What question did this study set out to answer?

This research aims to explore the excitation processes of isolated guanine molecules when subjected to electron impact.

April 4, 2026

Excitation of the Gas-Phase Guanine Molecules by Electron Impact

Key Points

This research aims to explore the excitation processes of isolated guanine molecules when subjected to electron impact.
Isolated guanine molecules were excited by a beam of slow electrons at 100 eV energy.
Emissions were measured in the 250–500 nm wavelength range.
The resulting emission spectra were analyzed for spectral bands and lines.
Nineteen spectral bands and lines were observed in the emission spectra.
Emission spectra resulted from dissociative excitation and ionization processes.
The findings suggest new insights into the underlying electronic levels of guanine.

Abstract

The emission spectra of isolated guanine molecules have been obtained in the 250–500 nm wavelength range due to excitation by a beam of slow electrons. At a beam energy of 100 eV, nineteen spectral bands and lines have been observed in the spectrum. It has been shown that the guanine emission spectra are caused by processes of dissociative excitation of molecules, dissociative excitation with ionization, and by the primary excitation of the electronic levels of guanine. The biophysical implications of the obtained results are discussed.

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