Figure3 (IMAGE) Kanazawa University Caption (a) The recombination (collision) rate coefficient of PEG ion with different number of charges. This collision rate coefficient showed good agreement with experimentally measured charge reduction rate. (b) Translational velocity distribution of NO<sub>2</sub>- ion at collision. We expect the kinetic energy can be used to evaluate the possibility of collision induced reaction. Credit Kanazawa University Usage Restrictions The image may only be used with appropriate caption and credit. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.