Eur. Phys. J. D (2021) 75: 246
https://doi.org/10.1140/epjd/s10053-021-00258-6

Regular Article - Atomic and Molecular Collisions

Fragmentation of tyrosine by low-energy electron impact

¹ Institute of Theoretical Physics and Astronomy, Vilnius University, 3 Sauletekio av., 10257, Vilnius, Lithuania
² Institute of Electron Physics, Ukrainian National Academy of Sciences, 21 Universitetska str., 88017, Uzhgorod, Ukraine

^a Jelena.Tamuliene@tfai.vu.lt

Received: 15 July 2021
Accepted: 31 August 2021
Published online: 15 September 2021

Abstract

New experimental data on the fragmentation of the tyrosine amino acid molecule (${\text{C}}_9{\text{H}}_{11}{\text{NO}}_3)$ are presented being related to the formation of the ionized products due to the low-energy electron impact. The resulting fragments have been identified and analyzed using an extensive DFT theory approach. The results allowed the main pathways of the electron-impact tyrosine molecule fragmentation to be suggested. The absolute appearance energies for several fragments have been measured experimentally and calculated theoretically, compared and analyzed.