Abstract
The FIRST (Fragmentation of Ions Relevant for Space and Therapy) experiment at GSI laboratory took data in summer 2011, studying the collisions of a 12C ion beam with Carbon and Au thin targets. The experiment main purpose is the double differential cross section measurement of the carbon ion fragmentation at energies that are relevant both for tumor therapy and space radiation protection applications (100-1000 MeV/u). The FIRST dataset contains carbon ions collisions on a 3.43 g·Cin−2 carbon target (about 24 M events) and on a 0.96 g·cm−2 Au target (about 4.5 M events). The SIS (heavy ion synchrotron) was used to accelerate the 12C ions at the energy of 400 MeV/u. The preliminary results of differential cross sections measurements as a function of angle and energy for carbon target, in the small angle region (θ ≤ 5°), are presented.
Highlights
IntroductionThe study of the nuclear fragmentation processes occuring in the interaction of highly energetic ions in matter is of great interest in basic research (e.g. to improve the understanding of hadronic showers development in the atmosphere) and in applied physics, in particular in particle therapy and space radiation protection elds
The study of the nuclear fragmentation processes occuring in the interaction of highly energetic ions in matter is of great interest in basic research and in applied physics, in particular in particle therapy and space radiation protection elds
The FIRST apparatus is composed of several subdetectors optimized for the detection of all the charged fragments produced by the interaction of a 12C ion with the carbon target up to a maximum aperture angle of 40 with respect to the beam axis
Summary
The study of the nuclear fragmentation processes occuring in the interaction of highly energetic ions in matter is of great interest in basic research (e.g. to improve the understanding of hadronic showers development in the atmosphere) and in applied physics, in particular in particle therapy and space radiation protection elds. The main limitation is the lack, or the large related uncertainty, of experimantal data [4] For these reasons, various recent experiments aimed at double di erential fragmentation cross sections measurements as a function of the angle and energy have been performed [5, 6], with a particular focus on the exploration of the energy region of interest for therapeutic application (100-400 MeV/u). Published under licence by IOP Publishing Ltd doi:10.1088/1742-6596/590/1/012035 with the carbon target, relative to a data sample of 25 M of detected incoming 12C ions, are reported here
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