup is demonstrated on the first A(2)B(2) <-- X(2)A(1) rovibronic transitions of (NO2)-N-15-O-16 measured in a. jet. A rotational analysis is given for a couple of different bands. In addition, an exceptionally strong band with band origin at around 14 8 50 cm(-1) is reported that is of interest particularly for atmospheric applications. The (NO2)-N-15-O-16 gas consumption is as low as 0.025 mg or 0.5 mumol/cm(-1) spectral range. (C) 2004 Elsevier B.V. All rights reserved.
机译:描述了一种设计用于喷射冷却分子的高分辨率光谱的光谱装置。新设置的主要特点是极低的气体消耗和高的检测效率,这是通过结合特殊的压电阀优化时间选通荧光的检测几何形状来实现的。这使得该设置特别适合研究少量供应的昂贵气体。该设置的性能在(a)中测量的(NO2)-N-15-O-16的第一个A(2)B(2)<-X(2)A(1)振动电子跃迁上得到了证明。喷射。给出了几个不同频段的旋转分析。此外,据报道,一条非常强的带,其带起源在14 8 50 cm(-1)左右,这在大气应用中尤其有意义。 (NO2)-N-15-O-16气体消耗量低至0.025 mg或0.5 mumol / cm(-1)光谱范围。 (C)2004 Elsevier B.V.保留所有权利。

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