Excitation of L-valine Molecules by Electrons and Photons

Authors

Yu Bandurin¹ , Anatoly Zavilopulo¹ , Sh Molnar¹ , O Shpenik¹

1. The National Academy of Sciences of Ukraine

Conference / event

International Scientific Conference: Uzhhorod School of Atomic Physics and Quantum Electronics, May 2022 (Virtual)

Poster summary

Optical emission spectra of the L-valine molecule and optical excitation functions of molecular bands and the Hβ spectral line were measured in the gas phase using electron impact. In the spectra of optical emission in the wavelength range of 250-500 nm, intense emission bands were found at energies of incident electrons of 30, 50 and 70 eV. Analysis of structural features of the valine molecule suggested a fragmentation scheme with the formation of excited particles in collisions with electrons. A notable feature of the presented optical excitation functions is a different growth dynamics with an increase in the energy of exciting electrons and the presence of a number of features and kinks, which are especially pronounced for λ = 305 nm and λ = 311 nm. The excitation thresholds were determined from the initial sections of the excitation functions of the most intense spectral lines by the least squares method. The photoluminescence spectra of L-valine were measured for the first time on a Shimadzu RF-6000 spectrofluorophotometer in the spectral range of 400-800 nm for excitation wavelengths of 250, 275, 333, 351 and 380 nm.

Keywords

Luminescence, Optical spectroscopy, L-valine, Excitation, Electron

Research areas

Chemistry, Physics

References

No data provided

Funding

No data provided

Supplemental files

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Additional information

Competing interests

None declared.

Data availability statement

Data sharing not applicable to this poster as no datasets were generated or analyzed during the current study.

Creative Commons license

Copyright © 2022 Bandurin et al. This is an open access work distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.