中国物理B ›› 2018, Vol. 27 ›› Issue (8): 85202-085202.doi: 10.1088/1674-1056/27/8/085202
• PHYSICS OF GASES, PLASMAS, AND ELECTRIC DISCHARGES • 上一篇 下一篇
Ahmed Asaad I Khalil, Reem Al-Tuwirqi, Mohammed A Gondal, Noura Al-Suliman
Ahmed Asaad I Khalil1,4, Reem Al-Tuwirqi2, Mohammed A Gondal3, Noura Al-Suliman4
摘要:
We report on the observation of new fluorescence emission spectral transitions obtained from NO diatomic molecule in the region from ultraviolet (UV) to near infrared (NIR) in a low power glow discharge system. This glow discharge electronic excitation populates different quartet and doublet states of NO in its proximity such as the A2Σ (υ=2), b4Σ- (υ=3), B2Π (υ=4), and X2Π (υ=33-32) states. Due to inter-system crossing, emission lines originating from these levels to lower lying states are recorded and spectral line assignments are performed. The observed systems include b4Σ--a4Π, B2Π-a4Π, a4Π-X2Π, A2Σ-X2Π, X2Π-X2Π (33-15), X2Π-X2Π (33-17), X2Π-X2Π (33-20), and X2Π-X2Π (33-18). This new information will conduce to the better understanding of the interesting features of NO molecule. Such parameters that affect the recording of low density of NO molecules are also discussed In addition to the factors such as the time evolution, argon gas concentration relative to NO mixture, the percentage of NO molecular gas concentration, discharge electric current signals and discharge applied voltage are studied. Those factors would enhance the fluorescence signal intensity of NO molecules. The recent results might be significant as reference data for optimizing the glow discharge spectrometer and diagnostics of NO gas.
中图分类号: (Laser ablation)