Investigation of slowing down and charge-exchange of nickel and uranium ions in gases and solids in the energy range (60 - 200) MeV/u [Elektronische Ressource] / vorgelegt von André Fettouhi

Investigation ofSlowing Down and Charge-Exchangeof Nickel and Uranium Ionsin Gases and Solids in theEnergy Range (60 - 200) MeV/uInauguraldissertationzurErlangung des Doktorgradesder Naturwissenschaftender Justus-Liebig-Universit¨at GießenFachbereich 07Physik, Mathematik und Informatik, Geographievorgelegt vonAndr´e Fettouhiaus Odense, D¨anemarkGießen, den 31. M¨arz 2006SummaryInthisthesisnewslowingdownandcharge-statemeasurementswillbepresentedintheenergy range of (60 - 200) MeV/u. These measurements were done using the FragmentSeparator (FRS) facility at GSI in Darmstadt. The presented data were taken duringtwo experimental runs.27+The experiments were divided into two parts. In the first part a 200 MeV/u Nibeam was used. The evolution of charge states as a function of the target thicknesswas investigated covering both the non-equilibrium and equilibrium region. This wasdone with various mono-atomic materials (Z = 6, 7, 10, 13, 18, 22) and compound2materials (ethylene, polyethylene and polypropylene). From the measured charge-state distributions the one-electron ionization and capture cross sections have beenextracted. A 40 % gas-solid difference is observed in the ionization cross sections forthe mono-atomic materials. In the compound materials a 30 % difference is observedbetween ethylene and the polymers.Theexperimentalcrosssectionsforthemono-atomicmaterialshavebeencomparedwiththeoreticalcalculations[1,2].