title: Microscopic optical model calculations of 4He, 12C-nucleus absorption cross sections.
abstract: Calculations of absorption cross sections using a microscopic first-order optical potential for heavy-ion scattering are compared with experiments. In-medium nucleon-nucleon (NN) cross sections were used to calculate the two-body scattering amplitude. A medium-modified first-order optical potential was obtained for heavy-ion scattering using the in-medium two-body scattering amplitude. A partial wave expansion of the Lippmann-Schwinger equation in momentum space was used to calculate the absorption cross sections for various systems. The results are presented for the absorption cross sections for 4He-nucleus and 12C-nucleus scattering systems and are compared with the experimental values in the energy range 18-83A MeV. The use of the in-medium NN cross sections is found to result in significant reduction of the free space absorption cross sections in agreement with experiment.
authors.affiliation: Old Dominion University, Norfolk, VA 23529, USA.
authors.forename: R R
authors.initials: RR
authors.lastname: Dubey
authors.forename: G S
authors.initials: GS
authors.lastname: Khandelwal
authors.forename: F A
authors.initials: FA
authors.lastname: Cucinotta
authors.forename: J W
authors.initials: JW
authors.lastname: Wilson
mesh_terms: D002244:Carbon; D004601:Elementary Particles; D020450:Heavy Ions; D006371:Helium; D008433:Mathematics; D008962:Models, Theoretical; D009686:Nuclear Physics; D055095:Optics and Photonics; D012542:Scattering, Radiation
chemical_list: D006371:Helium; D002244:Carbon