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我们使用Monte Carlo型计算机模拟技术的潜影形成基本模型考察了氧气和水汽对潜影形成的影响.从模拟得到的结果表明:氧气和水汽可看作是两个彼此独立的影响因子,它们在潜影形成的过程中,各起着不同的作用。吸附在颗粒表面上的氧分子可以捕获一个光电子而生成过氧化基(O_2~-),此过氧化基如遇上光解产生的溴原子(而不是通常认为的水分子)则又可恢复成氧分子。因此,氧的存在会速成光电子的损失。与氧的作用不同,水分子的存在则因为可使光解形成的银原子簇极化,从而降低了银原子簇在形成过程中竞争光电子的能力,阻碍了浓缩斑的生成和成长。
We use Monte Carlo computer simulation of the latent image formation of the basic model to examine the impact of oxygen and water vapor on the latent image from the simulation results show that: oxygen and water vapor can be seen as two independent of each other, they are The formation of latent image, each plays a different role. Oxygen molecules adsorbed on the surface of a particle can capture a photoelectron and generate a peroxide group (O 2 - -) that reverts to the bromine atom (rather than the water molecule that is usually thought) in the case of photolysis Oxygen molecules. Therefore, the presence of oxygen can quickly become photoelectrons loss. Unlike oxygen, the presence of water molecules polarizes silver clusters formed by photolysis, reducing the ability of silver clusters to compete for photoelectrons in the formation process and hindering the formation and growth of concentrated spots.