In-plane light particle correlations in 40 MeV/nucleon C+C, Ag, Au, and 50 MeV/nucleon C+C reactions.

Abstract

Large angle correlations have been measured between two light particles (Z=1,2) emitted from 40 MeV/nucleon C+C, Ag, Au, and 50 MeV/nucleon C+C reactions. The first particle is detected at \ensuremath{\theta}=-45\ifmmode^\circ\else\textdegree\fi{}, and the second particle is detected in the same plane with -150\ifmmode^\circ\else\textdegree\fi{}\ensuremath{\le}\ensuremath{\theta}\ensuremath{\le}+150\ifmmode^\circ\else\textdegree\fi{}. The correlations are consistent with emission from a thermalized system that is constrained by momentum conservation effects. In addition, the decay of particle unstable states contributes heavily to the coincidence cross sections for p-p, p-t, p${\mathrm{\ensuremath{-}}}^{4}$He, d${\mathrm{\ensuremath{-}}}^{4}$He, t${\mathrm{\ensuremath{-}}}^{4}$He, and $^{4}\mathrm{\ensuremath{-}}^{4}$He correlations.