Measurements of single-electron detachment cross-sections for $\chem{Cu^{-}}$ and $\chem{Ag^{-}}$ in collision with $\chem{He}$ and $\chem{N_{2}}

• Published in: Europhysics letters Vol. 56; no. 6; pp. 797 - 800
• Main Authors: Zhang, Xuemei, Wu, Shimin, Li, Guangwu, Lu, Fuquan, Tang, Jiayong, Yang, Fujia
• Format: Journal Article
• Language: English
• Published: EDP Sciences 01.12.2001
• Subjects: 34.70.+e
• ISSN: 0295-5075; 1286-4854
• DOI: 10.1209/epl/i2001-00590-3

Electron detachment of negative ions, in collision with a static gas target, is known to be one of the most fundamental processes occurring in negative-ion-atom collisions. The experimental results of cross-section data for transition element ions in collision with gases are of great interest not only for their potential application value, but also as a challenge to a theoretical study of complex negative ions in collision with atoms or molecules. In the present work, the single-electron detachment (SED) cross-sections for $\chem{Cu^{-}}$ and $\chem{Ag^{-}}$ in collision with $\chem{He}$, $\chem{N_{2}}$ have been obtained in the energy region of 10-30$\un{keV}$. By using a single-particle detector for both neutral atoms and ions, the experimental uncertainty of the results is improved in this work.