Sökning: "negative ions"
Visar resultat 11 - 15 av 125 avhandlingar innehållade orden negative ions.
11. Ions interacting with macromolecules : NMR studies in solution
Sammanfattning : Specific ion effects, identified for more than hundred years, play an important role in a wide range of phenomena and applications. Several mechanisms such as direct ion interaction with molecules have been suggested to explain these effects, but quantitative experimental evidence remains scarce. LÄS MER
12. On the Formation and Structure of the Ionosphere of Titan
Sammanfattning : We present results on the ionospheric structure around Titan observed during numerous deep (.... LÄS MER
13. Negative ion experiments at DESIREE : Photodetatchment studies of transitions and lifetimes of excited states of Ir-
Sammanfattning : In this thesis I present measurements using laser photodetachment to investigate negative ions of iridium produced in a cesium sputter ion source and stored in the cryogenic storage ring, DESIREE. The ions are photodetached by either a tunable OPO laser system or a tunable narrow bandwidth Titanium Sapphire laser. LÄS MER
14. Low-energy ions around comet 67P/Churyumov-Gerasimenko
Sammanfattning : Low-energy ions play important roles in the formation of the plasma environment around a comet. Reliable ways of measuring these ions are therefore of high importance to fully understand the processes and dynamics of this environment. Unfortunately, low-energy ions are infamously difficult to detect. LÄS MER
15. Photodetachment of Negative Ions. Experimental Investigations of Threshold and Continuum Structures
Sammanfattning : In this thesis photodetachment studies of atomic negative ions where one or several electrons are detached from a negative ion are presented. Negative ions are unique objects since their formation and destruction mechanisms strongly depend on the correlated motion of the valence electrons. LÄS MER