An experiment with 12 C beam fragmentation on a liquid hydrogen target has been performed using the magnetic spectrometer, Anomalon, equipped with a Cherenkov charge detector, and the Dubna synchrophasotron at a projectile energy of 3.66 GeV/nucleon. A charge resolution of 0.26e (except for the hydrogen nuclei) and a mass resolution of 0.11-0.18 amu have been achieved. Isotopic and elemental fragmentation cross sections have been obtained for fragments from Z = 1 to 6. Decayed cross sections have also been calculated. We compare the measured cross sections with the results of other experiments and with calculations based on semi-empirical and parametric approaches.
We present new results of measurements of the isotopic cross sections of 12 C fragmentation in the energy region of a few GeV/n. The experiment has been performed at the Dubna synchrophasotron using the magnetic spectrometer ANOMALON, equipped with Cherenkov counters. In this experiment 12 C is the projectile and liquid hydrogen is a target. The isotopic cross sections obtained in the measurement are compared with the values predicted by the models: semi-empirical (Silberberg and Tsao) and parametric (Webber, Kish and Schrier). This work is a continuation of the previous one where similar results, but at 3.66 GeV/n, are presented.
The tensor analyzing power T2p for the reaction d + '2C p(0 ) + X has been measured in the region of proton internal momenta k in light-cone dynamics up to 1 GeV/c. Measurements have been carried out at Dubna Synchrophasotron with polarized deuteron beam at deuteron momenta up to 9 GeV/c. When k increases the experimental values of T2o have a tendency to approach the value ( -0.3) obtained by the calculation based on the reduced nuclear amplitude method in which the quark degrees of freedom are taken into account.
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