Differential electron-capture cross-sections in high energy ion-atom collisions : comparison of experiment and theory for the Thomas peak

The recent experimental observation of the Thomas peak on the differential cross-section for high energy electron capture is confronted with the theoretical prediction. Very good agreement is obtained for all scattering angles with the CDW approximation including the internuclear interaction.On compare l'observation expérimentale récente du « pic de Thomas » dans la section différentielle de capture d'électrons à haute énergie avec les prédictions théoriques. Un très bon accord est obtenu à tous les angles de diffusion avec l'approximation CDW tenant compte de l'interaction entre les noyaux

Computation of Distorted Wave Cross Sections for High-Energy Inelastic Collisions of Heavy Ions with Water Molecules

Irradiation of water and other molecules of biological interest by heavy ion beams is studied. Distorted wave models are employed to investigate the corresponding inelastic collisions. Cross sections for electronic capture, ionization, and excitation processes are determined as well as equilibrium charge-states and electronic stopping power. The influence of multiple ionization in liquid water radiolysis is analyzed