Effects of the environment on the uracil molecule ionization induced by 12C4+ ion beam

In this study the fragmentation of isolated uracil molecules, uracil clusters and hydrated uracil clusters induced by 12 C 4+ ions at 36 keV energy has been investigated. The mass spectra obtained by a TOF mass spectrometer are analyzed and compared to each other in order to see how the environment affects the fragmentation dynamics. The main differences between the mass spectra are highlighted and possible fragmentation pathways are proposed

Roadmap on dynamics of molecules and clusters in the gas phase

This roadmap article highlights recent advances, challenges and future prospects in studies of the dynamics of molecules and clusters in the gas phase. It comprises nineteen contributions by scientists with leading expertise in complementary experimental and theoretical techniques to probe the dynamics on timescales spanning twenty order of magnitudes, from attoseconds to minutes and beyond, and for systems ranging in complexity from the smallest (diatomic) molecules to clusters and nanoparticles. Combining some of these techniques opens up new avenues to unravel hitherto unexplored reaction pathways and mechanisms, and to establish their significance in, e.g. radiotherapy and radiation damage on the nanoscale, astrophysics, astrochemistry and atmospheric science

Іонізація молекули урацилу повільними електронами

Modernization of the hypocycloidal electron spectrometer using a gas-filled cell for measuring the total ionization cross-section of molecules at low electron energies was performed. The measuring method and the method for obtaining the first ionization threshold and appearance energies of ion-fragments were developed. Approbation of theapparatus is carried out for the uracil moleculeВыполнена модернизация гипоциклоидального электронного спектрометра с использованием паронаполненной ячейки для измерения полного сечения ионизации молекул при столкновении с медленными электронами. Приводится методика определения первого порога ионизации и энергий появления ионов- фрагментов. Апробация установки проведена для молекулы урацилаВиконано модернізацію гіпоциклоїдального електронного спектрометра з використанням паронаповненої комірки для вимірювання повного перерізу іонізації молекул при зіткненні з повільними електронами. Наведено методику визначення першого порогу іонізації і енергій появи іонів-фрагментів. Апробація установки проведена для молекули урацил

Fragmentation of pure and hydrated clusters of 5Br-uracil by low energy carbon ions: observation of hydrated fragments

International audienc