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Updated: Jul 14, 2026

Spatial Separation of Molecular Conformers and Clusters
Published on: January 9, 2014
Proton-induced frequency distributions of ionization cluster size in propane
G Hilgers1, E Gargioni, B Grosswendt
1Physikalisch-Technische Bundesanstalt, Bundesallee 100, 38116 Braunschweig, Germany. gerhard.hilgers@ptb.de
Abstract:
The frequency distribution of clustered ionizations produced by a proton beam was measured in a nanodosimetric volume of the size of a DNA segment by means of an ion-counting nanodosimeter in the energy range from 0.4 to 3.5 MeV. In order to meet the needs of the ion-counting nanodosimeter, the accelerator's primary beam was reduced in intensity by means of Rutherford scattering. The comparison between experimental results and Monte Carlo simulations show a good agreement in the energy dependence of the mean cluster size, while the experimental cluster size distributions show a higher amount of large ionization clusters compared with those obtained with the simulations.
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