Hannover 2016 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

A: Fachverband Atomphysik

A 19: Collisions, scattering and correlation phenomena

A 19.2: Poster

Dienstag, 1. März 2016, 16:30–19:00, Empore Lichthof

Proton-impact ionization cross sections of tetrahydrofuran measured from 0.3 to 3.0 MeV by electron spectroscopy — •Mingjie Wang, Benedikt Rudek, Daniel Bennett, Marion Bug, Ticia Buhr, and Hans Rabus — Physikalisch-Technische Bundesanstalt, Bundesallee 100, 38116 Braunschweig, Germany

Within the framework of the EMRP Project "BioQuaRT", the track structure simulation codes GEANT4-DNA [1] and PTra [2] have been extended with experimental DNA interaction cross sections to simulate ionizing radiation interactions with biological matter on cellular (micrometric) and subcellular (nanometric) scales.

For this purpose, double differential cross sections (DDCS) for ionization of tetrahydrofuran by protons with energies from 0.3 to 3.0 MeV were measured at the PTB ion accelerator facility. The electrons emitted at angles between 15° and 150° in 15° steps relative to the proton beam direction were detected with an electrostatic hemispherical electron spectrometer. The experimental DDCS are compared to the semi-empirical Hansen-Kocbach-Stolterfoht model [3] as well as to the recently reported calculation based on the dielectric response function formalism [4]. This comparison shows a good agreement in a broad range of emission angles and energies of secondary electrons.

[1] S. Incerti et al., Med. Phys. 37, 4692 (2010).

[2] M. U. Bug et al., Radiat. Phys. Chem. 81, 1804 (2012).

[3] M. A. Bernal et al., Nucl. Instrum. Methods Phys. Res., Sect. B 251, 171 (2006).

[4] P. de Vera et al., Phys. Rev. Lett. 114, 018101 (2015).