Observation of autoionization in O2 by an electron-electron coincidence method

✍ Scribed by J.P. Doering; J. Yang; J.W. Cooper

• Publisher: Elsevier Science
• Year: 1995
• Tongue: English
• Weight: 485 KB
• Volume: 232
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(94)01323-n

✦ Synopsis

A strong transition to an autoionizing state has been observed in 02 at 16.83 + 0.11 eV by means of a new electron-electron coincidence method. The method uses the fact that electrons arising from autoionizing states appear at a constant energy loss corresponding to the excitation energy of the autoionizing state rather than at a constant ionization potential as do electrons produced by direct ionization. Comparison of the present data with previous photoionization studies suggests that the autoionizing 02 state is the same state deduced to be responsible for abnormal vibrational intensities in the Of X 21Is ground state when 16.85 eV Ne (I) photons are used. These electron-electron coincidence experiments provide a direct new method for the study of autoionization produced by electron impact.

Of X 21"Ig ground state which was expected from the