Nuclear Physics Seminar
Correlations and characterization of emitting sources in heavy-ion collisions
Guiseppe Verde
Space-time properties of heavy-ion collisions at intermediate
energies will be discussed by studying proton-proton and deuteron-
alpha correlation functions. In the case of correlations between
complex particles, the role played by collective motion and space-
momentum correlations has been studied. Deuteron-alpha correlation
functions measured in Xe+Au collisions at E/A=50 MeV are investigated
to estimate emission densities. A montecarlo approach reveals that
the effects induced by collective motion include a reduction of the
apparent size of the emitting source and a distortion of the line
shape of the d-$\alpha$ correlation function. These effects are due
to a correlation between position and relative momentum of the
emitted pairs. The developed ideas show that intensity interfrometry
with complex particles is sensitive not only to the geometry of the
system but also to the interplay between collective and thermal motion.
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