The fragmentation cross sections of carbon ion beams with kinetic energies of 115–353MeV/u impinging on thin targets of graphite (C), polyvinyl-toluene (C9H10) and PMMA (C5O2H8) 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 (Zid = H) and mass (Mid = 1H, 2H, 3H) 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 kinetic energy. This work presents, for the first time, a comparison of the measured fragmentation cross sections with predictions from FLUKA Monte Carlo and Geant4 codes. Such a comparison has never been shown before at the beam energies involved in this study, particularly for large-angle fragment production. A complete reanalysis by the FOOT collaboration of already published elemental cross section on composite targets has been performed to compare data with Monte Carlo, improving the analysis strategy and systematics uncertainties evaluation. The kinetic energy at production of measured fragments has been completely redefined, together with the efficiencies computation. The new analysis strategy has been successfully validated against the Monte Carlo cross sections. The cross sections are presented as a function of the fragments kinetic energy at production thanks to an unfolding technique applied to the data.
Cross section measurements of large angle fragments production in the interaction of carbon ion beams with thin targets
Zarrella R.;Schiavi A.;Ridolfi R.;Quattrini F.;Pullia M.;Pisanti C.;Peverini F.;Pennazio F.;Patera V.;Morrocchi M.;Masci S.;Manna A.;Kraan A. C.;Faccini R.;Donetti M.;Dondi M.;Ciarrocchi E.;Cerello P.;Bisogni M. G.;Barbanera M.;Mattei I.;
2026-01-01
Abstract
The fragmentation cross sections of carbon ion beams with kinetic energies of 115–353MeV/u impinging on thin targets of graphite (C), polyvinyl-toluene (C9H10) and PMMA (C5O2H8) 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 (Zid = H) and mass (Mid = 1H, 2H, 3H) 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 kinetic energy. This work presents, for the first time, a comparison of the measured fragmentation cross sections with predictions from FLUKA Monte Carlo and Geant4 codes. Such a comparison has never been shown before at the beam energies involved in this study, particularly for large-angle fragment production. A complete reanalysis by the FOOT collaboration of already published elemental cross section on composite targets has been performed to compare data with Monte Carlo, improving the analysis strategy and systematics uncertainties evaluation. The kinetic energy at production of measured fragments has been completely redefined, together with the efficiencies computation. The new analysis strategy has been successfully validated against the Monte Carlo cross sections. The cross sections are presented as a function of the fragments kinetic energy at production thanks to an unfolding technique applied to the data.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
