Observation of Two-Proton Azimuthal Angle Correlations in 2 GeV/Nucleon Heavy Ion Interactions

摘要

A weak two-proton azimuthal angle back-to-back correlation which may indicate the presence of quasi-elastic first order proton-proton scattering in exp 16 O + CNO reactions at 2 GeV/nucleon has been observed. Low and medium multiplicity exp 16 O + AgBr reactions show the same tendency, while the dominant feature of the two-proton azimuthal angle distribution for very high multiplicity events is a blockade against pairs with relative angles between 2 pi /3 and 7 pi /8. (Atomindex citation 10:432105)