Fragmentation cross sections of 600 MeV/nucleon Ne-20 on elemental targets- art. no. 024902

Charge-changing and fragment production cross sections have been obtained f or interactions of a 600 MeV/nucleon neon beam in H, C Al. Cu. Sn. Ta. and Ph targets. The H target results were obtained using a polyethylene target and subtracting the cross sections obtained with the carbon target. At 600 MeV/nucleon, the angular distributions of the fragments are strongly forwar d peaked, and consequently the spectra seen in the detectors with the large st angular acceptance-corresponding to a forward cone with half angle 7 deg rees -show obvious fragment peaks only for charges 5 through 9. No clear pe aks are seen below charge 5 in the large-acceptance detectors, but spectra from detectors subtending smaller angular acceptances show peaks for all fr agment species, and additional identifiable peaks from events with between two and four fragments in coincidence. Production cross sections for all fr agment species are reported here and, where possible, compared to earlier m easurements and to the predictions of three model calculations (Nucfrg2, Qm sfrg, and an empirical parametrization that is tuned for higher-mass beams) . The cross sections for fragments of charge 5 and below have not been prev iously reported. Also, the charge-changing cross sections are compared to e arlier measurements and to Nucfrg2 and the Bradt-Peters model.