Collective Flow in Nuclear Fragmentation Induced by 4.4 GeV Deuteron on Gold Target

Nuclear multifragmentation in d (4.4 GeV) + Au collision was studied with the 4 pi setup FASA installed at the external beam of the Dubna Nuclotron. Data obtained are analyzed within the statistical model of multifragmentation. It is found that the kinetic energy spectra of intermediate mass fragments deviate from the predicted ones. It is explained by the collective flow caused by the thermal expansion of fragmenting nucleus.