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We study the transverse momentum spectra of light nuclei (deuteron,anti-deuteron and triton) produced in Gold-Gold (Au-Au) collisions in differentcentrality bins by the blast wave model with Tsallis statistics. The modelresults are in agreement with the experimental data measured by STARCollaboration in special transverse momentum ranges. We extracted the kineticfreezeout temperature, transverse flow velocity and kinetic freezeout volume.It is observed that kinetic freezeout temperature and transverse flow velocityincreases initially, and then saturates from 14.5-39 GeV, while the kineticfreezeout volume increase initially up to 19.6 GeV but saturates from 19.6-39GeV. This may indicate that the phase transition starts in part volume thatends in the whole volume at 39 GeV and the critical point may exists somewherein the energy range of 14.5-39 GeV. The present work observed that the kineticfreezeout temperature, transverse flow velocity and kinetic freezeout volumehas a decreasing trend from central to peripheral collisions. We found thefreezeout volume of triton is smaller than those of deuteron and anti-deuteron,which shows that triton freezeout earlier than that of deuteron andanti-deuteron.

Freezeout properties of different light nuclei at the RHIC Beam Energy Scan