BRIGHT INTERIOR OF NUCLEI VIEWED BY ALPHA-PARTICLES - HIGH-ORDER EIKONAL EXPANSION

The possibility of observing a bright interior in the nucleus ''viewed '' by intermediate energy alpha particles (E-alpha=172.5 MeV), as a pr obe for the Ni-58 nucleus, previously predicted by applying only a fir st-order noneikonal correction and one simple optical model potential was confirmed. The first-, second-, and third-order noneikonal correct ions to the Glauber model were incorporated in three arbitrary differe nt nominal optical potentials and the effects of switching (off/on) th e Coulomb potential were studied. The role of corrections in the effec tive potentials and also the results of calculations of the imaginary part of the phase shift functions for the different optical potentials used were discussed.