Fragmentation of a valine molecule by electron impact
| Autor: | V. S. Vukstich, A. V. Snegurskii, I. G. Megela, A. V. Papp, L. G. Romanova |
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| Rok vydání: | 2017 |
| Předmět: |
010302 applied physics
Physics and Astronomy (miscellaneous) Physics::Instrumentation and Detectors Chemistry Photochemistry Mass spectrometry 01 natural sciences Ion Fragmentation (mass spectrometry) Ionization 0103 physical sciences Mass spectrum Molecule Irradiation Physics::Chemical Physics Atomic physics 010306 general physics Electron ionization |
| Zdroj: | Technical Physics Letters. 43:416-420 |
| ISSN: | 1090-6533 1063-7850 |
| DOI: | 10.1134/s1063785017050133 |
| Popis: | The formation of ion products of single and dissociative ionization of a valine molecule (C5H11NO2) by high-energy (11.5 MeV) and low-energy (below 150 eV) electrons has been investigated by mass spectrometry. Mass spectra of this molecule and near-threshold functions of yield of its ion fragments, for which the magnitudes of occurrence energies are determined, have been obtained. The analysis of the changes in mass spectra of valine molecules irradiated with doses of 5 and 20 kGy in comparison with those for unirradiated molecules shows that high-energy irradiation changes irreversibly the structure of some of the initial molecules. |
| Databáze: | OpenAIRE |
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