Study of the near-barrier scattering of 8 He on 208 Pb

The structure and dynamics of 8He have been studied through the collisionprocess with a 208Pb target at energies of 22 and 16 MeV, aboveand below the Coulomb barrier, respectively. The energy and angular distributionsof the elastically scattered 8He and the 6;4He fragments weremeasured. In this paper, we discuss the method used to determine the effectiveposition of the beam spot on the reaction target and the scatteringand solid angles of each pixel of the detector array.