研究目的
Investigating the rovibrational spectrum of the Ne–NO(X2Π) open-shell complex in the 5.3 μm region to understand its structural relaxation upon excitation of the overall rotation and the internal rotation of the NO subunit.
研究成果
The high resolution rovibrational spectrum of Ne–NO has been successfully measured and analyzed, revealing strong structural relaxation upon excitation of the overall rotation and the internal rotation of the NO subunit. The band origin is located at 1876.0606(97) cm?1, blue-shifted from that of the NO monomer by only 0.0888 cm?1.
研究不足
The analysis was limited by the complexity of the spectrum and the limited experimental data. The standard deviation of the fit was 0.0052 cm?1, which is acceptable but indicates some limitations in the model's ability to fully capture the spectrum's details.
1：Experimental Design and Method Selection:
The rovibrational spectrum was measured using distributed feed-back quantum cascade lasers to probe the direct absorption in a slit-jet supersonic expansion.
2：Sample Selection and Data Sources:
The sample was generated by supersonic expansion of 5% NO diluted in Ne through a home-made slit nozzle.
3：List of Experimental Equipment and Materials:
Three DFB-QCLs were used to cover a spectral range of 1872–1888 cm?
4：The laser beam was divided into three parts and passed through a pulsed molecular jet, a reference gas cell filled with N2O, and an internally coupled confocal Fabry-Perot interferometer. Experimental Procedures and Operational Workflow:
The laser current was modulated externally by a triangle wave at a frequency of 50 Hz. Each ramp spanned a frequency range of about
5：3–4 cm?The line frequencies of N2O in HITRAN compilation were used for absolute wavelength calibration. Data Analysis Methods:
The observed spectrum was analyzed using a modified semirigid asymmetric rotor Hamiltonian.
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