Observations of H3− and D3− from dielectric barrier discharge plasmas

✍ Scribed by Wenchun Wang; Andrey K Belyaev; Yong Xu; Aimin Zhu; Chongfa Xiao; Xue-Feng Yang

• Book ID: 104108469
• Publisher: Elsevier Science
• Year: 2003
• Tongue: English
• Weight: 272 KB
• Volume: 377
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/s0009-2614(03)01210-7

✦ Synopsis

This work reports the reliable experimental observations of the simplest negative triatomic ions, H À 3 and D À 3 anions, the stability of which has been debated for several decades, from dielectric barrier discharge hydrogen and deuterium plasmas. The observed H À 3 and D À 3 mass signals with widely distributed kinetic energies, from a few eV to $100 eV, are contributed from their ground states with lifetimes greater than 8-35 ls. The agreement between theoretical and experimental results for H À 3 has been reached. The three-body collision process is proposed to be the dominant formation mechanism for the H À 3 and D À 3 anions.