利用介质阻挡射频放电产生了单重态氧，实验中在放电气体中加入了一定量的NO气体以提高单重态氧的相对产率。通过研究放电出口处单重态氧发光强度与NO流量的变化关系，考查了NO分子对放电产生单重态氧的影响。实验结果表明，NO分子对单重态氧相对产率的提高作用呈现出先迅速增强，继而缓慢达到饱和并略有下降。在所设计的实验条件下，最佳NO流量应为O2流量的3%左右。给出了NO分子对放电产生单重态氧浓度的拟合公式，拟合结果与实验值吻合很好。从化学反应机理上对该公式给出了解释，提出了NO分子猝灭氧原子过程的一种新的可能机理，估算出该过程的速率常数为1.8×10-30 cm6/s。

Singlet delta oxygen O2(a1Δ) molecules are generated by O2/He gaseous mixture dielectric barrier radio-frequency discharge. NO gas is added into main gas flow to improve the relative yield of O2(a1Δ). Influence of NO on the relative yield of O2(a1Δ) is examined by observing the O2(a1Δ) emission intensity as a function of NO flow rate. The experimental results show that the O2(a1Δ) relative yield reaches a saturation with the increase of NO flow rate and then slowly decreases. The optimal NO flow rate is about 3% of O2 flow rate under the conditions of the experiments. A new reaction mechanism including three-body oxygen atom recombination is proposed. According to the new mechanisms, a fitting function is given which agrees well with the experimental results. The rate constant of the new mechanism is obtained to be 1.8×10-30 cm6/s.