Cross section measurements of large angle fragments production in the interaction of carbon ion beams with thin targets

Abstract The fragmentation cross sections of carbon ion beams with kinetic energies of 115– 353~MeV/u 353 MeV / u impinging on thin targets of graphite (C), polyvinyl-toluene (C ₉ 9 H ₁₀ 10) and PMMA (C ₅ 5 O ₂ 2 H ₈ 8) have been measured at 90 ^ ∘ and 60 ^ ∘ at the CNAO particle therapy center (Pavia, Italy). Two detection arms were positioned at two different angles to perform the measurement at 90 ^ ∘ and 60 ^ ∘. The fragment species have been identified in charge (Z ₈₃ id = H) and mass (M ₈₃ id = ¹ 1 H, ² 2 H, ³ 3 H) combining the information of the deposited energy in thin plastic scintillators, of the deposited energy in a thick LYSO crystal and of the fragments Time of Flight (ToF) measurement. The ToF was also used to compute the fragments measured