中文摘要：

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人了一定量的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^-30cm^6／s。

英文摘要：

Singlet delta oxygen O2 （a^1△） 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 02 （a^1△）. Influence of NO on the relative yield of 02 （a^1△） is examined by observing the O5 （a^1△） emission intensity as a function of NO flow rate. The experimental results show that the 02 （a^1 △） 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 cm^6/s.