The distinction of direct and pulsed-field ionized zero kinetic energy photoelectrons in electron/ion coincidence experiments
✍ Scribed by Karl-Michael Weitzel; Felix Güthe
- Publisher
- Elsevier Science
- Year
- 1996
- Tongue
- English
- Weight
- 485 KB
- Volume
- 251
- Category
- Article
- ISSN
- 0009-2614
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✦ Synopsis
The direct formation of zero kinetic energy photoelectrons (ZEKE-PE) as well as the formation of PEs by delayed pulsed-field ionization (PFI-PE) has been investigated in photoelectron photoion coincidence (PEPICO) experiments employing synchrotron radiation. Direct ZEKE-PEs and delayed PFI-PEs can easily be distinguished by their time of flight if a small static background field is applied. Coincidence experiments have been performed between either one direct ZEKE-PE or one PFI-PE and the corresponding photoion in the photoionization of argon atoms. The experiments prove that previous ZEKE-PEPICO experiments of our group [Chem. Phys. Letters 224 (1994) 371; Chem. Phys. 187 (1994) 117] were free from the influence of delayed pulsed-field ionization. To our knowledge this is the first report of a pure PFI photoelectron spectrum (PFI-PES) recorded with synchrotron radiation.