Методом масс-спектрометрического анализа исследовано образование ионных продуктов однократной и диссоциативной ионизации молекулы валина (C5H11NO2) электронами высоких (11.5 МeV) и низких (менее 150 eV) энергий. Получены масс-спектры исследуемой молекулы и припороговые функции выхода ее ионных фрагментов, для которых определены абсолютные значения энергий появления. Проведенный анализ изменений масс-спектров молекулы валина, облученной при дозах излучения 5 и 20 kGy, по сравнению с масс-спектром необлученных молекул показывает, что высокоэнергетическое облучение приводит к необратимым изменениям в структуре части исходных молекул. DOI: 10.21883/PJTF.2017.09.44571.16322
Using the mass-spectrometric analysis technique, formation of the ionic products of the single and dissociative ionization of the glutamine molecule (C5H10N2O3) at its interaction with the low (70 eV) and high (11.5 MeV) energy electrons has been studied. The experimental mass-spectra of the above molecule measured at different irradiation doses (5, 10 and 20 kGy) and the near-threshold areas of the ionic fragment yield functions have been analyzed, the absolute ion fragment appearance energies have been found. The three-electrode electron gun and the electron accelerator (microtron) were used as the electron beam sources. The analysis of the behaviour of the measured glutamine molecule mass-spectra irradiated at the above doses demonstrates, as compared to the irradiated molecule mass-spectrum, that the high-energy irradiation of the initial molecule results in the irreversible changes of its structure.
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