High-brightness cm-1-resolution threshold photoelectron spectroscopic technique

Katsumi Kimura; Masahiko Takahashi

doi:10.1117/12.58139

1 April 1992 High-brightness cm^-1-resolution threshold photoelectron spectroscopic technique

Katsumi Kimura, Masahiko Takahashi

Proceedings Volume 1638, Optical Methods for Time- and State-Resolved Chemistry; (1992) https://doi.org/10.1117/12.58139
Event: OE/LASE '92, 1992, Los Angeles, CA, United States

Abstract

We first describe some characteristics of our compact photoelectron analyzers capable of high- resolution (1 - 2 cm^-1) cation spectroscopy of molecules in two-color ((omega) ₁,(omega) ₂) laser experiments of resonantly enhanced multiphoton ionization. Threshold ionization photoelectrons lower than a few cm^-1 are collected as a function of (omega) ₂ by applying a pulsed electric field at 500 ns at each laser shot, while energetic photoelectrons are removed by angular- and time-resolved discrimination. Second, we demonstrate a rotational spectrum due to NO⁺ obtained by this technique to examine our energy resolution. Third, we mention a few examples of low-frequency vibrational spectra of cation radicals: (1) rotational isomers, (2) Ar-NO van der Waals complex, and (3) aniline- Ar_n complexes (n equals 1,2).

Citation Download Citation

Katsumi Kimura and Masahiko Takahashi "High-brightness cm^-1-resolution threshold photoelectron spectroscopic technique", Proc. SPIE 1638, Optical Methods for Time- and State-Resolved Chemistry, (1 April 1992); https://doi.org/10.1117/12.58139

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