Regular Article – Atomic and Molecular Collisions
Fragmentation of tyrosine by high-energy electron impact
Institute of Theoretical Physics and Astronomy, Vilnius University, 3 Sauletekio av., 10257, Vilnius, Lithuania
2 Institute of Atomic Physics and Spectroscopy, University of Latvia, 3 Jelgava street, LV-1004, Riga, Latvia
3 Institute of Electron Physics, National Academy of Sciences of Ukraine, 21 Universitetska str, 88017, Uzhgorod, Ukraine
Accepted: 5 January 2023
Published online: 20 January 2023
The experimental mass spectra of the tyrosine molecule measured at different microtron accelerator-induced high-energy electron irradiation doses (i.e., 0, 5, and 20 kGy) have been identified and analyzed. The experimental investigation was carried out along with the theoretical study performed by Becke’s three-parameter hybrid density functional approach without and with the inclusion of electric and magnetic fields. It has been shown that high-energy (11.5 MeV) electrons cause irreversible changes in the structure and energy parameters of the molecule under study. The study revealed the importance of proton transfer for fragment formation of the irradiated and non-irradiated tyrosine.
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