Division of Combustion Physics, Lund University, P.O. Box 118, 221 00 Lund, Sweden.
J Chem Phys. 2012 Aug 21;137(7):074302. doi: 10.1063/1.4742915.
S-branch N(2)-H(2) Raman linewidths have been measured in the temperature region 294-1466 K using time-resolved dual-broadband picosecond pure rotational coherent anti-Stokes Raman spectroscopy (RCARS). Data are extracted by mapping the dephasing rates of the CARS signal temporal decay. The J-dependent coherence decays are detected in the time domain by following the individual spectral lines as a function of probe delay. The linewidth data set was employed in spectral fits of N(2) RCARS spectra recorded in binary mixtures of N(2) and H(2) at calibrated temperature conditions up to 661 K using a standard nanosecond RCARS setup. In this region, the set shows a deviation of less than 2% in comparison with thermocouples. The results provide useful knowledge for the applicability of N(2) CARS thermometry on the fuel-side of H(2) diffusion flames.
S 支 N(2)-H(2) 喇曼线宽已在 294-1466 K 的温度范围内使用时间分辨双宽带皮秒纯旋转相干反斯托克斯喇曼光谱（RCARS）进行了测量。通过映射 CARS 信号时间衰减的退相速率提取数据。在时域中通过随探针延迟作为函数跟踪单个光谱线来检测 J 相关的相干衰减。在使用标准纳秒 RCARS 装置在标定温度条件下在 N(2)和 H(2)二元混合物中记录的 N(2)RCARS 光谱的光谱拟合中使用了线宽数据集。在该区域，与热电偶相比，该数据集的偏差小于 2%。结果为 N(2) CARS 测温在 H(2)扩散火焰的燃料侧的适用性提供了有用的知识。
