Rase S, Porstendörfer J
Radiat Environ Biophys. 1975;11(4):281-8. doi: 10.1007/BF01326750.
Some experiments concerning the photochemical production of condensation nuclei are described. Preliminary measurements of filtered atomospheric air, initially free of particles yielded high concentrations of particles by reactions in the dark when the air was previously irradiated by sunlight. In further investigations a definite composition of pure gases was used. The formation of nitric acid particles from NO2 in pure nitrogen of different relative humidities in the dark and under influence of light was investigated. No particle formation was found which could be correlated to any production of nitric acid nuclei. Even within a spectral region in which photolysis of NO2 takes place no HNO3-nucleation could be found. The particles detected under certain conditions of irradiation originate from impurities in the walls of the reaction chamber. Particle growth in an irradiated mixture of N2 and NO2 with benzene is demonstrated and the mean radius of particles is calculated from measurement with a diffusion battery.
描述了一些关于光化学生成凝结核的实验。对最初不含颗粒的过滤大气进行的初步测量表明，当空气先前受到阳光照射时，通过黑暗中的反应会产生高浓度的颗粒。在进一步的研究中，使用了确定组成的纯气体。研究了在黑暗和光照影响下，不同相对湿度的纯氮气中由二氧化氮形成硝酸颗粒的情况。未发现与任何硝酸核产生相关的颗粒形成。即使在二氧化氮发生光解的光谱区域内，也未发现硝酸成核现象。在特定辐照条件下检测到的颗粒源自反应室壁中的杂质。展示了在氮气、二氧化氮与苯的辐照混合物中的颗粒生长情况，并通过扩散电池测量计算出颗粒的平均半径。
