title: Correlations in alpha-alpha scattering and semi-classical optical models.
abstract: We show the equivalence of semi-classical solutions to optical model coupled-channel equations derived from Watson's form of the nucleus-nucleus multiple-scattering series to the Glauber multiple-scattering series.  A second-order solution to the semi-classical coupled-channel elastic amplitude is shown to be nearly equivalent to a second-order optical-phase-shift approximation to the Glauber amplitude if the densities of all nuclear excited states are approximated by the ground-state density.  Using the Jastrow method to model the two-body density we find an average excited-state density to be of negligible importance in the double-scattering  region of alpha-alpha scattering.
authors.affiliation: Physics Department, Old Dominion University, Norfolk, VA 23508, USA.
authors.forename: F A
authors.initials: FA
authors.lastname: Cucinotta
authors.forename: G S
authors.initials: GS
authors.lastname: Khandelwal
authors.forename: L W
authors.initials: LW
authors.lastname: Townsend
authors.forename: J W
authors.initials: JW
authors.lastname: Wilson
mesh_terms: D000512:Alpha Particles; D004735:Energy Transfer; D006371:Helium; D008433:Mathematics; D008962:Models, Theoretical; D009686:Nuclear Physics; D012542:Scattering, Radiation
chemical_list: D006371:Helium