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在流动反应管中,利用高纯N2空心阴极放电制备活性氮,研究了活性氮与溴分子碰撞反应得到的发射光谱.在540～800nm波段观察到了较强的NBr(b1Σ+→X3Σ-)跃迁发射谱,在292nm处观察到了Br2(D’→A’)辐射跃迁.实验结果表明,得到的NBr(b1Σ+)显示出了非弛豫的发射特征,最高振动能级为ν’=9.激发态的NBr(b1Σ+)是由活性氮中的N(2P)原子与Br2直接反应生成的.
In flowing reaction tube, the active nitrogen was prepared by high purity N2 hollow cathode discharge, and the emission spectrum of the reaction between reactive nitrogen and bromine molecule was studied. The strong NBr (b1Σ + → X3Σ-) transition was observed in the 540-800 nm band Emission spectra, the transition of Br2 (D ’→ A’) radiation was observed at 292 nm.The experimental results show that NBr (b1Σ +) shows a non-relaxation emission characteristic with the highest vibrational level of ν ’= 9. The excited state NBr (b1Σ +) is generated by the direct reaction of N (2P) atoms in active nitrogen with Br2.