• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Geophysical Research. Biogeosciences >EVOLUTION OF NEGATIVE SMALL IONS AT ENHANCED IONIZATION
【24h】

EVOLUTION OF NEGATIVE SMALL IONS AT ENHANCED IONIZATION

机译：增强电离时负离子的演变

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The paper deals with the modeling of the evolution(chemical kinetics) of tropospheric small ions for the case where the rate of ion generation is substantially above normal. Such types of situations can be found in the regions where because of either natural or artificial conditions the rate of ion generation is increased. This model would be applicable to the results of the measurements performed a few years ago in Chernobyl and also to the lab instruments, where enhanced ionization is used. This paper deals only with the effects which are caused by the evolution of negative ions. The concentrations of positive ions have been calculated for the natural concentrations of neutral gases and henceforth are considered constant. The model considers only ion-molecular reactions; the reactions between neutral compounds have not been taken into account. The model describing the kinetics of positive ions contains 1048 reactions, 199 ions, and 131 neutral compounds; the negative ion model includes 474 reactions, 143 ions, and 106 neutral compounds. The results show that if the ionization rate is substantially increased, the concentrations: of neutral gases will change. Many of these changes can be estimated. The estimated concentrations are (in cubic centimeters): [NO] = 2.0x10(10); [NO2] = 3.5x10(7); [N2O] = 8.0x10(13); [HNO3] = 1.0x10(7); [SO2] = 3.0x10(8). Next, the concentrations of OH, O, N, H, HNO2, HO2, and CH3 increase nearly independently of the concentrations of neutral gases. The extent of the change in the concentrations of OH, O, N, H, HNO2, HO2, and CH3 cannot be estimated, as the feedback processes through ion-molecular reactions are practically absent. The chemical kinetics of ions at a given gas composition is significantly different from the kinetics at the normal gas concentrations, i.e., because of both the changed concentrations of neutral gases and the shortened lifetimes of ions. In the steady state the ions O-2(-)(H2O)(k) become dominant, whereas the ions CO3-(H2O)(k) hold the second place. [References: 19]
机译：在离子产生速率大大高于正常值的情况下，本文对流层小离子的演化（化学动力学）进行建模。在由于自然或人工条件而导致离子产生速率增加的区域中会发现此类情况。该模型将适用于几年前在切尔诺贝利进行的测量结果，也适用于使用增强电离的实验室仪器。本文仅涉及由负离子的演化引起的影响。已针对中性气体的自然浓度计算出了正离子的浓度，此后就认为该浓度是恒定的。该模型仅考虑离子分子反应。尚未考虑中性化合物之间的反应。描述正离子动力学的模型包含1048个反应，199个离子和131个中性化合物。负离子模型包括474个反应，143个离子和106个中性化合物。结果表明，如果电离速率大大提高，中性气体的浓度将发生变化。这些变化中有许多是可以估计的。估计的浓度为（以立方厘米为单位）：[NO] = 2.0x10（10）; [NO2] = 3.5x10（7）; [N2O] = 8.0x10（13）; [HNO3] = 1.0x10（7）; [SO2] = 3.0x10（8）。接下来，OH，O，N，H，HNO2，HO2和CH3的浓度几乎独立于中性气体的浓度而增加。 OH，O，N，H，HNO2，HO2和CH3浓度的变化程度无法估算，因为实际上缺少通过离子分子反应的反馈过程。在给定气体成分下，离子的化学动力学与正常气体浓度下的动力学显着不同，即由于中性气体浓度的变化和离子寿命的缩短。在稳态下，离子O-2（-）（H2O）（k）占优势，而离子CO3-（H2O）（k）居第二位。 [参考：19]

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号