首页 | 本学科首页   官方微博 | 高级检索  
     检索      


Silicon ion chemistry in the ionosphere
Authors:EE Ferguson  DW Fahey  FC Fehsenfeld  DL Albritton
Institution:Max Planck Institut für Kernphysik, Heidelberg, P.O. Box 103980, Federal Republic of Germany;Aeronomy Laboratory, NOAA Environmental Research Laboratories, Boulder, CO 80303, U.S.A.
Abstract:Loss processes which remove Si+ ions selectively relative to other meteor-derived atomic ions in the E- and D-regions of the ionosphere have been identified and measured in the laboratory. The major Si+ loss in the E-region is the reaction Si+ + H2O → HSiO+ + H (1) with a rate constant 2.3 ± 0.9 × 10?10 cm3s?1 at 300 K. The corresponding reactions with Fe+, Mg+ and other metallic meteor ions are endothermic. Presumably (1) is followed by a fast dissociative-recombination with electrons to produce neutral SiO or Si. At lower altitudes Si+ ions associate in a three-body reaction with O2 with a much larger rate constant than the corresponding associations of Fe+ and Mg+ with O2.
Keywords:
本文献已被 ScienceDirect 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号